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Manual Toro 30874

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  • Toro 30874 - page 1

    (Models 30873, 30874, 30881 and 30882) Part No. 14205SL Service Manual Groundsmaster R 4500 - - D/4700 - - D Preface The pur pose of t his public ation is to pr ovide the serv ice technic ian with i nfor mati on for tr oubleshooting, t est ing and repair of maj or syst ems and co mponents on the Gr oundsmas ter 4500- - D (Models 30873 and 30881) an ...

  • Toro 30874 - page 2

    Gr oundsmas ter 4500 - - D/ 4700 - - D This page is intent ional ly blank . ...

  • Toro 30874 - page 3

    Gr oundsmas ter 4500 - - D/ 4700 - - D T able Of Contents Chapter 1 - - Safety Gener al Safet y I nst ruc tions 1 - - 2 .................. Jackin g Instructions 1 - - 5 ......................... Safet y and I nst ruc tion Dec als 1 - - 6 ................ Cha pter 2 - - Product R ec ords and Maint enanc e Produc t Records 2 - - 1 ................... ...

  • Toro 30874 - page 4

    Gr oundsmas ter 4500 - - D/ 4700 - - D This page is intent ional ly blank . ...

  • Toro 30874 - page 5

    Groundsmaster 4500- - D/4700 - -D Page 1 - - 1 Safet y Chapter 1 Safety T able o f Contents GENERAL SAFETY INSTRUCTIONS 2 ............ Before Oper ating 2 ............................ While Operating 3 ............................ Maintenance and Service 4 .................... JACKING INSTRUCTIONS 5 ..................... SAFETY AND INSTRUCTION DECA ...

  • Toro 30874 - page 6

    Groundsmaster 4500- - D/4700 - -D Page 1 - - 2 Safety General Safety Instructions The Groun dsmaster 4500 -D and 470 0 - - D have bee n tested and certifi ed by TORO for compliance with exist- ing safety standards and spec ifications. Although haz- ard control and accident prevention partially are dependent upon the d esign and configuration of the ...

  • Toro 30874 - page 7

    Groundsmaster 4500- - D/4700 - -D Page 1 - - 3 Safet y While Operating 1. Sit on the seat when st arting an d operating th e ma- chine. 2. Before starting the eng ine: A. Engage the par king brake. B. Make sure traction pedal i s in neutral and the PTO switch is OFF (dise ngaged). C. After eng ine is start ed, relea se parking b rake and keep foot ...

  • Toro 30874 - page 8

    Groundsmaster 4500- - D/4700 - -D Page 1 - - 4 Safety Maintenance and Service 1. The T raction Unit and Cutting Deck Operator ’s Manuals provide information r egarding the operation, general main tenance and maintenanc e intervals for your Groundsmaster machin e . Refer to these publica- tions for a dditional infor mation whe n servicing the ma - ...

  • Toro 30874 - page 9

    Groundsmaster 4500- - D/4700 - -D Page 1 - - 5 Safet y Jacking Instructions CAUTION When changing attachments, tires or perform- ing other servic e, use correct jacks and sup- ports. Make sure machine is park ed on a solid, level surface such as a concre te floor . Prior to raising machine, remove any attac hments that may interfere with the safe a ...

  • Toro 30874 - page 10

    Groundsmaster 4500- - D/4700 - -D Page 1 - - 6 Safety Safety and Instruction Decals Numerous safe ty and instruction decals are affixed to the Groundsmaster 4500- -D and 4700 - - D. If any decal becomes illegible o r damaged, install a new decal. De- cal part numbers are listed in y our Parts Catalog. ...

  • Toro 30874 - page 11

    Groundsmaster 4500- - D/4700 - -D Page 2 - - 1 Product Records a nd Maintenance Chapter 2 Product Records and Maintenance T able o f Contents PRODUCT RECORDS 1 ......................... MAINTENANCE 1 .............................. EQUIV ALENTS AND CONVERSIONS 2 ........... Decimal and Millimeter Equivalents 2 ............ U.S. to Metric Conversions ...

  • Toro 30874 - page 12

    0.09375 Groundsmaster 4500- - D/4700 - -D Page 2 - - 2 Product Records a nd Maintenance Equivalents and Conversions ...

  • Toro 30874 - page 13

    Groundsmaster 4500- - D/4700 - -D Page 2 - - 3 Product Records a nd Maintenance T or que Specifications Recommended fastener torque values are listed in the following tables. For critical applications, as determined by T oro, either t he recommended torque or a torque that is unique to the application is clearly iden tified and spe- cified in this ...

  • Toro 30874 - page 14

    Groundsmaster 4500- - D/4700 - -D Page 2 - - 4 Product Records a nd Maintenance Standard T orque for Dry , Z inc Plate d and Steel Fasteners (Inch Series) Thread Size Grade 1, 5 & 8w i t hT h i n Height Nuts SAE Grade 1 Bolts, Screws, Studs & Sems with Regular Hei ght Nuts (SAE J995 G rade 2 or St ronger Nuts) SAE Grade 5 Bolts, Sc rews, St ...

  • Toro 30874 - page 15

    Groundsmaster 4500- - D/4700 - - D Page 2 - - 5 Product Records a nd Maintenance Standard T o rque for Dry , Zinc Plated a nd Steel Fasteners (Metric Series) Thre ad Size Class 8.8 Bolts, Screws and Studs with Regular Height Nuts (Class 8 or Stronger Nuts) Class 10.9 Bolts, Screws and Studs with Regular Height Nuts (Class 10 or Stronger Nuts) M5 X ...

  • Toro 30874 - page 16

    Groundsmaster 4500- - D/4700 - - D Page 2 - - 6 Product Records a nd Maintenance Other T orque Specifications SAE Grade 8 Steel Set Screws Thread Size Recommended T orque Square Head Hex Socket 1/4 - - 20 UNC 140 + 20 in - - lb 73 + 12 in - - lb 5/16 - - 18 UNC 215 + 35 in - - lb 145 + 20 in - - lb 3/8 - - 16 UNC 35 + 10 ft - - lb 18 + 3f t - - l b ...

  • Toro 30874 - page 17

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 Y anmar Diesel Engine Chapter 3 Y anmar Diesel Engine T able o f Contents SPECIFICA TIONS 2 ............................ Models 3087 3 and 30874 2 .................... Models 3088 1 and 30882 3 .................... GENERAL INFORMA TION 4 ..................... Operator ’s Manu als 4 ................. ...

  • Toro 30874 - page 18

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 2 Y anmar Diesel Engine Specifications (Models 30873 and 30874) Item Description Make / Designation Y anmar Model 4TNV84T- - ZMTR: 4 - - Cycle, 4 Cylinder , W ater C ooled, T urboc harged, T ier 4i Diesel Engine Bore 3.307 in (84 mm) Stroke 3.543 in (90 mm) T o tal Dis place ment 121.7 in 3 (19 95 c c) ...

  • Toro 30874 - page 19

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 3 Y anmar Diesel Engine Specifications (Models 30881 and 30882) Item Description Make / Designation Y anmar Model 4TNV86CT - - DT R: 4 - - Cycle, 4 Cylinder , W ater Cooled, Turbocharged, T ier 4 Diesel Engine Bore 3.386 in (86 mm) Stroke 3.543 in (90 mm) T otal Displacement 127 .5 in 3 (2090 cc) Firing ...

  • Toro 30874 - page 20

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 4 Y anmar Diesel Engine General Information This Chapter gives information about specifications and repair of the diese l engine used in the Groundsma ster 4500 - - D and 4 700 - - D. General maintenance pro cedures are described in your T raction Unit Operator ’s Manual. Inform a tion on engine troub ...

  • Toro 30874 - page 21

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 5 Y anmar Diesel Engine Engine Electronic Control Unit (EC U) The Y anmar engine that powers y our Groundsmaster uses an electronic cont rol unit (ECU) fo r engine man- agement and also to co mmunicate wit h the machine TEC controllers and the operator Info Center display on the mach ine. All wir e harn ...

  • Toro 30874 - page 22

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 6 Y anmar Diesel Engine Y anmar Engine: Models 3087 3 and 30874 The engine u sed on Groundsmaster mo dels 30873 and 30874 is a Y anm ar TNV Series, tu rbochar ged, diesel engine that complies with EP A interim T ier 4 emission regulations. Engi ne features include an electronic con- trol unit (ECU) cont ...

  • Toro 30874 - page 23

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 7 Y anmar Diesel Engine Assist regeneration occurs if the engine ECU senses that the DPF b ackpressure has increase d to its max im- um threshold. During assist regener ation, the intake throttle valve limits the air flow into the eng ine while the injectors add additional fuel. This process in creases ...

  • Toro 30874 - page 24

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 8 Y anmar Diesel Engine Service and Repairs Air Cleaner Sy stem Figure 6 FRONT RIGHT 1. Air cleaner assembly 2. Air cleaner mount 3. Indicator 4. Adapt er 5. Air cleaner strap 6. Socket head screw (2 used) 7. Flat washer (2 used) 8. Flat washer (2 used) 9. Lock nut (2 used) 10. Spring (2 used) 1 1. Cap ...

  • Toro 30874 - page 25

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 9 Y anmar Diesel Engine Removal (Fig. 6) 1. Park machine on a level s urface, lower cu tting decks, stop engine, apply parking brake and remove key from the ignition switch . 2. Raise and support h ood. 3. Remove air clea ner components as needed using Figure 6 as a guide. Installation (Fig. 6) IMPORT A ...

  • Toro 30874 - page 26

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 0 Y anmar Diesel Engine Fuel System Figure 9 1. Fuel suction tube 2. Fuel gauge 3. Fuel hose (supply) 4. Return fitting 5. Fuel hose (return) 6. Fuel tank cap 7. Bus hing ( 2 used ) 8. Hose clamp (6 used) 9. Fuel tank 10. Cap screw (2 used) 11 . C l a m p ( 2 u s e d ) 12. Flange nut (2 used) 13. Fuel ...

  • Toro 30874 - page 27

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 1 Y anmar Diesel Engine DANGER Because diesel fuel is highly flammable, use cau- tion when storing or handling i t. Do not smoke while filling the fuel tank. Do not fill fuel tank while engine is running, hot or when machine is in an enclosed area. Always fill fuel tank outside and wipe up any spilled ...

  • Toro 30874 - page 28

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 2 Y anmar Diesel Engine Radiator and Oil Cooler Assem bly 1. Radiator/oil cooler assembly 2. Cap screw (4 used) 3. W asher (4 used) 4. Fan 5. Plenum assembly 6. Cap screw (6 used) 7. Flange nut (6 used) 8. Air intake hose 9. Hose 10. Hose clamp (4 used) 1 1. Upper radiator shroud 12. Lower radiator sh ...

  • Toro 30874 - page 29

    Groundsmaster 4500- - D/4700 - - D P age 3 - - 13 Y anmar Diesel Engine Removal (Fig. 1 1) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Remove hood fro m the machin e (see Hood Rem oval in the Service and Repairs section of Chapter 7 - - Chas- sis). CAUTION ...

  • Toro 30874 - page 30

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 4 Y anmar Diesel Engine 13. Plug all radiator/oil cooler and hose op enings to pre- vent contamination. 14. If necessary , remove draincock (item 7 in Fig. 13), plug (item 6 in Fig. 13) and hydraulic pl ug (item 8 in Fig. 13) from radiator/oil cooler . 15. If hydraulic fittings (item 3 in Fig. 13) are ...

  • Toro 30874 - page 31

    Groundsmaster 4500- - D/4700 - - D P age 3 - - 15 Y anmar Diesel Engine This page is intentionally blank. Ya n m a r Diesel Engine ...

  • Toro 30874 - page 32

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 6 Y anmar Diesel Engine Engine Figure 14 1. LH front engine mount br acket 2. RH front engine mount bracket 3. LH rear engine mount b racket 4. RH rear engine mount bracket 5. Lock washer (16 used) 6. Cap scre w (16 u sed) 7. Engine mount (4 used) 8. Flange head screw (8 used) 9. Fl ange n ut (13 used ...

  • Toro 30874 - page 33

    Groundsmaster 4500- - D/4700 - - D P age 3 - - 17 Y anmar Diesel Engine Engine Removal (Fig. 14) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Remove hood fro m the machin e (see Hood Rem oval in the Service and Repairs section of Chapter 7 - - Chas- sis). 3 ...

  • Toro 30874 - page 34

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 1 8 Y anmar Diesel Engine 10. Support hydraulic pump assembly to prevent it from shifting or falling. Remove fastener s that secure piston (traction) pump to engi ne (see Piston (T raction) Pump in the Service and Repairs section of Chapter 4 - - Hy- draulic System). 1 1. Make sure all cable ties securi ...

  • Toro 30874 - page 35

    Groundsmaster 4500- - D/4700 - - D P age 3 - - 19 Y anmar Diesel Engine 13. Check position of wires, fuel lines and hyd raulic hoses for proper clearance with rotating, high temp era- ture and moving compone nts. 14. Connect positive battery cable to battery first and then negati ve battery cable. Secur e battery cover to ma- chine. 15. Check and a ...

  • Toro 30874 - page 36

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 2 0 Y anmar Diesel Engine Pump Ada pter Plate Figure 17 1. Flyw heel p late 2. Hardened washer (8 used) 3. Spring coupler 4. Cap screw (8 used) 5. Cap screw with patchlock (8 used) 6. Hardened washer (8 used) 7. Engine assembly FRON T RIGHT 1 3 5 2 4 6 7 29 to 33 ft - - lb (40 to 44 N - - m) Boss 29 to ...

  • Toro 30874 - page 37

    Groundsmaster 4500- - D/4700 - - D P age 3 - - 21 Y anmar Diesel Engine Coupler Removal (Fig. 17) NOTE: The hydraulic pump assembly ne eds to be re- moved from engine befor e coupler can be removed . 1. If engine is in machine, remove hydrau lic pump as- sembly (see Piston (T raction) Pump in the Service and Repairs section of Chapter 4 - - Hydraul ...

  • Toro 30874 - page 38

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 2 2 Y anmar Diesel Engine Exhaust System (Mod els 30881 and 30882) Figure 19 1. Gasket 2. Exhaust assembly stay 3. Exhaust assembly stay 4. Exhaust assembly stay 5. Exhaust assembly stay 6. Nut 7. DOC t emp senso r (inle t) 8. DOC temp sensor (outlet) 9. Nut ( 4 used) 10. DOC assembly 1 1. Nut (3 used) ...

  • Toro 30874 - page 39

    Groundsmaster 4500- - D/4700 - - D P age 3 - - 23 Y anmar Diesel Engine Groundsmaster models that are powered by a diesel en- gine that complies with EP A T ier 4 emission regulations are equipped with an exhau st system that includes a diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF). These exhau st components require service ...

  • Toro 30874 - page 40

    Groundsmaster 4500- - D/4700 - - D Page 3 - - 2 4 Y anmar Diesel Engine This page is intentionally blank. ...

  • Toro 30874 - page 41

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Pa ge 4 - - 1 Chapter 4 Hydraulic System T able o f Contents SPECIFICA TIONS 2 ............................ GENERAL INFORMA TION 3 ..................... Operator ’s Manu al 3 .......................... Check Hydraulic Fluid 3 ....................... T owing T raction Unit 4 ..................... ...

  • Toro 30874 - page 42

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 2 Specifications Item Description Piston (Traction ) Pump Sauer - - Danfoss V ariable Displacement Axial Piston Pump Maximum Displacement (per revolution) 2.75 in 3 (45 c c) System Relief Pressure: Forward 4350 PSI (300 bar) System Relief Pressure: Re v erse 5000 PSI (345 bar) Charge Pr ...

  • Toro 30874 - page 43

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Pa ge 4 - - 3 General Information Operator ’ s Manual The Operator ’s Manu al provides info rmation regarding the operation, general main tenance and maintenance intervals for your Ground smaster machine. Refer to that publication for additional information when servicing the machine. Check Hy ...

  • Toro 30874 - page 44

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 4 T owing T raction Unit IMPORT ANT : If towing limits a re exceeded, severe damage to the piston pump may occur . If it becomes necessary to tow (or push) the machine, tow (or push) in a forward direc tion only , at a speed below 3 mph (4.8 kph) and for a dis tance less tha n 1/4 mile ...

  • Toro 30874 - page 45

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Pa ge 4 - - 5 Relieving Hydraulic System Pressu re Before disconnectin g or performin g any work on the hy- draulic system, all pressure in the hydraulic system must be relieved. Park machine on a level surface, make sure that PT O switch is OFF , lower cutting decks fully , stop engine and en gag ...

  • Toro 30874 - page 46

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 6 Hydraulic Hoses Hydraulic hoses are subject to extre me conditions su ch as pressure d ifferentials du ring operation and exposure to weather , sun, che micals, very warm s torage cond i- tions or mishandling during operation and mainte nance. These conditions can ca use hose damage a ...

  • Toro 30874 - page 47

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Pa ge 4 - - 7 Hydraulic Hose and T ube Installation (O - - Ring Face Seal Fitting) 1. Make sure threads and sealing surfaces of the hose/ tube and the fitting are free of burrs, nicks, scratches or any foreign material. 2. As a preventative measure aga inst leakage, it is rec- ommended that t he f ...

  • Toro 30874 - page 48

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 8 Hydraulic Fitting Installation (SAE S traight Thread O - - R ing Fitting into Component Port) Non - - Adjustable Fitting (Fig. 6) 1. Make sure al l threads and sealing surfaces of fitting and component port are free of burrs, nicks, scratches or any foreign m aterial. 2. As a prevent ...

  • Toro 30874 - page 49

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Pa ge 4 - - 9 Adjustable Fitting (Fi g. 8) 1. Make sure all thr eads and sealing surfa ces of fitting and component port are free of burrs, nicks, scratches or any foreign material. 2. As a preventative measure aga inst leakage, it is rec- ommended that the O- - ring be rep laced any time the conn ...

  • Toro 30874 - page 50

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 10 Hydraulic Schematics Hydraulic Schematic Groundsmaster 45 00 - - D All solenoids are shown as de - - energized NOTE: A larger hydraulic schematic is included in Chapter 9 - - F oldout Drawings 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T ...

  • Toro 30874 - page 51

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 1 Hydraulic Schematic Groundsmaster 4700- - D All solenoids are shown as de - - ener giz ed NOTE: A larger hydraulic schematic is included in Cha pter 9 - - Foldout Drawings 0.630 ” ROD 1050 6.2 GPM 11 . 4 G P M T PRV S1 CV FD P2 P1 ST L M1 M2 PE T R 50/50 FLOW DIVID ER FA N C O N T ...

  • Toro 30874 - page 52

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 12 Hydraulic Flow Diagrams T raction Circuit: LOW Speed (GM 4500 - - D Forward Shown) Working Pressure Low Pressure (Charge) Return or Suction Flow Groundsmaster 450 0 - - D/4700 - - D 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 P ...

  • Toro 30874 - page 53

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 13 T raction Circuit: LOW S peed (Mow) The traction circuit piston pump is a variable d isplace- ment pump that is directly coupled to the en g ine fly- wheel. This pump utilizes an in tegral electro - - hydraulic servo piston assembly that co ntrols the rate and dire c- tion of hydraul ...

  • Toro 30874 - page 54

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 14 T raction Circuit: H I Speed (GM 4500 - - D Forward Shown) Working Pressure Low Pr ess ure (C harge) Return or Suction Flow Groundsmaster 450 0 - - D/4700 - - D 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 ...

  • Toro 30874 - page 55

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 15 T raction Circuit: HI Spe ed (T ransport) The traction circuit piston pump is a variable d isplace- ment pump that is directly coupled to the en g ine fly- wheel. This pump utilizes an in tegral electro - - hydraulic servo piston assembly that co ntrols the rate and dire c- tion of h ...

  • Toro 30874 - page 56

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 16 Working Pressure Low Pressure (Charge) Return or Suction Flow Ground smaster 4500 - - D Lower Cutting Decks Lift Switch Pressed to Lower Decks 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV0 9 PRV S1 ...

  • Toro 30874 - page 57

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 17 Lower Cutting Decks: Groundsmaste r 4500 - - D A four section gear pump is coupled to the piston ( trac- tion) pump . The third gea r pump sectio n supplies hy - draulic flow to both the lif t control manifold and the steering control valve . Hydraulic flow from this pump section is ...

  • Toro 30874 - page 58

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 18 Wo rking Pressure Low Pressure (Charge) Return or Sucti on Flow Groundsmaster 4700- - D Lower Cutting Decks All Lift Switches Pressed to Low er Decks 0.630” ROD 1050 6.2 GPM 11 . 4 G P M T PRV S1 CV FD P2 P1 ST L M1 M2 PE T R 50/50 FL OW DIVIDER FAN CONTROL MANIFOLD MANIFOLD 30.5 G ...

  • Toro 30874 - page 59

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 19 Lower Cutting Decks: Groundsmaste r 4700 - - D A four section gear pump is coupled to the piston ( trac- tion) pump . The third gea r pump sectio n supplies hy - draulic flow to both the lif t control manifold and the steering control valve . Hydraulic flow from this pump section is ...

  • Toro 30874 - page 60

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 20 Wor king Pressure Low Pressure (Charge) Return or Suction Flow Groundsmaster 4500- - D Raise Cutting Decks Lift Switch Pressed to Raise Decks 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV ...

  • Toro 30874 - page 61

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 21 Raise Cutting Decks: Groundsmaster 450 0 - - D A four section gear pump is coupled to the piston ( trac- tion) pump . The third gea r pump sectio n supplies hy - draulic flow to both the lif t control manifold and the steering control valve . Hydraulic flow from this pump section is ...

  • Toro 30874 - page 62

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 22 Wor ki n g Pr es s u re Low Pressure (Charge) Return or Sucti on Flow Groundsmaster 4700- - D All Lift Switches Pressed to Raise Decks Raise Cutting Decks 0.630” RO D 1050 6.2 GPM 11 . 4 G P M T PRV S1 CV FD P2 P1 ST L M1 M2 PE T R 50/50 FLOW DIVIDE R FAN CONTROL MANIFOLD MANIFOLD ...

  • Toro 30874 - page 63

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 23 Raise Cutting Decks: Groundsmaster 470 0 - - D A four section gear pump is coupled to the piston ( trac- tion) pump . The third gea r pump sectio n supplies hy - draulic flow to both the lif t control manifold and the steering control valve . Hydraulic flow from this pump section is ...

  • Toro 30874 - page 64

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 24 Mow Circuit (GM 4500 - - D Shown) Wo rking Pressure Low Pressure (Charge) Return or Sucti on Flow Groundsmaster 4500- - D/4700 - - D 0.630” RO D 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV FD P2 P ...

  • Toro 30874 - page 65

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 25 Mow Circuit Hydraulic flow for the mow circuit is supplied by the first two (2) sections of the gear pump. The first gear pump section P1 suppli es hydraulic flow to decks 5, 3 a nd 2 (also deck 7 on the G M 4700 - - D), while the second gear pump section supplies decks 1 and 4 (also ...

  • Toro 30874 - page 66

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 26 Cutting Deck Blade Braking When the operator turns th e PTO switch OFF (or if the decks are raised), deck manifold solenoid va lves (PRV1, PRV2, SV1 and SV2) are d e - - ener gized. Th e valves will shift to direct oil away from the deck motors and toward the oi l cooler and filter . ...

  • Toro 30874 - page 67

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 27 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 68

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 28 Steering Circuit (GM 4500 - - D Right T urn Shown) Working Pressure Low Pr ess ure (C harge) Return or Suction Flow Groundsmaster 450 0 - - D/4700 - - D 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV0 ...

  • Toro 30874 - page 69

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 29 Steering Circuit A four section gear pump is coupled to the piston ( trac- tion) pump . The third gea r pump sectio n supplies hy - draulic flow to the ste ering con trol valv e and the lift/lower control valve. Pump h ydraulic flow is delivered to the two circuits through a proporti ...

  • Toro 30874 - page 70

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 30 Engine Cooling Fan Circuit (GM 4500 - - D Normal Fan Direction Shown) Working Pressure Low Pressure (Charge) Return or Suction Flow Groundsm aster 4500 - - D /4700 - - D 0.630” ROD 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 ...

  • Toro 30874 - page 71

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 31 Engine Cooling Fan Circuit A four section gear pump is coupled to the piston ( trac- tion) pump. The fina l gear pump section (farthest from the piston pump) su pplies hydraulic fl ow for the hydrau- lic engine cooling fan m otor . The fan control manifol d controls the operation of ...

  • Toro 30874 - page 72

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 32 Special T ools Order these spe cial tools from you r T oro Distribut or . Hydraulic Pressure T est Kit Use to take various pressure read ings for diagnostic tests. Quick disconnect fitti ngs provided attach directly to mating fittings on machine test ports without tools. A high press ...

  • Toro 30874 - page 73

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 33 40 GPM Hydraulic T ester (Pressure and Flow) Use to test hydraulic circuits and components for flow and pressure capacities as recommended in the T estin g section of this chapte r . This tester includes the f ollowing: 1. LOAD V AL VE: A simulated working load is create d in the cir ...

  • Toro 30874 - page 74

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 34 High Flow Hydraulic Filter Kit The high flow hydraulic filt er kit is designed with large flow (40 GPM/150 LPM) and high pre ssure (5000 PSI/345 bar) capabilities. This kit provides for bi - - direc- tional filtration whi ch prevents filtered debris from being allowed back into the c ...

  • Toro 30874 - page 75

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 35 Hydraulic T est Fitting Kit This kit includes a variety of O - - ring Face Seal fittings to enable you to co nnect test gauges in to the system. The kit includes: tee’ s, unions, reducers, plugs, caps and male test fittings. T oro Part Number: TOR407 9 Figure 32 Measuring C ontaine ...

  • Toro 30874 - page 76

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 36 Remote Starter Switch After flushing the hydraulic system or replacing a hy- draulic component (e.g. gear pump, pi ston pump, wheel motor), it is nec essary to pr ime the hydr aulic pumps. A remote starter switch (Fig. 35) can be used for this pur- pose. Obtain a remo te starter swit ...

  • Toro 30874 - page 77

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 37 T roubleshooting The charts that follow conta in information to assist in hy- draulic system troubleshooting. There may possib ly be more than one cause for a machi ne malfunction. Refer to the T esting section of this Chapter for prec au- tions and specific testing procedures. Gener ...

  • Toro 30874 - page 78

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 38 T raction Circuit Pr oblems NOTE: When troubleshooting tra ction circuit problems, if a problem exist s in both low (mow) an d high (transp ort) speeds, consider a faulty component that af fects the en- tire traction circuit (e.g. char ge circuit, traction circuit re- lief valves, pi ...

  • Toro 30874 - page 79

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 39 Mow Circuit Problems Problem Possible Cause None of the cutting decks w ill oper- ate. NOTE: T o engage the mow circu it, t h es e a tm u s tb eo c c u p i e d ,t h ec u t - ting deck(s) must be fully lowered, the traction speed m ust be in the LOW (mow) position and the PT O switch ...

  • Toro 30874 - page 80

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 40 Mow Circuit Problems (Continued) Problem Possible Cause All cutting decks opera te slowly . Engine RP M is low . Deck motor is damaged. First and second gear pump sections are worn or damaged. Cutting deck stop s under load. Relief valve in deck control manifold is bypassing. T racti ...

  • Toro 30874 - page 81

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 41 Lift/Lower Circuit Problems Problem Possible Cause Cutting decks will not raise. NOTE: Operator m ust be in seat in order to raise t he cutting decks. Operator seat is unoccupied. Hydraulic oil level in reservoir is low . Electrical problem exists that preve nts lift control manifold ...

  • Toro 30874 - page 82

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 42 Engine Cooling Fan Cir cuit Problems Problem Possible Cause Cooling fan runs on ly in forward di- r e c t i o n( f a nd o e sn o tr u ni nr e v e r s e direction). Fan control manifold so lenoid cartridge valve (S 1) is faulty . Electrical problem exists that prevents fa n control ma ...

  • Toro 30874 - page 83

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 43 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 84

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 44 Te s t i n g The most effective method for isol ating problems in the hydraulic system is by using hydraulic test equipment such as pressure gauges and flo w m eters in the ci rcuits during vari ous operatio nal checks (S ee the Special T ools section in this chapter). IMPORT ANT : A ...

  • Toro 30874 - page 85

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 45 Which Hydraulic T ests Are Necessary? Before begin ning any hydra ulic test, i dentify if t he prob - lem is related to the traction circui t , cutting (mow) circuit, lift/lower circuit, steering circuit o r engine cooling fan cir- cuit. Once the faulty system has been i dentified, p ...

  • Toro 30874 - page 86

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 46 T raction Circuit Charge Pre ssure (Using Pressure Gauge) PRESSURE GAUGE 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV0 9 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 C2 TS RV S5 T2 FRONT LEFT FRONT RIGHT REAR L ...

  • Toro 30874 - page 87

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 47 NOTE: T h et r a c t i o nc h a r g ec i r c u i ti sd e s i g n e dt or e - place loss of hydraulic fluid fro m the closed loop traction circuit. Procedure for T raction Circuit Charge Pr essure Te s t CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, ...

  • Toro 30874 - page 88

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 48 T raction Circuit Relief Pr essure (Using Pressure Gauge) FORW ARD DIRECTION TEST SHOWN PRESSURE GAUGE 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 C2 TS RV S5 T2 ...

  • Toro 30874 - page 89

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 49 Procedure for T raction Circuit Relief Pressure Te s t CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, CAUTIONS and Pre - cautions for Hydraulic T esting at the beginning of this section. 1. Make sure hydrau lic oil is at normal operating te m- perat ...

  • Toro 30874 - page 90

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 50 Reverse T raction Circuit Reducing V alve (PR) Pressure (Using Pressu re Gauge) 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 C2 TS RV S5 T2 FRONT LEFT FRONT RIGHT ...

  • Toro 30874 - page 91

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 51 Procedure for Revers e T raction Circuit Reducing Va l v e ( P R ) P r e s s u r e Te s t NOTE: When in reverse, pressure reducing valve (P R) limits the pressure to the rear axle motor to 450 PSI (31 bar) so the rear wheels will no t scuff the t urf. CAUTION Prevent personal injury ...

  • Toro 30874 - page 92

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 52 Rear T raction Circuit Re lief (R V) Pressure (Us ing Pressure Gauge) PRESSURE GAUGE 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV0 9 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 C2 TS RV S5 T2 FRONT LEFT FRONT ...

  • Toro 30874 - page 93

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 53 Procedure for Rear T raction Circuit Relief V alve (R V) Pressure Te s t NOTE: Adjustable relief valve (RV) in the rear traction control manifo ld reduces rear axle motor pressure created in down hill, dynamic braking conditions to pre- vent rear wheel lock up. CAUTION Prevent person ...

  • Toro 30874 - page 94

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 54 Piston (T raction) Pump Flow (Using T ester with Pressur e Gauge & Flow Mete r) TESTER 4350 PSI 250 PSI 5 000 PSI EU - - 2600 / 1200 RPM 0.56 CID 0.56 CID 1.03 CID 1.03 CID 2.75 CID 50 PSI ENGINE T4 - - 2700 / 1200 RPM PISTON PUMP FROM REAR TRACTION MANIFOLD REAR DECK & COOLI ...

  • Toro 30874 - page 95

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 55 Procedure for Piston (T raction) Pump Flow Te s t This test me asures pisto n (tractio n) pump ou tput (flow) . During this tes t, pump load is creat ed at the flow meter using the adjustable loa d v alve on the tester . NOTE: Before perfor ming piston pum p flow test, make sure that ...

  • Toro 30874 - page 96

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 56 Cutting Deck Circuit Pressure (Using Pressu re Gauge) DECKS 1 AND 4 SHOWN TEST FO R GM4500 - - D PRESSURE GAUGE 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 RV0 9 T2 FRONT LEFT FRONT RIGHT REAR LEFT RV8 4350 PSI 30.5 GPM 250 PSI 5 ...

  • Toro 30874 - page 97

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 57 Procedure for Cutting Deck Circuit Pressure Te s t CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, CAUTIONS and Pre - cautions for Hydraulic T esting at the beginning of this section. 1. Make sure hydrau lic oil is at normal operating te m- perature ...

  • Toro 30874 - page 98

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 58 Cutting Deck Circuit Relief Pre ssure (Using T ester with Pressure Ga uge & Flow Meter) SECOND PUMP SECTION SHOWN TEST F OR GM4500 - - D TESTER 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 RV0 9 T2 FRONT LEFT FRONT RIGHT REAR ...

  • Toro 30874 - page 99

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 59 Procedure for Cutting Deck Cir cuit Relief Pressure Te s t CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, CAUTIONS and Pre - cautions for Hydraulic T esting at the beginning of this section. 1. Make sure hydrau lic oil is at normal operating te m- p ...

  • Toro 30874 - page 100

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 60 Deck Motor Case Drain Leakage (Usin g T es ter with Pressure Gauge & Flow Meter) MEASURING CONT AINER DECK MOTOR #1 SHOWN TEST FOR GM4500 - - D TESTER STEEL CAP 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 RV0 9 T2 FRONT LEFT FRONT RIGHT REAR LEFT ...

  • Toro 30874 - page 101

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 61 Procedure for Deck Motor Case Dr ain Leakage Te s t NOTE: Over a period of time, a de ck motor can wear in- ternally . A worn motor may bypass oil to its case drain causing the motor to be less efficien t. Eventually , enough oil loss will cause the deck motor to stall under heavy cu ...

  • Toro 30874 - page 102

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 62 Steering Cir cuit Relief Pressure (Us ing Pressure Gauge) (STEERING WHEEL TURNED TEST FOR GM4500 - - D SHOWN FOR RIGHT TURN) CAP STEEL PRESSURE GAUGE 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV FD P ...

  • Toro 30874 - page 103

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 63 Procedure for Steering Circuit Relief Pressure Te s t The steering circuit relief pressure test shou ld be per- formed to make sure that the ste ering circuit relief pres- sure is correct. CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, CAUTIONS and ...

  • Toro 30874 - page 104

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 64 Steeri ng Cylinder Inter nal Leakage 1050 PE T R STEERING CYLINDER 6.1 CIR L CONTROL VA LV E STEERING PSI FROM COMBINA TION MANIFOLD TO GEAR CYLINDER FULL Y EXTEN DED LOOK FOR LEAKAGE STEEL CAP STEERING WHEEL TURNED FOR RIGHT TURN PUMP INLET TO TR ACTION CHARGE CIRCUIT ...

  • Toro 30874 - page 105

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 65 The steering cy linder intern al leakage test should be performed if a steering problem is identified. This test will determine if the steering cylinder is faulty . Procedure for Steering Cylinder Inter nal Leakage Te s t NOTE: Steering circuit operat ion will be affected by rear tir ...

  • Toro 30874 - page 106

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 66 Lift/Lower Circuit Relief Press ure (Using P ressure Gauge) GM 4500 - - D SHOWN PRESSURE GAUGE 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV0 9 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 C2 TS RV S5 T2 FRONT L ...

  • Toro 30874 - page 107

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 67 Procedure for Lift/Lower Circuit Relief Pressure Te s t The lift/lower circuit relief pressure test should be per- formed to make sure that the cutting unit lift and lower circuit relief pressure is correct. CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARN ...

  • Toro 30874 - page 108

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 68 Engine Cool ing Fan Circuit (Using Pr essure Gauge and Phototac) GM 4500 - - D SHOWN PRESSURE GAUGE 1050 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV0 9 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 C2 TS RV S5 T2 FR ...

  • Toro 30874 - page 109

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 69 Procedure for Engine Cooling Fan Circuit T est The engine cooling fan circui t test should be performed to make sure that the engine cooling fan circuit has the correct system pressure and fan speed. CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, CA ...

  • Toro 30874 - page 110

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 70 Gear Pump Flow (Using T ester with Pressure Gauge & Flow Meter) SECOND GEAR PUMP SECTION TESTER 4350 PSI 250 PSI 5000 PSI EU - - 2600 / 1200 RPM 0.56 CID 0.56 CID 1.03 CID 1.03 CID 2.75 CID 50 PSI ENGINE T4 - - 2700 / 1200 RPM PISTON PUMP FROM REAR TRACTI ON V AL VE REAR DECK &am ...

  • Toro 30874 - page 111

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 71 Procedure for Gear Pump Flow Te s t CAUTION Prevent personal injury and/or damage to equip- ment. Read all W ARNINGS, CAUTIONS and Pre - cautions for Hydraulic T esting at the beginning of this section. 1. Make sure hydrau lic oil is at normal operating te m- perature by operating th ...

  • Toro 30874 - page 112

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 72 Adjustments Adjust Control Ma nifold Relie f V alves Several of the hydraulic control manifolds on your Groundsmaster include a djustable relief valves. The fol- lowing procedure can be used to adjust th ese r elief valves. Refer to the T es ting section of this chapter for in- forma ...

  • Toro 30874 - page 113

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 73 Service and Repairs General Precautions for R emoving and In stalling Hydraulic System Components Before Repair or Re placement of Components 1. Before removing any pa r ts from the hydraulic sys- tem, park machine on a level surface, engage parking brake, lower cutting decks and sto ...

  • Toro 30874 - page 114

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 74 Check Hydraulic Li nes and Hoses W ARNING Keep body and hands away from pin hole leaks or nozzles that eject hydraulic fluid under high pressure. Use pape r or cardboard, not hands, to search fo r leaks. Hydraulic f luid escapi ng und er pressure can h ave suff icient fo rce to pene ...

  • Toro 30874 - page 115

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 75 Flush Hydraulic Sy stem IMPORT ANT : Flush the hydraulic system any time there is a severe com p onent failure or the system is contaminated (oil appear s milky , black or contains metal particles). IMPORT ANT : Flush hydraulic s ystem when chang - Ing from petroleum base hydraulic f ...

  • Toro 30874 - page 116

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 76 Filtering Closed - - Loop T raction Circuit Filtering of a closed - - loop hydraulic system after a major component failure ( e.g. traction (piston) pump, front wheel motor o r rear axle mot or) is a req uiremen t to pre- vent debris from transmitting throughout the syst em. If a clo ...

  • Toro 30874 - page 117

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 77 Charge Hydraul ic System NOTE: When initially starting the hydraulic syst em with new or rebuilt compon ents such as pumps, motors or lift cylinders, it is important that the hydraulic system be charged properly . Air must be purged from the system and its components to re duce the c ...

  • Toro 30874 - page 118

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 78 Gear Pump 1. Piston pump assembly 2. Flat washer (4 used) 3. Gear pump assembly 4. 90 o hydraulic fitting (2 used) 5. 90 o hydraulic fitting (2 used) 6. 90 o hydraulic fitting 7. O - - ring 8. Hydraulic tee fitting 9. 90 o hydraulic fitting 10. 45 o hydraulic fitt ing 11 . S t r a i ...

  • Toro 30874 - page 119

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 79 Removal (Fig. 63) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Gain access to gear p ump from below the machine. 3. Drain the hydra ulic reservoir into a suitable conta iner (see Hydraulic Re ...

  • Toro 30874 - page 120

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 80 5. Remove caps and pl ugs from hydraulic lines and fit- tings. Install hydraulic lines to gear pump (see Hydraulic Hose and Tube Installation in the General Information section of this chapter). 6. Replace hydraulic oil filter and fill hydraulic reservoi r with new hydraulic oil. 7. ...

  • Toro 30874 - page 121

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 81 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 122

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 82 Gear Pump Se rvice 1. Dust seal 2. Retaining ring 3. Flange washer 4. Shaft seal 5. Front cover 6. Dowel pin (16 used) 7. Pressure seal 8. Back - - up gasket 9. Thrus t plate (8 use d) 10. Seal (8 used) 1 1. Idler gear 12. Drive shaft 13. Back - - up gasket 14. Pressure seal 15. Fron ...

  • Toro 30874 - page 123

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 83 IMPORT ANT : Use caution when clamping gear pump in a vise to avoid distorting any pump compo- nents . 3 . S e c u r et h e f r o n tc o v e ro ft h ep u m pi nav i s ew i t ht h e drive shaft pointing down. 4. Loosen the four (4) cap screws that secu re pump as- sembly . 5. Remove p ...

  • Toro 30874 - page 124

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 84 Piston (T raction) Pump Figure 68 FRONT RIGHT 1. Piston pump assembly 2. Flat washer (4 used) 3. Gear pump assembly 4. 90 o hydraulic fitting (2 used) 5. 90 o hydraulic fitting (2 used) 6. 90 o hydraulic fitting 7. O - - ring 8. Hydraulic tee fitting 9. 90 o hydraulic fitting 10. 45 ...

  • Toro 30874 - page 125

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 85 5. For assembly purposes, l abel all hydraulic lines con- n e c t e dt og e a rp u m pa n dt r a c t i o np u m pf i t t i n g s . 6. Put a drain pan be low the pump assembly . Remove hydraulic hoses connected to piston and gear pumps. Put plugs or caps on di sconnected hydraulic hos ...

  • Toro 30874 - page 126

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 86 IMPORT ANT : A case drain exists in the piston (trac- tion) pump and a suction port is near the input shaft of the gear pump (Fig. 70). Before the gear pump is installed to the piston pump, make sure tha t plugs placed in both of t hese ports are remove d. Failure to remove plugs wi ...

  • Toro 30874 - page 127

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 87 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 128

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 88 Piston (T raction) Pump Service Figure 72 2 3 6 8 9 10 11 13 1 5 7 12 14 15 16 17 18 19 20 4 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 2 3 10 7 25 10 29 33 34 36 37 38 39 40 41 46 47 42 43 48 49 44 45 41 42 42 55 42 44 45 46 50 51 52 53 10 54 ...

  • Toro 30874 - page 129

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 89 1. Scre en (2 used ) 2. Plug with O - - ring (2 used) 3. Plug with O - - ring (2 used) 4. Cylinder block assembly 5. V a lve plat e 6. Serv o piston 7. Scre w (4 used ) 8 . O r i f i c e( 2u s e d ) 9. Scre w (4 used ) 10. Plug with O - - ring (4 used) 1 1. Screw (2 used) 12. Plug 13 ...

  • Toro 30874 - page 130

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 90 Rear T raction Control Manifold 1. Rear traction control manifold 2. Cap screw (2 used) 3. Flange nut (2 used) 4. HI/LOW range control manifo ld 5. Lift circuit junction manifold 6. Hydraulic tube 7. O - - ring 8. Hydraulic straight fitting 9. O - - ring 10. Hydraulic tube 11 . O - - ...

  • Toro 30874 - page 131

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 91 Removal (Fig. 73) NOTE: The ports on the rear tra ction control manifold are marked for easy identification of components. Refer to the Hydraulic Schematics in Chapter 9 - - Foldout Drawings to identify the function of the hydraulic lines and cartridge valves at eac h port. 1. Read t ...

  • Toro 30874 - page 132

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 92 Rear T raction Co ntrol Manifo ld Service 1. Rear traction manifold body 2. Relief valve (port RV) 3. Pressure reducing valve (port PR) 4. #4 ze ro leak p lug wi th O - - ri ng 5. #6 ze ro leak p lug wi th O - - ri ng 6. Check valve (port CV) 7. Orifice (0.050) (port OR1) Figure 74 2 ...

  • Toro 30874 - page 133

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 93 Control Manifold Cartr idge V alve Service 1. Make sure the contr ol manifold is clean before re- moving the cartridge val ve from the control manifold. 2. If cartr idge valve is solenoid ope rated, remove nut securing solenoid coil to th e cartridge valve. Carefully s l i d ec o i l ...

  • Toro 30874 - page 134

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 94 HI/LOW Range Control Manifold 1. HI/LOW range control manifo ld 2. Cap screw (2 used) 3. Flange nut (2 used) 4. Rear traction control manifold 5. Lift circuit junction manifold 6. Hydraulic tube 7. O - - ring 8. Hydraulic tube 9. O - - ring 10. Hydraulic tube 11 . O - - r i n g 12. O ...

  • Toro 30874 - page 135

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 95 Removal (Fig. 75) 1. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and Repairs section of this chapter . 2. T o prevent contamination of hydraulic system during manifold removal, th oroughly clean exterior of ...

  • Toro 30874 - page 136

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 96 Rear Axle Motor 1. Rear axle motor 2. O - - ring 3. Pinion gear 4. External snap ring (2 used) 5. O - - ring 6. Hydraulic fitting 7. O - - ring 8. 90 o hydraulic fitting 9. Cap s crew (2 used ) 10. Flat was her (2 us ed) 11 . O - - r i n g 12. 90 o hydraulic fitt ing 13. O - - rin g ...

  • Toro 30874 - page 137

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 97 Removal (Fig. 78) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and Rep ...

  • Toro 30874 - page 138

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 98 Front Wheel Motors 1. Flange head screw (6 per planetary) 2. Splined brake shaft 3. Planetary assembly 4. Wheel assembly 5. Lug nut (8 per wheel) 6. Retaining ring 7. Spring plate 8. Compression spring 9. Jam nu t 10. Brake assembly (LH shown) 1 1. Flange head screw (4 per brake) 12. ...

  • Toro 30874 - page 139

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 99 7. Remove and discard O - - ring (item 16) from flange of wheel motor . 8. If hydrauli c fittings are to be removed from wheel mo- tor , mark fitting orientation to allow correct assembly (Figs. 80 and 81). Remove fittings from motor and dis- card O - - rings. Installation (Fig. 79) ...

  • Toro 30874 - page 140

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 100 Rear Axle and Front Wheel Motor Service Figure 82 2 3 6 8 9 10 11 13 1 5 7 12 14 15 16 17 18 19 20 4 21 22 23 21 25 1. Plu g with O - - ring 2. Minimum angle stop 3. Bias spring 4. Serv o piston 5. O - - ring 6. O - - ring 7. Socket head screw (5 used) 8. Endcap 9. Dowel 10. D owel ...

  • Toro 30874 - page 141

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 01 NOTE: The fr ont whee l motors a re ident ical (shown in Figure 82). The rear axle motor inclu des a flushing valve for cooling of the closed loop traction ci rcuit and there- fore has some dif ferences from the front motors (Fig. 83). Service of the wheel and axle motors uses the ...

  • Toro 30874 - page 142

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 102 Cutting Deck Motor The hydraulic motors used on all cutting decks are the same. Removal 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Read the Gener al Precautions for Remo ving and Installing ...

  • Toro 30874 - page 143

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 03 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 144

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 104 Cutting Deck Motor Service 1. Dust seal (2 used) 2. Retaining ring 3. Flange washer 4. Shaft seal 5. Front flange 6. Pressure seal 7. Backup gasket 8. Front wear plate 9. Drive gear 10. Dowel pin (4 used) 1 1. Idler gear 12. O - - rin g 13. Bod y 14. Rear wear plate 15. Rear c over ...

  • Toro 30874 - page 145

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 05 5. Remove motor from the vise. T urn motor so that the shaft end is facing down. Rem ove cap screws. 6. Separate rear cove r from body . Lift rear co ver from motor . 7. Carefully remove bo dy . Lift body str aight up to re- move. Make sure the rear wear plate remains on the drive ...

  • Toro 30874 - page 146

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 106 Assembly (Fig. 86) NOTE: When assembling t he motor , check the ma rker line on each part to make sure the parts are properly aligned during assembly . 1. Lubricate O- - rings, pressure seals, ba ck - - up gaskets and wear plat e grooves with a thin coat of p etroleum jel- ly . Lub ...

  • Toro 30874 - page 147

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 07 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 148

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 108 Deck Control Manifold 1. Deck control manifold 2. Filter mount bracket 3. Flange head screw (2 used) 4. Hydraulic oil filter assembly 5. V alve mount bracket 6. Flange head screw (2 used) 7. Lift control manifold 8. Flange head screw (2 used) 9. Fan dr ive manifo ld Figure 90 FRONT ...

  • Toro 30874 - page 149

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 09 Removal (Fig. 90) NOTE: The ports on the deck control manifold are marked for easy identification of components. Example: P1 is the gear pump connection port (see Hydraulic Schematics in Chap ter 9 - - Foldout Drawin gs to identify the function of the hydraulic line s and cartridge ...

  • Toro 30874 - page 150

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 10 Deck Control Man ifold Service (GM 4500 - - D) 1. Manifold body 2. Proportional relief (PRV1 & PRV2) 3. Solenoid coil 4. Relief valve (RV8 & RV9) 5. Logic valve (LC1 & LC2) 6. Pilot piston 7. Nut 8. Zero leak plug (#6) 9. Zero leak plug (#8) Figure 93 1 3 4 5 6 7 9 8 2 ...

  • Toro 30874 - page 151

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 1 1 NOTE: The deck control manifol d uses several zer o leak plugs. These plugs have a tapered sealing sur face on the plug head that is designed to resist vibrati on in- duced plug loo sening. The zero leak plu gs also have an O - - ring a s a secondary seal. If zero leak plug remova ...

  • Toro 30874 - page 152

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 12 Deck Control Man ifold Service (GM 4700 - - D) 1. Manifold body 2. Nut (4 used) 3. Zero leak plug (#6) 4. Zero leak plug (#8) 5. Zero leak plug (#4) 6. Propor tional r elief ( PRV2 & PRV2) 7. Relief valve (R V8, RV9, RV10 & RV1 1) 8. Solenoid valve (SV1 & SV2) 9. Logic ...

  • Toro 30874 - page 153

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 13 For solenoid and control valve service procedures, se e Control Manifold Cartridge V alve Service in this section. Refer to Figures 95 and 96 for cartridge valve and plug installation torque. IMPORT ANT : A pilot piston (item 6) is placed be- neath e ach of t he relief v alves in d ...

  • Toro 30874 - page 154

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 14 Steering Contro l V alve 1. Steering wheel cover 2. Lock nut 3. Steering wheel 4. Flat washer 5. Socket head screw (4 used) 6. Flange head screw (4 used) 7. Steering column 8. Steering control valve 9. Socket head screw (4 used) 10. Flange nut (4 used) 1 1. Tinne rman nut (4 used) ...

  • Toro 30874 - page 155

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 15 CAUTION Before open ing hydraul ic system, operat e all hy - draulic controls to relieve sy stem pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen- eral Information se ction of this chapter . 8. Disconnect hydraulic lines f ...

  • Toro 30874 - page 156

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 16 Steering Contro l V alve Service 1. Relief valve assembly 2. Dust seal ring 3. Steering valve housing 4. Shaft seal 5. Thrust washer 6. Bearing race 7. Ring 8. Spring set 9. Cro ss pin 10. Sleeve 1 1. Spool 12. Car dan sh aft 13. O - - rin g 14. Distributor plate 15. Out er gear wh ...

  • Toro 30874 - page 157

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 17 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 158

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 18 Steer ing Cylinde r 1. Steering cylinder 2. Ball joint 3. Ball joint 4. Retaining ring 5. Grease fitting 6. Grease fitting 7. 90 o hydraulic fitting 8. O - - ring 9. O - - ring 10. Drive axle assembly 1 1. Ball joint spacer 12. Axle washer 13. Slotted hex nut 14. Cot ter pi n 15. H ...

  • Toro 30874 - page 159

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 19 Removal (Fig. 101) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and ...

  • Toro 30874 - page 160

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 120 Steering Cylinder Service 1. T ube assembly 2. Lock nut 3. Seal 4. O - - r ing 5. O - - r ing 6. Pisto n 7. O - - ring 8. Back - - up seal 9. Seal 10. Head 11 . W i p e r 12. Retaining ring 13. Rod assembly Figure 102 7 10 4 11 8 5 1 6 3 9 2 12 13 7 10 4 11 8 5 1 6 3 9 2 12 13 30 t ...

  • Toro 30874 - page 161

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 21 Disassembly (Fig. 102) 1. Remove oil from steering cylinder into a drain pan by slowly pumping the cylin der shaft. Plug both ports and clean the outside of the cyl inder . IMPORT ANT : Prevent damage when clamping the cylinder in a vise; clamp on the clevis only . Do not close vis ...

  • Toro 30874 - page 162

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 122 Engine Cooling Fan Motor 1. Cap screw (4 used) 2. Fan 3. Flange head screw (4 used) 4. Flange nut (4 used) 5. Fan motor and bracket assembly 6. Flange head screw (8 used) 7. Flat washer (8 used) 8. R - - clamp ( 2 used) 9. Radiator/oil cooler assembly 10. Air intake hose 11 . W a s ...

  • Toro 30874 - page 163

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 23 Removal (Fig. 103) 1. Park machine on a level s urface, lower cu tting decks, stop engine, apply parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and R ...

  • Toro 30874 - page 164

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 124 Installation (Fig. 103) 1. If fittings were removed fro m fan motor , lubricate an d place new O- - rings onto fittin gs. Install fittings into port openings. T ighten fittings (see Hydraul ic Fitting Installa- tion in the General Information sectio n of t his chapter). 2. Secure f ...

  • Toro 30874 - page 165

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 25 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 166

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 126 Engine Cooling Fan Motor S ervice 1. Flange washer 2. O - - ring 3. Front flange 4. Dust seal 5. Retaining ring 6. Front wear plate 7. Shaf t seal 8. Backup gasket 9. Pressure seal 10. Rear wear plate 11 . B o d y 12. Idler gear 13. Cap sc rew ( 4 used) 14. Dowel (2 used) 15. Dri v ...

  • Toro 30874 - page 167

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 27 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 168

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 128 Fan Control Manifold 1. Fan control manifold 2. Support bracket 3. Flange head screw (2 used) 4. Battery support 5. Air cleaner mount 6. Deck manifold (GM 4500 - - D shown) 7. Hydraulic hose 8. Hydraulic hose 9. Hydraulic tube 10. Hydraulic tube 1 1. Hydraulic tube 12. Hydraulic tu ...

  • Toro 30874 - page 169

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 29 Removal (Fig. 107) NOTE: The ports on the fan cont rol manifold are marked for easy identification of components. Example: P1 is the gear pump connection port (see Hydraulic Schematics in Chap ter 9 - - Foldout Drawin gs to identify the function of the hydraulic line s and cartridg ...

  • Toro 30874 - page 170

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 130 Fan Control M anifold Service 1. Manifold body 2. Zero leak plug (#6) (3 used) 3. Zero leak plug (#4) (2 used) 4. Check valve (port CV) 5. Flow divider cartridge (port FD) 6. Solenoid coil (2 used) 7. Nut 8. Solenoid valve (port S 1) 9. Proportional relief cartridge (port TS) 10. N ...

  • Toro 30874 - page 171

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 31 This page is intentionally blank. Hydraulic System ...

  • Toro 30874 - page 172

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 132 Lift Control Manifold 1. Deck control manifold 2. Filter mount bracket 3. Flange head screw (2 used) 4. Hydraulic oil filter assembly 5. V alve mount bracket 6. Flange head screw (2 used) 7. Lift control manifold 8. Flange head screw (2 used) 9. Fan dr ive manifo ld Figure 1 10 FRO ...

  • Toro 30874 - page 173

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 33 Removal (Fig. 1 10) 1. Park machine on a level s urface, lower cu tting decks, stop engine, apply parking brake and remove key from the ignition switch . IMPORT ANT : T o prevent unexpected deck lower- ing, make sure that cutting decks a re fully lowered before loosening hydraulic ...

  • Toro 30874 - page 174

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 134 Lift Control Manifold Service (GM 4500 - - D) 1. Manifold body 2. Proportional relief valve (port TS) 3. Solenoid valve (port S6) 4. Solenoid coil (2 used) 5. Check valve (port CV) 6. Orifice (0.080) 7. Zero leak plug (#4) 8. Nut 9. Straigh t fitting 10. O - - rin g 11 . N u t 12. ...

  • Toro 30874 - page 175

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 35 NOTE: The lift control manifold includes sev eral zero leak plugs. These plugs have a tapered sealing sur face on the plug head that is designed to resist vibrati on in- duced plug loo sening. The zero leak plu gs also have an O - - ring a s a secondary seal. If zero leak plug remo ...

  • Toro 30874 - page 176

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 136 Lift Control Manifold Service (GM 4700 - - D) 1. Manifold body 2. Nut 3. Zero leak plug (#4) 4. Relief valve (port R1) 5. Proportional relief valve (port TS) 6. Solenoid valve (ports S2, S3, S7, S8) 7. Solenoid valve (port S1) 8. Solenoid valve (ports S4, S6, S9) 9. Solenoid valve ...

  • Toro 30874 - page 177

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 37 NOTE: The lift control manifold uses several zero l eak plugs. These plugs have a tapered sealing surface on t h ep l u gh e a dt h a ti sd e s i g n e dt or e s i s tv i b r a t i o ni n d u c e d plug loosening. The z ero leak plugs also have an O - - ring as a secondar y seal. I ...

  • Toro 30874 - page 178

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 138 Lift Circuit Junction Manifold 1. Lift circuit junction manifold 2. Flange head screw (2 used) 3. HI/LOW range control manifold 4. Rear traction control manifold Figure 1 16 FRONT RIGHT 2 3 1 4 ...

  • Toro 30874 - page 179

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 39 Removal (Fig. 1 16) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and ...

  • Toro 30874 - page 180

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 140 Lift Cylinders: Decks #1, #4 and #5 1. Lift arm (deck #4) 2. Flange nut 3. Lift arm (deck #1) 4. Cylinder pin (3 used) 5. Flange head screw 6. O - - ring 7. 90 o hydraulic fitting (2 per cylinder) 8. O - - ring 9. Lift arm (deck #5) 10. Lift cylinder (decks #4 and #5) 1 1. Lift cyl ...

  • Toro 30874 - page 181

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 41 Removal (Fig. 1 19) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and ...

  • Toro 30874 - page 182

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 142 Lift Cylinders: Decks #2 and #3 1. Flange head screw 2. Flange nut 3. Cylinder pin 4. Lift cylinder 5. Retaining ring 6. Cylinde r pin 7. Lift arm (deck #2) 8. Lift arm (deck #3) 9. O - - ring 10. Hydraulic fitting 11 . O - - r i n g 12. 90 o hydraulic fitting 13. Grease fitting Fi ...

  • Toro 30874 - page 183

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 43 Removal (Fig. 121) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and ...

  • Toro 30874 - page 184

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 144 Lift Cylinders: Decks #6 and #7 (GM 4700 - - D) 1. Lift cylinder 2. Lock nut (2 used per side) 3. Rear link 4. Link assembly 5. Plastic roller 6. Retaining ring 7. Cylinde r pin 8. 90 o hydraulic fitting 9. O - - ring 10. O - - rin g 1 1. Lift arm assembly (deck #6 sho wn) 12. Grea ...

  • Toro 30874 - page 185

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 45 Removal (Fig. 123) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and ...

  • Toro 30874 - page 186

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 146 Lift Cylinder Service 1. T ube assembly 2. Lock nut 3. Wear ring 4. Seal 5. Piston 6. O - - ring 7. O - - ring 8. Back - - up ring 9. Seal 10. Retaining ring 11 . H e a d 12. Wiper 13. Rod assembly 14. Grease fitting (2 used) Figure 125 12 10 9 5 7 4 2 3 11 1 8 6 13 14 10 5 2 11 6 ...

  • Toro 30874 - page 187

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 47 Disassembly (Fig. 125) 1. Remove oil fro m lift cylinder i nto a drain pan by slowly pumping th e cylinder s haft. Plug both ports and clean the outside of the cy linder . IMPORT ANT : Prevent damage when clamping the cylinder in a vise; clamp on the clevis only . Do not close vise ...

  • Toro 30874 - page 188

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 148 Hydraulic Reservoir 1. Plug 2. O - - ring 3. Dipstick 4. Breather 5. Screen filter 6. Hydraulic reservoir 7. Reservoir strainer 8. O - - ring 9. O - - ring 10. Straight hydraulic fitting 11 . O - - r i n g 12. Cap screw (2 used) 13. Flat was her (2 us ed) 14. Clamp ( 2 used) 15. Fl ...

  • Toro 30874 - page 189

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 49 Removal (Fig. 126) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Read the General Pre cautions for Removing an d Installing Hydraulic System Components at the begin- ning of the Service and ...

  • Toro 30874 - page 190

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 150 Radiator and Oil Cooler Assem bly 1. Radiator/oil cooler assembly 2. Cap screw (4 used) 3. W asher (4 used) 4. Fan 5. Plenum assembly 6. Cap screw (6 used) 7. Flange nut (6 used) 8. Air intake hose 9. Hose 10. Hose clamp (4 used) 1 1. Upper radiator shroud 12. Lower radiator shroud ...

  • Toro 30874 - page 191

    Groundsmaster 4500- - D/4700 - - D Hydraulic System Page 4 - - 1 51 NOTE: The hydra ulic oil cooler on y our Groundsm aster is combined with the radiator . See Radiator and Oil Cooler Assembly in the Service and Repairs section of Chapter 3 - - Diesel Engine for inform ation on removal and installation of th e radiator/oil cooler assembly . 1. Radi ...

  • Toro 30874 - page 192

    Groundsmaster 4500- - D/4700 - - D Hydraulic Syst em Page 4 - - 152 This page is intentionally blank. ...

  • Toro 30874 - page 193

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 Elec trical Sys tem Chapter 5 Electrical System T able o f Contents GENERAL INFORMA TION 2 ..................... Operator ’s Manu al 2 .......................... Electrical Drawings 2 .......................... T oro Electronic Co ntrollers (T EC) 2 ............. Y anmar Engine Electronic Control Un ...

  • Toro 30874 - page 194

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 2 Electrical Syste m General Information Operator ’ s Manual The Operator’s Manual provi des information reg arding the operation, general maintenance and maintenance intervals for your Ground smaster machine. Refer to the Operator ’s Manual for additional infor mation when ser- vicing the machine ...

  • Toro 30874 - page 195

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 3 Elec trical Sys tem Y anmar Engine Electr onic Control Unit (ECU) The Y anmar engine that powers the Groundsmaster 4500 - - D and 4700 - - D uses an electronic control u nit (ECU) for engine management and a lso t o communi- cate with the TEC controller s and the InfoCenter Display on the machi ne. Al ...

  • Toro 30874 - page 196

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 4 Electrical Syste m Y anmar Engine Electrical Components When servicing or troublesh ooting the engine electrical components, use the c orrect engine service manu a l and troubleshoo ting manual. Also , the Y anmar SMART- ASSIST - - Direct electronic control diagnostics ser vice system is available to ...

  • Toro 30874 - page 197

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 5 Elec trical Sys tem This page is intentionally blank. Electrical System ...

  • Toro 30874 - page 198

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 6 Electrical Syste m Special T ools Order special tools fro m your T oro distribut or . Some tools may also be available from a local supplier . Multimet er The multimeter can test ele ctrical components and cir- cuits for current ( amps), resistance (ohms) or voltage. Obtain this tool locally . NOTE: T ...

  • Toro 30874 - page 199

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 7 Elec trical Sys tem Battery Hydrometer Use the batter y hydrome ter when meas uring specific gravity of battery electrolyte. Obtain this tool loca lly . Figure 7 Electrical System ...

  • Toro 30874 - page 200

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 8 Electrical Syste m InfoCenter Display The InfoCenter Display us ed on your Groundsmaster is a LCD device that is located on the consol e. The Info- Center provides information f or the machine operator during machine operation, p rovides elec trical system diagnostic assistance for technicians an d al ...

  • Toro 30874 - page 201

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 9 Elec trical Sys tem Main Information Scr eens The two (2) InfoCenter main information scre ens (Figs. 10 and 1 1) are displayed after the initial splash screens have been displayed for several seconds. During nor- mal machine operation, the main i nformation screens provide machine informatio n for th ...

  • Toro 30874 - page 202

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 0 Electrical Syste m Main Menu Screen The main menu screen can be accessed from the Info- Center main informatio n or splash screen by pressing and releasing th e menu/back button (left button) on the display . Once to the main menu screen (Fig. 12), naviga- tion to the five (5) differ ent menu items ...

  • Toro 30874 - page 203

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 1 Electri cal System Service Screen The service scree n (Fig. 14 ) contains m achine oper a- tional information including hou rs and counts. V alues listed for these service menu items cannot be change d. If the mac hine PIN has be en entered t o allow access to protected menu item s in the settings s ...

  • Toro 30874 - page 204

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 2 Electrical Syste m Diagnos tics Scr een The diagnostics scr een (Fig. 15) list s the various st ates of machine electrical c omponents. The diagnostics screen should be used to check operation of machi ne controls and to ver ify that switches and cir cuit wir ing are functioning correctly . For each ...

  • Toro 30874 - page 205

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 13 E lectrical System Settings Screen The settings screen iden tifies the InfoCenter la nguage and decks (English or Metric). The settings screen also allows the operator to customize the backlight (bright- ness) and contrast settings f or the InfoCenter displa y . If either the backligh t (brigh tness) ...

  • Toro 30874 - page 206

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 4 Electrical Syste m About Screen The about scree n (Fig. 18) ide ntifies the ma chine model number , serial number and software revision s for the TEC controllers, InfoCenter and engine electroni c con- trol unit (if available). The about screen also lists the CAN - - bus status . Additional informat ...

  • Toro 30874 - page 207

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 15 E lectrical System T roubleshooting CAUTION Remove all jewelry , especially rings and watches, before doing any elec t rical trouble- shooting or testing. Disconnect the battery cables unless the tes t requires battery voltage. For effec tive troublesh ooting and repairs, there must be a good underst ...

  • Toro 30874 - page 208

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 6 Electrical Syste m Fault Codes The list below identifies the fault codes that are gener- ated by the TEC controller to identify an electrical sys- tem malfunction (fault) that occurred durin g machine operation. Use the InfoCenter Display f or fault retrieval. NOTE: The following list of fault codes ...

  • Toro 30874 - page 209

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 17 E lectrical System Fault Code Fault Description 33 Forward piston (traction) pump o utput has open or short to grou nd 34 Reverse piston (traction) pump output has open or short to ground 35 Reverse engine coolin g fan output has open o r short to ground 39 LH PTO outp ut has open or short to ground ...

  • Toro 30874 - page 210

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 1 8 Electrical Syste m Starting Probl ems NOTE: Check InfoCenter Display for possi ble operator advisories or faults whenever diag nosing machine elec- trical pr oblems. Problem Possible Causes No electrical power to machine (including gauges). Battery is discharged. Battery cab les are loose o r corrod ...

  • Toro 30874 - page 211

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 19 E lectrical System Starting Problems (c ontinued) Problem Possible Causes Engine cranks, bu t does not start. Fuel tank is empty . Engine is not c ranking fast enoug h. Fuel pump or circuit wir ing is faulty . Engine or fu el system is malfunction ing (see Y anmar Service Manua l). Starter cranks, bu ...

  • Toro 30874 - page 212

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 2 0 Electrical Syste m Cutting Deck Operatin g Problems NOTE: Check InfoCenter Display for possi ble operator advisories or faults whenever diag nosing machine elec- trical pr oblems. Problem Possible Causes Cutting decks run, but sho uld not, when raised. Decks shut off with PTO switch. The cutting dec ...

  • Toro 30874 - page 213

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 21 E lectrical System Cutting Deck Lift/Lower Problems NOTE: Check InfoCenter Display for possible operator advisories or faults whenever diagnosing machine elec- trical p roblems . NOTE: T ol o w e ra c u t t i n gd e c k ,t h eo p e r a t o rm u s tb ei n the operator seat and the t raction speed must ...

  • Toro 30874 - page 214

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 2 2 Electrical Syste m Cutting Deck Lift/Lower Problems (Continued) Problem Possible Causes On Groundsmaster 4700- - D, center cutting decks will not raise or lower , but bo th wing cutting decks w ill raise and lower . The center deck lift switch or circuit wiring is faulty . Fuse(s) for TEC con trolle ...

  • Toro 30874 - page 215

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 23 E lectrical System Electrical System Quick Checks Battery T est (Open Circuit T est) Use a multimeter to measure the voltage between th e battery terminals. Set multimeter to t he DC volts settin g. The batter y should be at a tempera ture of 60 o to 100 o F( 1 6 o to 38 o C). The ignition key sho ul ...

  • Toro 30874 - page 216

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 2 4 Electrical Syste m Adjustments T raction Pedal Adjustment The traction pedal includes a neutra l assembly that is used to adjust the traction neutral position (Fig. 19). T rac tion pedal adjus tment may be ne cessary to make sure that traction pe dal movement provides the correct full reverse and fu ...

  • Toro 30874 - page 217

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 25 E lectrical System 6. After any adju stment of the spring shaft and rod en d bearing, use the InfoCenter Displa y Diagnostics menu to obtain and se lect the Traction Pedal menu item (see InfoCenter Display in this ch apter). Ch oose Outp uts and the InfoCenter display will identify the traction pedal ...

  • Toro 30874 - page 218

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 2 6 Electrical Syste m T raction Pedal Position Sensor Calibration IMPORT ANT : A properly installed and calibrated traction pedal position sensor i s critical to accurate traction system respons e and for reliable sensor life. Use care when rem oving, installing and cali- brating the traction pedal pos ...

  • Toro 30874 - page 219

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 27 E lectrical System Component T esting For accurate resistance and/or continuity checks, elec- trically disconnect the c omponent being tested from the circuit (e.g. unplug the ig nition switch connector before checking continuity of the switch t erminals). NOTE: For engine component testing informati ...

  • Toro 30874 - page 220

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 2 8 Electrical Syste m Fuses Groundsmaster 4500 - - D and 4700 - - D use numerous fuses for circuit protection. The fuses reside in the power center behind the operator’s seat. Fuse Identification and Function (Fig. 27) Fuse A - - 1 (7.5 Amp) protects TEC - - 5002 output power supply for engine sta rt ...

  • Toro 30874 - page 221

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 29 E lectrical System Fusible Link Harnes s Y our Groundsmaster uses two (2) fusible links for circuit protection . These fusible links ar e located in a har ness that connects the starter B+ terminal to the wire harness (Fig. 28). If either of these links should fail, current to the protected circuits ...

  • Toro 30874 - page 222

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 3 0 Electrical Syste m PTO Switch The two position P TO switch is located on the console arm (Fig. 30). The PT O switch is pulled up to engage the PT O and pushed in to d isengage the PTO. NOTE: T o engage the PT O, the seat has to be occu- pied, traction s peed has to be in low range (mow) and t h ec u ...

  • Toro 30874 - page 223

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 31 E lectrical System Hi/Low Speed, Engine Speed Request and Cutting Deck Lift Switches The Hi/Low speed, engine spee d request and cutting deck lift switches are all identical. These switches are located on the console arm (Fig. 32). The Hi/Low speed switch is used as an input for the TEC controller to ...

  • Toro 30874 - page 224

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 3 2 Electrical Syste m Headlight Switch The headlight switch is locate d on the operator side of the console arm (Fig. 34). This two (2) position rocker switch allows the headl ights to be turned on and off. T esting 1. Park machine on a level surface, lower cutting decks, engage parking brake and stop ...

  • Toro 30874 - page 225

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 33 E lectrical System Seat Switch The seat switch is normally open and closes wh en the operator is on the se at. The seat switch and its electrica l connector are located i n the seat assembly . If the trac- tion system or PT O switch is engaged whe n the operator raises out of the seat , an opera tor ...

  • Toro 30874 - page 226

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 3 4 Electrical Syste m Parking Brake Switch The parking brake switch is a normally open pr oximity switch. The parking brake sw itch is attached to the bot - tom of the RH brake pedal (Fig. 37) . When the par king brake is not ap plied, the parking br ake detent is positioned near the target end of the ...

  • Toro 30874 - page 227

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 35 E lectrical System Cutting Deck Position Switches The cutting deck positi on switches are normally o pen proximity switches that are located on the tra ction unit frame (Fig. 39). The sensing pl ate is located on the cut- ting deck lift ar m. The Groundsmaster 4500 - - D uses two (2) cutting de ck po ...

  • Toro 30874 - page 228

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 3 6 Electrical Syste m Relays with Four (4) T erminals Y our Groundsmaster uses a number of el ectrical relays that have four (4) terminals. A tag near the wire harn ess relay connector can be used t o identify each relay . The main power relay is used to provide curr ent to most of the fuse protected c ...

  • Toro 30874 - page 229

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 37 E lectrical System 6. Connect multimeter (ohms setting ) leads to relay ter- minals 30 and 87. Ground terminal 86 an d apply +12 VDC to terminal 8 5 . The relay shoul d make and break continuity betwe en terminals 30 an d 87 as +12 VDC is applied and remove d from terminal 85. 7. Disconnect voltage a ...

  • Toro 30874 - page 230

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 3 8 Electrical Syste m Relays with Five (5) T erminals Y our Groundsmaster uses a number of el ectrical relays that have five (5 ) termin als. A tag near the wire ha rness relay connector can be used t o identify each relay . The main relay is used on models 30873 and 30874 to provide current for severa ...

  • Toro 30874 - page 231

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 39 E lectrical System T raction Pedal Positi on Sensor The traction pedal position sensor is connected to the traction peda l assembly (Fig. 46). This position s ensor determines the neutra l band for the tra ction pedal, the direction of travel des ired by the operator and the trac- tion speed. The pos ...

  • Toro 30874 - page 232

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 4 0 Electrical Syste m T oro Electronic Controllers (TEC) Groundsmaster 4500 - - D and 4700 - - D machines use a T oro Electronic Contro ller ( TEC - - 5002) to control electri- cal system operation. Groundsmaster 4700 - - D ma- chines use an additional TEC - - 5001 controller for electrical control of ...

  • Toro 30874 - page 233

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 41 E lectrical System The connection termin al functions for the TEC control- lers are shown in F igures 48 (T EC - - 5002) an d 49 (TEC - - 5001). Note that electrical po wer for controller outputs is provided through three (3) connector termin- als (PWR 2, PWR 3 and PWR 4) each protected with a 7.5 am ...

  • Toro 30874 - page 234

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 4 2 Electrical Syste m Hydraulic Solenoid V alve Coils Figure 51 1. Deck c ontr ol manif old 2. Lift control manifold 3. Fan control manifo ld 4. HI/LOW range control manifold 1 4 3 2 FRONT RIGHT GROUNDSMASTER 4500 - - D SHOWN Numerous hydraulic solenoid valve coils are used on the hydraulic control ma ...

  • Toro 30874 - page 235

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 43 E lectrical System Solenoid Coil T esting 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Locate hydraulic solenoid valve coil to be tested (Fig. 51). 3. Disconnect wire har ness conn ector from solen oid valve ...

  • Toro 30874 - page 236

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 4 4 Electrical Syste m Piston (T raction) Pump Contr ol Solenoid Coils The piston (tract ion) pump us es an electronic contr ol as- sembly for swash plate rotation. Electrical outputs from the machine TEC controlle r are provided to two (2) solenoid coils for pump control. The piston pump control assemb ...

  • Toro 30874 - page 237

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 45 E lectrical System Hydraulic Oil T emperature Sender A temperature sender is used as an input for the TEC controller to identify if the hyd r aulic oil temp erature has reached an excessive level. Th e hydraulic oil tempera- ture sender is attached to the rear axle motor at the rear of the machine (F ...

  • Toro 30874 - page 238

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 4 6 Electrical Syste m Fuel Pump (Models 30873 and 30874) The fuel pump i s attached to th e air cleaner m ount below the fuel water separator (Fig. 5 7). Operational T est 1. Park machine on a level surface, lower cutting decks, stop engine and apply parking brake. Raise hood to access fuel pump. 2. Di ...

  • Toro 30874 - page 239

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 47 E lectrical System Fuel Pump (Models 30881 and 30882) The fuel pump is attached to the air clean er mount below the fuel water se parator (Fig. 58). Operatio nal T es t 1. Park machine on a level s urface, lower cu tting decks, stop engine and apply parking brake. Raise hood to access fu el pump. 2. ...

  • Toro 30874 - page 240

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 4 8 Electrical Syste m CAN - - bus T e rmination Resistor System communication between electri cal components on Groundsmaster 4500 - - D and 4700 - - D machines is accomplished on a CAN - - bus communication system. T wo (2) specially designed, twisted cables form the bus for the network used on the ma ...

  • Toro 30874 - page 241

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 49 E lectrical System Diode Assemblies The Groundsmaster engi ne wire harness contains a diode assembly that is u sed for circuit protection fro m voltage spikes whe n the engine starter solenoid is de - - energized. This di ode assembly plugs into the en gine wire harness near the eng ine starter motor ...

  • Toro 30874 - page 242

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 5 0 Electrical Syste m Service and Repairs NOTE: For engine compone nt repair informati on (e.g. starter mo tor), re fer to the Y anmar Se rvice M anual that is correct for your G r oundsmaster model. Battery Care 1. The top of the b attery mus t be kept clean. lf the ma- chine is stored in a location w ...

  • Toro 30874 - page 243

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 51 E lectrical System Battery Service The battery is the heart of the electrical system. With regular and proper service, batter y life can be extended. Additionally , battery and electrical component failure c a nb ep r e v e n t e d . CAUTION When working with batt eries, use extreme cau- tion to avoi ...

  • Toro 30874 - page 244

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 5 2 Electrical Syste m Battery T esting 1. Conduct a hydr ometer tes t of the battery elect rolyte. IMPORT ANT : Make sure the area around the cells is clean before opening the batter y caps. A. Measure the specific gravity of each cell with a hydrometer . Draw electrolyte in and out of the hydrometer b ...

  • Toro 30874 - page 245

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 53 E lectrical System Battery Charging T o minimize possible damage to the battery and allow the battery to be fully charged, the slow ch arging meth- od is presented here. This charging me thod can be ac- complishe d with a constan t current bat tery charg er which is available in most loca tions. CAUT ...

  • Toro 30874 - page 246

    Groundsmaster 4500- - D/4700 - - D Page 5 - - 5 4 Electrical Syste m This page is intentionally blank. ...

  • Toro 30874 - page 247

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 Ax les, Planetarie s and Brakes Chapter 6 Axles, Planetaries and Brakes T able o f Contents SPECIFICA TIONS 2 ............................ GENERAL INFORMA TION 3 ..................... Operator ’s Manu al 3 .......................... ADJUSTMENTS 4 .............................. Planetary Wheel D rive ...

  • Toro 30874 - page 248

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 2 Axles, Planetaries and Brakes Specifications Item Specification T ire pressure (front and rear) 20 psi (138 kPa) Rear wheel toe - - in 0 . 1 2 5i n( 3m m ) Wheel lug nut torqu e (front and rear) 85 to 100 ft- -lb (1 16 to 135 N - -m) Steering cylinder bolt torque 100 to 125 ft - -lb (136 to 169 N - - ...

  • Toro 30874 - page 249

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 3 Ax les, Planetarie s and Brakes General Information Operator ’ s Manual The T raction Unit Operator ’s Manual provides informa- tion regarding th e operation, gen eral maintenan ce and maintenance intervals for your Groundsmaster ma- chine. Refer t o this publicat ion for additio nal informa tion ...

  • Toro 30874 - page 250

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 4 Axles, Planetaries and Brakes Adjustments Planetary Wheel Drive End Play A front planetary wheel drive assembly that is properly operating should have no en dplay . Any endplay in a planetary assembly indicates tha t t here are potential problems with the planetary . Check planetary endplay at interva ...

  • Toro 30874 - page 251

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 5 Ax les, Planetarie s and Brakes This page is intentionally blank. Axles, Planetaries and Brakes ...

  • Toro 30874 - page 252

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 6 Axles, Planetaries and Brakes Service and Repairs Brake Assembly 1. Flange head screw (6 per planetary) 2. Splined brake shaft 3. Planetary assembly (2 used) 4. Front wheel assembly (2 used) 5. Lug nut (8 per wheel) 6. Retaining ring 7. Spring plate 8. Compression spring 9. Jam nu t 10. Brake assembly ...

  • Toro 30874 - page 253

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 7 Ax les, Planetarie s and Brakes Brake Assembly Rem oval (Fig. 1) 1. Park machine on a level surface and raise cut ting decks to allow easier access to front brake assembly . Stop engine, engage parking brake and remove key from the ignition s witch. 2. Drain oil from planetary wheel drive/bra k e asse ...

  • Toro 30874 - page 254

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 8 Axles, Planetaries and Brakes 4. Install flange he ad screws (item 1 1) to secure brake assembly to frame. Tighte n screws in a crossing pattern to a torque from 75 to 85 ft - - lb (102 to 1 16 N - - m) . 5. Install brake cabl e to pull rod on brake assembly . Brake cable end should be compl etely thr ...

  • Toro 30874 - page 255

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 9 Ax les, Planetarie s and Brakes This page is intentionally blank. Axles, Planetaries and Brakes ...

  • Toro 30874 - page 256

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 0 Axles, Planetaries and Brakes Brake Inspection and Repair 1. Brake housing (LH shown) 2. Seal 3. Pull ro d 4. Clevis pin (2 used) 5. Link (2 used) 6. Hit ch pin ( 2 used) 7. Stationary disc (4 used) 8. Rotating disc (3 us ed) 9. Retaining ring 10. Gask et 1 1. Rotati ng actu ator 12. Extension sprin ...

  • Toro 30874 - page 257

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 1 Axles, Planetaries and Brakes This page is intentionally blank. Axles, Planetaries and Brakes ...

  • Toro 30874 - page 258

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 2 Axles, Planetaries and Brakes Planetary Wheel Drive Assembly Figure 7 FRON T RIGHT 1. Flange head screw (6 per planetary) 2. Splined brake shaft 3. Planetary assembly (2 used) 4. Front wheel assembly (2 used) 5. Lug nut (8 per wheel) 6. R etaining ring 7. Spring plate 8. Compression spring 9. Jam nu ...

  • Toro 30874 - page 259

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 13 Axles, Planetaries a nd Brakes 4. Remove front wheel assembly . 5. Remove hydraulic whe el motor (see Front Wheel Motors in the Service and Repairs section of Chapte r 4 - - Hydraulic System). 6. Remove brak e assembly (see Brake Assembl y in this section). 7. Support planetary assemb ly to prevent i ...

  • Toro 30874 - page 260

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 4 Axles, Planetaries and Brakes Planetary Wheel Drive Service 1. Spindle 2. Boot seal 3. Oil seal 4. Inner bearing cone 5. Inner bearing cup 6. Whee l stud (8 u sed) 7. Socket head screw (16 used) 8. Lock washer (16 used) 9. Housing 10. Dowel pin (2 used) 1 1. Outer bearing cup 12. Outer bearing cone ...

  • Toro 30874 - page 261

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 15 Axles, Planetaries a nd Brakes NOTE: The planetary wheel drive assem b ly can be ser- viced with the p lanetary installed to machine. If th e spindle (item 1) needs t o be removed fr om machine, see Planetary Wheel Drive A ssembly in this section. Disassembly (Figs . 1 1 and 12) 1. If plane tary whee ...

  • Toro 30874 - page 262

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 6 Axles, Planetaries and Brakes F . Lightly oil bearing journals on spindle shaft. Slide housing assembly onto spindle (item 1) taking care to not damage seal or spindle. Make sure that inner bearing in housing fully seats against spin dle shaft shoulder . G. Install outer bearing cone (item 12) onto ...

  • Toro 30874 - page 263

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 17 Axles, Planetaries a nd Brakes This page is intentionally blank. Axles, Planetaries and Brakes ...

  • Toro 30874 - page 264

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 1 8 Axles, Planetaries and Brakes Rear Axle Assembly Figure 13 70 ft - - lb (94 N - - m) m aximum FRON T RIGHT 85 to 100 ft - - lb (1 16 to 135 N - - m) 1. Rear a xle mot or 2. O - - ring 3. Pinion gea r 4. External snap ring (2 used) 5. O - - ring 6. Hydraulic fitting 7. O - - ring 8. 90 o hydraulic fi ...

  • Toro 30874 - page 265

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 19 Axles, Planetaries a nd Brakes Remove Rear Axle (Fig. 13) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Drain oil from rear axle an d rear axle gearbox (Figs. 14 and 15). CAUTION When changing attachments, tir ...

  • Toro 30874 - page 266

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 2 0 Axles, Planetaries and Brakes 2. If removed, install the tie r od to rear axle (Fig. 1 6). T ighten b all joint castle nuts a nd install new cott er pins. 3. Support axle under machine with a jack. Position axle assembly to rear fra me mount. 4. Install rear axle p ivot pin to secure axle to frame. ...

  • Toro 30874 - page 267

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 21 Axles, Planetaries a nd Brakes This page is intentionally blank. Axles, Planetaries and Brakes ...

  • Toro 30874 - page 268

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 2 2 Axles, Planetaries and Brakes Rear Axle Service Figure 19 3 2 4 5 6 7 8 9 10 14 13 12 11 15 1 10 11 8 9 8 13 16 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 20 41 42 43 50 44 45 46 47 48 49 51 54 55 56 57 58 59 52 53 60 61 62 63 64 22 ...

  • Toro 30874 - page 269

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 23 Axles, Planetaries a nd Brakes 1. LH axle support 2. Flange bushing (2 used) 3. Axle vent 4. Filter 5. V ent extension 6. Cap screw (4 used per gear case) 7. Shi m set 8. Seal washer 9. Plug 10. Lock nut 1 1. Lock washer 12. Grease fitting 13. Bal l bear ing 14. Screw (2 used per steering arm) 15. Ax ...

  • Toro 30874 - page 270

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 2 4 Axles, Planetaries and Brakes Bevel Gear Case and Axle Case The following proce dures assume the rear axle assem- bly has been re moved from the machine. Removal 1. Remove the moun ting screws, nuts and lock wash- ers. Remove th e bevel ge ar case/axle case assembly and O-ring from the ax le support ...

  • Toro 30874 - page 271

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 25 Axles, Planetaries a nd Brakes 5. Remove the knuckl e pin mounting screws and th e knuckle pin. Remove the g asket and any remaining gas- ket mater ial from either m ating surface (Fig. 23). 6. While hol ding the bevel gear case, tap the upper en d of the bevel gear shaft o ut of the upper bearin g a ...

  • Toro 30874 - page 272

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 2 6 Axles, Planetaries and Brakes Installation 1. Coat new shaft seal with grease and install in axle case as shown (Fig. 25). 1. Axle case 2. Bevel gear case 3. Sh aft sea l Figure 25 1 2 3 2. Install the lower beve l gear and bevel gear shaft in the axle case cover . Coat a new O -ring with grease and ...

  • Toro 30874 - page 273

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 27 Axles, Planetaries a nd Brakes 5. Determine necessary qu antity of support shims. A . L u b r i c a t et h ea x l ec a s es u p p o r tb u s h i n gw i t ha thin coat of grease and slide axle case suppo rt onto knuckle pin. B. Position support shims that were r e moved during disassembly between axle ...

  • Toro 30874 - page 274

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 2 8 Axles, Planetaries and Brakes 9. Remove th e bevel gear c ase/axle case assembly from the axle suppo rt. Coat a new O- ring with grease and temporar ily install the ax le cover assembly . Position a dial indica tor at the tooths center . Prevent the axle from turning and measure the lower bevel ge a ...

  • Toro 30874 - page 275

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 29 Axles, Planetaries a nd Brakes Axle Shafts The following p rocedure s assume t he rear a xle assem- bly has been removed fr om the machine. Removal 1. Remove the axle cover mounting screws. Remove t h ea x l ec o v e rf r o mt h ea x l ec a s ea sa na s s e m b l y (Fig. 32). 2. Use a bea ring puller ...

  • Toro 30874 - page 276

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 3 0 Axles, Planetaries and Brakes Input Shaft/Pinion Gea r Figure 35 1 1. Nut (2 used) 2. Lock washer (2 used) 3. Stud (2 used) 4. Lock nut 5. Stake washer 6. Oil seal 7. O-ring 8. Seal collar 9. Beari ng 10. O -ring 1 1. Input shaft/pinion g ear 12. Bearing case 13. Shim 14. Screw (2 used) 15. Gear cas ...

  • Toro 30874 - page 277

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 31 Axles, Planetaries a nd Brakes 5. Instal l a new stake washer . Install the lock nut finge r tight. 6. Set the beari ng preload by securing the bearing case in a vise. Thread a M12 x 1.5 hex head cap screw into the splined end of the input shaft/pinion gear and slowly tighten the lock nut un til 4 to ...

  • Toro 30874 - page 278

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 3 2 Axles, Planetaries and Brakes Differentia l Gear The following proce dures assume the rear axle assem- bly has been re moved from the machine. Removal 1. Remove bevel gear case/axle case assemblies (see Bevel Gear Case/Axle Case Assembly in this section of this manual). IMPORT ANT : Do not interchan ...

  • Toro 30874 - page 279

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 33 Axles, Planetaries a nd Brakes Inspection 1. Measure the dif ferential side gear O.D. and the dif- ferential case I.D. to determine the side gear to ca se clearance (Fig. 42) . Replace components as ne cessary . SIDE GEAR TO CASE CLEARANCE: 0.002 to 0 .012 in. (0. 05 to 0.30 mm) SIDE GEAR O.D. (Facto ...

  • Toro 30874 - page 280

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 3 4 Axles, Planetaries and Brakes Installation 1. If the r ing gear was removed from th e differ ential case, use medium strength Loctite thread locker and tighten the mountin g screws from 22 to 25 ft -lb (30 to 34 N - - m) . 2. Apply molybdenum disul fide lubricant (Three Bond 1901 or equivalent ) to ...

  • Toro 30874 - page 281

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 35 Axles, Planetaries a nd Brakes Pinion Gear to Ring Gear Engagement The final position o f the pinion gear is verified b y using the gear contact pattern method as de scribed in the fol- lowing procedure. GEAR TOOTH DEFINITIONS (Fig. 46): To e - - the portion of the too th surface at the end to- wards ...

  • Toro 30874 - page 282

    Groundsmaster 4500- - D/4700 - - D Page 6 - - 3 6 Axles, Planetaries and Brakes Gear Patter n Movement Sum mary Every gear has a characteristic pattern. The il lustrations show typical patte rns only and exp lain how patt erns shift as gear location is chan ged. 1. If contact is toward th e heel or base of the g ear (Fig. 49): A. Install thick er o ...

  • Toro 30874 - page 283

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 1 Chassis Chapter 7 Chassis T able o f Contents GENERAL INFORMA TION 2 ..................... Operator ’s Manu al 2 .......................... Cutting Deck Identification 2 .................... SERVICE AND REP AIRS 4 ...................... Steering Co lumn 4 ...................... ...... T raction Peda ...

  • Toro 30874 - page 284

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 2 Chassis General Information Operator ’ s Manual The T raction Unit and Cutting Deck Operator ’s Manuals provide information regard ing the operation, general maintenance and mainten ance intervals for your Groundsmaster machine. Refer to these publications for additional infor mation when servicin ...

  • Toro 30874 - page 285

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 3 Chassis This page is intentionally blank. Chassis ...

  • Toro 30874 - page 286

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 4 Chassis Service and Repairs Steering Column 1. Steering wheel cover 2. Lock nut 3. Steering wheel 4. Flat washer 5. Socket head screw (4 used) 6. Flange head screw (4 used) 7. Steering column 8. Steering control valve 9. Socket head screw (4 used) 10. Flange nut (4 used) 1 1. Tinne rman nut (4 used) 1 ...

  • Toro 30874 - page 287

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 5 Chassis 9. Loosen and remove fou r (4) socket head screws (item 5) that secure steering control valve to steering column. 10. Loosen and remove four (4) socket head screws (item 9) and flange nuts (item 10) that secure steering column to machine. 1 1. Carefully raise steer i n gc o l u m na s s e m b ...

  • Toro 30874 - page 288

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 6 Chassis Tr a c t i o n P e d a l 1. Washer head screw (2 used) 2. Reverse pedal pad 3. Pedal assembly 4. Spring pin 5. Forward pedal pad 6. Accelerator pedal 7. Cap screw 8. Flat washer 9. Jam nut 10. Rod end bearing 1 1. Slo tted ro ll pin 12. Cap screw (4 used) 13. Flange bearing mount 14. Flange nu ...

  • Toro 30874 - page 289

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 7 Chassis IMPORT ANT : A properly assembled and calibr ated traction pedal position sensor is critical to accur ate traction system response a nd for reliable sensor life. Use care when rem oving, assembling and cali - brating the traction pedal position s ensor . Disassembly (Fig. 5) 1. Park machine on ...

  • Toro 30874 - page 290

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 8 Chassis Console Arm 1. Console arm frame 2. LH cover 3. RH cover 4. W asher head screw (10 used) 5. Phillips head screw 6. Lock nut 7. Cover plate 8. Flange head screw (2 used) 9. Mount 10. U - - nut (5 used) 1 1. Flange head screw (5 used) 12. S witch panel 13. Riv et (2 used ) 14. Arm rest 15. Flang ...

  • Toro 30874 - page 291

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 9 Chassis Disassembly (Fig. 8) 1. Park machine on a level s urface, lower cu tting decks, stop engine and engage parking brake. Remove key from igni tion switch. 2. Remove two (2) flange head screws (item 8) and then cover plate (item 7) from outside of console arm. Locate and retrieve two (2) flang e s ...

  • Toro 30874 - page 292

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 10 Chassis Lift Arms for Cutting Decks #1, #4 and #5 1. Flat washer 2. Flange nut 3. Lift arm (#1 deck) 4. Lift cylinder pin 5. Flange head screw 6. Flange nut 7. Cap screw 8. Lift cylinder (#4 and #5 decks) 9. Lift cylinder (#1 deck) 10. Thrust washer (2 used per arm) 1 1. Lock nut 12. Pivot pin 13. Sl ...

  • Toro 30874 - page 293

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 1 1 Chassis 5. Loosen and remo ve lock nut (item 1 1) from lift arm pivot pin. 6. Support lift arm and pull lift arm pivot pin from lift arm and frame. Locate and remove thr ust washers from bot h sides of lift arm during p ivot pin removal. 7. Remove lift arm from machin e. 8. Disassemble lift arm as n ...

  • Toro 30874 - page 294

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 12 Chassis Lift Arms for Cutting Decks #2 and #3 1. Grease fitting 2. Set screw (2 used per stop) 3. Rotation stop 4. Flange head screw 5. Lock nut 6. Slotted roll pin 7. Pivo t pin 8. Bumper 9. Thrust washer 10. Lift cylinder pin 1 1. Deck pivot shaft 12. Lift arm (#2 deck shown) 13. Flange nut 14. Thr ...

  • Toro 30874 - page 295

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 13 Chassis Removal (Fig. 13) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Remove cutti ng deck from lift arm (see Cutting Deck Operat or ’s Manu al). 3. Remove lift cylinder pin (item 10) that secures lift cyl ...

  • Toro 30874 - page 296

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 14 Chassis Lift Arms for Cutting Decks #6 and #7 (Groundsmaster 4700 - - D) 1. Retaining ring 2. Flat washer (4 used per support arm) 3. Cap screw (4 used per support arm) 4. Flange bushing 5. Lift cylinder 6. Plastic roller 7. Lock nut 8. Grease fitting 9. Rear link 10. Lift link 1 1. Carriage screw 12 ...

  • Toro 30874 - page 297

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 15 Chassis Removal (Fig. 15) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Remove cutti ng deck from lift arm (see Cutting Deck Operat or ’s Manu al). 3. Remove pin (item 27) that secures lift links (ite m 10) ...

  • Toro 30874 - page 298

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 16 Chassis Operator Seat 1. Seat frame 2. Seat plate 3. T orsion spring 4. Seat plate latch 5. Clevis pin 6. Flat washer 7. Cotter pin 8. Hair pin (4 used) 9. Seat frame rod (2 used) 10. R - - clamp (2 used) 1 1. Flat washer ( 3 used) 12. Hair pin 13. Seat pivot shaft 14. Screw (2 used) 15. Flat washer ...

  • Toro 30874 - page 299

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 17 Chassis Removal (Fig. 17) 1. Park machine on a level s urface, lower cu tting decks, stop engine, apply parking brake and remove key from the ignition switch . 2. Disconnect seat electrical connector from machine wire harness. 3. Support console ar m assembly t o prevent it fr om shifting. 4. Remove ...

  • Toro 30874 - page 300

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 18 Chassis Operator Seat Service 1. Backrest cushion 2. Seat cushion 3. LH armrest cover 4. LH armrest 5. Bushing (2 used) 6. Backrest 7. Plug (2 used) 8. Cable tie (3 used) 9. LH adjustment rail 10. Bumper (2 used) 11 . W a s h e r 12. Cap screw (2 used) 13. Seat 14. Nut 15. Spring (2 used) 16. Magnet ...

  • Toro 30874 - page 301

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 19 Chassis Disassembly (Fig. 19) 1. Remove seat from ma chine for service (see Opera- tor Seat Removal in this section). 2. Disassemble operator sea t a s necessary using Fig- u r e1 9a sag u i d e . Assembly (Fig. 19) 1. Asse mble operator seat using Figure 19 as a guide. 2. Install seat to machine (se ...

  • Toro 30874 - page 302

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 20 Chassis Operator Seat Suspension 1. Cover 2. Cover 3. Level control 4. Air control valve 5. Shock absorber 6. Air spring 7. Air tube assembly 8. Wire harness 9. Compressor 10. Bellows 11 . S t o p 12. Bumper set (2 used) 13. Roller (4 used) 14. W asher (2 used) 15. T ether 16. Rivet (2 used) 17. W as ...

  • Toro 30874 - page 303

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 21 Chassis NOTE: Most of the seat suspension com ponents can be serviced with the seat suspension base mounte d to the seat plate. If the air spring assembly (item 6) requires removal, the seat suspension base will have to be re- moved from t he seat plat e. Disassembly (Fig. 20) 1. Park machine on a le ...

  • Toro 30874 - page 304

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 22 Chassis Hood 1. Screen 2. Latch keeper 3. Pop rivet (2 used) 4. Hood 5. Plastic plug (20 used) 6. Hood screen 7. Radiator mount 8. Flange head screw 9. Hair pin (2 used) 10. Rear bumper 1 1. Washer (2 used) 12. Rubber bumper (2 used) 13. Flange nut (2 used) 14. Pop rivet (4 used) 15. Flex draw latch ...

  • Toro 30874 - page 305

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 23 Chassis Removal (Fig. 22) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Release hood la tches and raise hood. 3. Remove hair pins and washers from pivot pins on ra- diator frame. 4. Remove hood fr om pivot pin ...

  • Toro 30874 - page 306

    Groundsmaster 4500- - D/4700 - - D Page 7 - - 24 Chassis This page is intentionally blank. ...

  • Toro 30874 - page 307

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 1 Chapter 8 Cutting Decks T able o f Contents SPECIFICA TIONS 2 ............................ GENERAL INFORMA TION 3 ..................... Operator ’s Manu al 3 .......................... TROUBLESHOOTING 4 ......................... Factors That Can Affect Quality of Cut 4 ......... SPECI ...

  • Toro 30874 - page 308

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 2 Specifications Groundsmaste r 4700 - - D Groundsmaster 4500 - - D MOUNTING: All cutting decks are supporte d by inde- pendent lift arms and are interch angeable to any cutting deck positions. The Groundsmaster 4500 - - D uses five (5) cutting decks. The Gro undsmaster 4700 - - D uses sev ...

  • Toro 30874 - page 309

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 3 General Information CAUTION Never install or work on the cuttin g decks or lift arms with the engine running. Always stop en- gine and remove key fr om ignition switch first. Operator ’ s Manual The Cutting Deck Operator ’s Manual provides in forma- tion regarding th e operation, ge ...

  • Toro 30874 - page 310

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 4 T roubleshooting There are a number of factors th at can contribute to un- satisfactory quali ty of cut, some of which may be tu rf conditions. T urf conditions such as excessive thatch, “sponginess”, uneven ground con ditions or attempting to cut off too much grass height may not al ...

  • Toro 30874 - page 311

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 5 Special T ools Order special tools f rom your T oro Distributor . Rear Roller Bearing and Seal Installation T ools These tools are used to assemble the c utting deck rear roller . T oro Part Numbers: Inner Seal T ool 1 15 - - 0852 Bearing/Outer Seal T ool 1 15 - - 0853 Bearing Installat ...

  • Toro 30874 - page 312

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 6 Adjustments CAUTION Never install or work on the cutting decks or lift arms with the engine running. Always stop en- gine and remove key from ignition switch first. See the Cutting Deck Operator ’s Manual for adjustment procedures for cutti ng decks on the Groundsmaster 4500 - - D and ...

  • Toro 30874 - page 313

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 7 This page is intentionally blank. Cutting Decks ...

  • Toro 30874 - page 314

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 8 Service and Repairs CAUTION Never install or work on the cutting decks or lift arms with the engine running. Always stop en- gine and remove key from ignition switch first. Blade Spindle A ssembly 1. Flange nut (6 used) 2. Hydraulic deck motor 3. Spindle plate 4. Cutting deck 5. O - - ri ...

  • Toro 30874 - page 315

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 9 Removal (Fig. 4) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. Remove two (2) socket hea d screws and flat wash- ers that secure hydraulic motor to the cutti ng deck (Fig. 5). Remove hydraulic mo ...

  • Toro 30874 - page 316

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 10 Blade Spindle Ser vice Disassembly (Fig. 6) 1. Remove blade spin d le from cutting deck (see Blade Spindle Removal in this section). 2. Loosen and remo ve spindle nut from t op of spindle shaft. 3. Remove the spin d le shaft from the spi ndle housing which may require the use of an arbo ...

  • Toro 30874 - page 317

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 1 1 3. Using an arbor press, push the bearing cups into th e top and bottom of the spindle housin g. The t op bearing cup must contact the outer bearing s pacer previously installed, and the bottom bearing cup must contact the large snap ring. Make sure that the assembly is correct by sup ...

  • Toro 30874 - page 318

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 12 Rear Roller 1. Deck frame 2. Rear roller assembly 3. Grease fitting 4. Roller shaft screw 5. Roller mount 6. Flange head screw 7. Skid bracket 8. Cap screw Figure 10 8 5 4 1 7 6 3 2 FRONT RIGHT 29 to 35 ft - - lb (40 to 47 N - - m) 29 to 35 ft - - lb ( 4 0t o4 7N - - m ) ...

  • Toro 30874 - page 319

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 13 Removal (Fig. 10) 1. Park machine on a level s urface, lower cu tting decks, stop engine, engage parking brake and remove key from the ignition switch . 2. If cutting deck is eq u ipped with a roller scraper (Fig. 1 1), remove fasteners securing left and right scraper ro d brackets to ...

  • Toro 30874 - page 320

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 14 Rear Roller Service Disassembly (Fig. 12) 1. Remove bearing lock nut from ea ch end of roller shaft. 2. Loosely secure roll er assembly in bench vise and lightly ta p one end of roller shaft until outer seals and bearing are remove d from opposite end of roller tube. Remove second set o ...

  • Toro 30874 - page 321

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 15 3. From the r oller tube end with o nly the inner seal installed, carefully install th e roller shaft into the roller tube. Make sure that seals are not damaged as sh aft is installed. 4. Instal l new bearing and outer seal s into second end of roller tube: A. Position a second new bea ...

  • Toro 30874 - page 322

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 16 Front Roller Service Disassembly (Fig. 18) 1. Remove roller moun ting bolt. 2. Remove roller assembly from carrier frame. 3. T o remove bearin gs and bearing spa cer: A. Insert pu nch throug h end of rolle r and drive opp o- site bearing out by alternating ta ps to opposite side of inne ...

  • Toro 30874 - page 323

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 17 This page is intentionally blank. Cutting Decks ...

  • Toro 30874 - page 324

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 18 Cutting Deck Carrier Frame 1. Carr ier fr ame 2. L ynch pin 3. Thrust washer 4. Pivot shaft 5. Lift arm (#4 shown) 6. Flange nut (2 used p er deck) 7. Hardened washer (2 used per deck) 8. Cap screw (2 used per deck) 9. Cap s crew 10. Reb ound w asher 11 . P i v o t s h a f t 12. Lif t a ...

  • Toro 30874 - page 325

    Groundsmaster 4500- - D/4700 - - D Cutting D ecks Page 8 - - 19 Removal an d Insta llation ( Fig. 19) Each cutting deck is suspended from a carrier frame. The cutt ing deck car rier frame is attached to the lif t arm and allows the cutting de ck to pivot on the lift arm pivot shaft. Cutting deck positions are identifi ed in Figure 20. Cutting deck ...

  • Toro 30874 - page 326

    Groundsmaster 4500- - D/4700 - - D Cutting Decks Page 8 - - 20 This page is intentionally blank. ...

  • Toro 30874 - page 327

    Groundsmaster 4500- - D/4700 - - D Foldout Drawings Page 9 - 1 Chapter 9 Foldout Drawings T able o f Contents ELECTRICAL DRA WING DESIGNA TIONS 2 ....... HYDRAULIC SCHEMA TICS Groundsmaster 45 00 - - D 3 ..................... Groundsmaster 4500- - D with Optional Flow Divider Kit 4 ........................... Groundsmaster 47 00 - - D 5 ........... ...

  • Toro 30874 - page 328

    Groundsmaster 4500- - D/4700 - - D Foldout Drawings Page 9 - 2 Electrical Drawing Designations The following a bbreviations are us ed for wire harness colors on the electrical sch ematics and wire harness drawings in this chapter . ABBREVIA TION COLOR BK BLACK BR or BN BROWN BU BLUE GN GREEN GY GRA Y OR ORANGE PK PINK Ro rR D R E D TT A N VIO VIOL ...

  • Toro 30874 - page 329

    Page 9 - 3 Hydr aulic S chem atic Groundsmaster 4500 - - D 1. FLOWS SHOWN ARE CALCUL A TED A T HI GH IDLE AND 95% PUMP EFFICIENCY UNLE SS OTHERWISE NOTED 0.630” ROD 0.630” ROD 1050 PSI 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P CHG G1 ...

  • Toro 30874 - page 330

    Page 9 - 4 Hydr aulic S chem atic With Optional Flow Di vider Kit 1. FLOWS SHOWN ARE CALCUL A TED A T HI GH IDLE AND 95% PUMP EFFICIENCY UNLE SS OTHERWISE NOTED 0.630” ROD 0.630” ROD 1050 PSI 1600 PSI 6.2 GPM 11 . 4 G P M 3500 PSI 3500 PSI 1500 PSI 1500 PSI P1 P2 T1 G1 PRV1 PRV2 LC1 LC2 M1 M2 M3 M4 T RV09 PRV S1 CV FD P2 P1 ST L M1 M2 PE T R P ...

  • Toro 30874 - page 331

    Page 9 - 5 Hydr aulic S chem atic Groundsmaster 4700 - - D 1. FLOWS SHOWN ARE CALCUL A TED A T HI GH IDLE AND 95% PUMP EFFICIENCY UNLE SS OTHERWISE NOTED 0.630” ROD 0.630” ROD 1050 PSI 6.2 GPM 11 . 4 G P M T PRV S1 CV FD P2 P1 ST L M1 M2 PE T R 50/50 FLOW DIVIDER FAN CONTR OL MANIFO LD MANIFO LD 4350 PSI 30.5 GPM 1.83 CID / 0.89 CID PR 450 PSI ...

  • Toro 30874 - page 332

    Page 9 - 6 1. FLOWS SHOWN ARE CALCUL A TED A T HI GH IDLE AND 95% PUMP EFFICIENCY UNLE SS OTHERWISE NOTED 0.630” ROD 0.630” ROD 1050 PSI 6.2 GPM 11 . 4 G P M T PRV S1 CV FD P2 P1 ST L M1 M2 PE T R 50/50 FLOW DIVIDER FAN CONTR OL MANIFO LD MANIFO LD 4350 PSI 30.5 GPM 1.83 CID / 0.89 CID PR 450 PSI RV PSI .050 CV T P2 M8 CH OR1 250 PSI 5000 PSI E ...

  • Toro 30874 - page 333

    Page 9 - 7 Electr ical Schematic Groundsmaster 4500 - - D/4700 - - D Models 30881 and 30882 GM4700- D TRACTION PEDAL POSITI ON SENSOR TRACTION PEDAL POSITI ON SENSOR LH (#4) DECK RH (#5) DECK All r elays and so lenoids are shown as de - - energiz ed. All gr ound wir es are black. WIRE COLOR ABBREVIA TIONS. NOTE: REFER TO ELE CTRICAL DRA WING DESIGN ...

  • Toro 30874 - page 334

    Page 9 - 8 Electr ical Schematic Groundsmaster 4500 - - D/4700 - - D Models 30873 and 30874 All r elays and so lenoids are shown as de - - energiz ed. All gr ound wir es are black. GM4700- D TRACTION PEDAL POSITI ON SENSOR TRACTION PEDAL POSITI ON SENSOR LH (#4) DECK RH (#5) DECK LH (#7) DEC K POSIT ION SWI TCH RH (#6) DECK POSI TIO N SWIT CH WIRE ...

  • Toro 30874 - page 335

    Page 9 - 9 Electr ical Schematic Groundsmaster 4500 - - D/4700 - - D Optional Operator Cab All r elays and so lenoids are shown as de - - energiz ed. All gr ound wir es are black. WIRE COLOR ABBREVIA TIONS. NOTE: REFER TO ELE CTRICAL DRA WING DESIGNA TIONS IN THIS CHAPTER FOR ...

  • Toro 30874 - page 336

    Page 9 - 10 Groundsmaster 4500 - - D/4700 - - D Ma in Wi re Ha rn es s P26 DECK PTO 1 P24 DECK PTO 2 P19 S5 P20 S6 P89 INTERCONNECT T O SEA T/ CONSOLE P04 HEADLIGHT RH P79 HEADLIGHT LH P07 RH (#5 ) DECK POSITION SWITCH P13 P87 GM 4700 INTERCONNECT GROUND P88 GM 4700 INTERCONNECT P93 ENGIN E GROUND P21 FAN D I RE C T I ON P22 FAN SPEED P69 TEC- -500 ...

  • Toro 30874 - page 337

    Page 9 - 1 1 Groundsmaster 4500 - - D/4700 - - D Ma in Wi re Ha rn es s DRAWING DESIGNA TIONS IN THIS CHAPTER NOTE: T HIS DRAWING IDENTIFIES WIRE GAUGE SIZE AND WIRE COLOR. REFER TO ELECTRICAL FOR ADDITIO NAL INFORMA TION. TRACTION PEDAL POSITI ON SENSOR RH (#5) DECK POSITI ON SWI TCH LH (#4) DECK POSITI ON SWI TCH ...

  • Toro 30874 - page 338

    Page 9 - 12 Groundsmaster 4500 - - D/4700 - - D Seat and Console Wire Har n ess ...

  • Toro 30874 - page 339

    Page 9 - 13 Groundsmaster 4500 - - D/4700 - - D Seat and Console Wire Har n ess DRAWING DESIGNA TIONS IN THIS CHAPTER NOTE: T HIS DRAWING IDENTIFIES WIRE GAUGE SIZE AND WIRE COLOR. REFER TO ELECTRICAL FOR ADDITIO NAL INFORMA TION. ...

  • Toro 30874 - page 340

    Page 9 - 14 Groundsmaster 4500 - - D/4700 - - D Power Center Wir e Harness ...

  • Toro 30874 - page 341

    Page 9 - 15 Groundsmaster 4500 - - D/4700 - - D Power Center Wir e Harness DRAWING DESIGNA TIONS IN THIS CHAPTER NOTE: T HIS DRAWING IDENTIFIES WIRE GAUGE SIZE AND WIRE COLOR. REFER TO ELECTRICAL FOR ADDITIO NAL INFORMA TION. ...

  • Toro 30874 - page 342

    Page 9 - 16 D e c k6a n d7W i r eH a r n e s s Groundsmaster 4700 - - D LH (#7) DECK RH (#6) DECK POSI TIO N SWITCH POSI TIO N SWITCH 1 11 21 31 41 30 20 10 40 50 NO TE T AB POS ITION PIN AND BACKSHELL ORIEN T A TION (TEC- -5001) ...

  • Toro 30874 - page 343

    Page 9 - 17 D e c k6a n d7W i r eH a r n e s s Groundsmaster 4700 - - D DRAWING DESIGNA TIONS IN THIS CHAPTER NOTE: T HIS DRAWING IDENTIFIES WIRE GAUGE SIZE AND WIRE COLOR. REFER TO ELECTRICAL FOR ADDITIO NAL INFORMA TION. LH (#7) DEC K RH (#6 ) DECK POSITION SWITCH POSITION SWITCH ...

  • Toro 30874 - page 344

    Page 9 - 18 (Models 30881 and 30882) Engi ne Wire H arnes s Dr awing Groundsmaster 4500 - - D/4700 - - D PIN AND BACKSHELL ORIEN T A TION FOR P01 & P02 ...

  • Toro 30874 - page 345

    Page 9 - 19 (Models 30881 and 30882) Engi ne Wire H arnes s Dia gram DRAWING DESIGNA TIONS IN THIS CHAPTER NOTE: T HIS DRAWING IDENTIFIES WIRE GAUGE SIZE AND WIRE COLOR. REFER TO ELECTRICAL FOR ADDITIO NAL INFORMA TION. Groundsmaster 4500 - - D/4700 - - D ...

  • Toro 30874 - page 346

    Page 9 - 20 (Models 30873 and 30874) Engi ne Wire H arnes s Dr awing Groundsmaster 4500 - - D/4700 - - D PIN AND BACKSHELL ORIEN T A TION FOR P23 ...

  • Toro 30874 - page 347

    Page 9 - 21 DRAWING DESIGNA TIONS IN THIS CHAPTER NOTE: T HIS DRAWING IDENTIFIES WIRE GAUGE SIZE AND WIRE COLOR. REFER TO ELECTRICAL FOR ADDITIO NAL INFORMA TION. (Models 30873 and 30874) Eng i n e Wire H arn e ss D ia g ram Groundsmaster 4500 - - D/4700 - - D ...

Manufacturer Toro Category Lawn Mower

Documents that we receive from a manufacturer of a Toro 30874 can be divided into several groups. They are, among others:
- Toro technical drawings
- 30874 manuals
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- information booklets
- or energy labels Toro 30874
All of them are important, but the most important information from the point of view of use of the device are in the user manual Toro 30874.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Toro 30874, service manual, brief instructions and user manuals Toro 30874. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Toro 30874.

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A complete manual for the device Toro 30874, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Toro 30874 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Toro 30874.

A complete Toro manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Toro 30874 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Toro 30874, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Toro 30874, that we can find in the current document
3. Tips how to use the basic functions of the device Toro 30874 - which should help us in our first steps of using Toro 30874
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Toro 30874
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Toro 30874 in a specific country, if it was not possible to solve the problem on our own.

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