Manuale d’uso / di manutenzione del prodotto 4300-D del fabbricante Toro
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Part No. 10178S L Service Manual Groundsmaster R 4300 - - D Preface The pur pose of this public ation is to pr ovide t he service technic ian with inf orm ation f or t roubles hooting, test ing and repair of maj or syst ems and co mponents on the Gr oundsmas ter 4300 - - D.
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Gr oundsmas ter 4300 - - D T able Of C ontents Chapter 1 - - Safety Safe ty Instr ucti ons 1 - - 2 .......................... Jackin g Instructions 1 - - 5 ......................... Safet y and I nst ruc tion Dec als 1 - - 6 ................ Cha pter 2 - - P roduct Re cor ds and Mainte nanc e Produc t Records 2 - - 1 .
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Gr oundmast er 4300 - - D Page 1 - - 1 Safety Chapter 1 Sa fety T able of Contents SAF ET Y INS TRUCT I ONS 2 ...................... Befor e Oper ating 2 ............................ While O perat ing 3 ............................. Maint enance and Ser vice 4 .
Gr oundsmas ter 4300 - - D Page 1 - - 2 Safe ty Safety Instructions Y our Groundsmas ter meets or exceeds safet y standard specif icat ions when weight s are ins talled ac cording to infor mat ion in t he Operator ’s Manual.
Gr oundmast er 4300 - - D Page 1 - - 3 Safety While Operating 1. Sit on the seat when st art ing and operat ing the ma- chine. 2. Bef ore st art ing t he engine: A. Apply t he parki ng brake. B. M ake sur e the trac tion pedal is in NEUT RAL and the PTO switc h is O FF (disengaged) .
Gr oundsmas ter 4300 - - D Page 1 - - 4 Safe ty Maintenanc e and Ser vice 1. Befor e ser vicing or mak ing adjustment s, lower cut - ting decks, st op engine, apply parki ng brake and re- move key from the ign ition switch. 2. Make s ure machine is in safe operating condit ion by keeping all nuts , bolt s and s crews t ight .
Gr oundmast er 4300 - - D Page 1 - - 5 Safety Jacking Instructions Wh en ch ang i ng at tach ment s, ti res or p erfo rm - ing othe r se rvic e, us e cor re ct s upports , hoists and j acks. Make su re machi ne i s parked o n a sol id , level su rface su ch as a co ncret e fl oo r .
Gr oundsmas ter 4300 - - D Page 1 - - 6 Safe ty Safety and Instruction Decals Numerous s afet y and instr uct ion dec als are aff ixed to the t ract ion unit and cutt ing unit s of y our G roundsm as- ter. If any decal bec omes illegible or damaged, inst all a new decal.
Groundsmaster 4300 - - D Page 2 - - 1 Product Records and Maintenance Chapter 2 Product Records and Maintenance T able of Contents PRODUCT RECORDS 1 ......................... MAINTENANCE 1 ............................... EQUIV ALENTS AND CONVERSIONS 2 .
0.09375 Groundsmaster 4300 - - D Page 2 - - 2 Product Records and Maintenance Equivalents and Conversions.
Groundsmaster 4300 - - D Page 2 - - 3 Product Records and Maintenance T orque Specifications Recommended fastener torque values are listed in the following tables.
Groundsmaster 4300 - - D Page 2 - - 4 Product Records and Maintenance Standard T orque for Dry , Zinc Plated and Steel Fasteners (Inch Series) Thread Size Grade 1, 5 & 8w i t hT h i n Height Nuts .
Groundsmaster 4300 - - D Page 2 - - 5 Product Records and Maintenance Standard T orque for Dry , Zinc Plated and Steel Fasteners (Metric Series) T h r e a d S i z e Class 8.
Groundsmaster 4300 - - D Page 2 - - 6 Product Records and Maintenance Other T orque Specifications SAE Grade 8 Steel Set Screws T h r e a d S i z e Recommended T orque Thread Size Square Head Hex Sock.
Gr oundsmas ter 4300 - - D P age 3 - - 1 Kubota D i esel En gi n e Chapter 3 Kubota Diesel Engine T able of Contents GENE RAL IN FORMA TION 1 ..................... Oper ator ’s Manual 1 .......................... Stopping t he Engine 1 .............
Gr oundsmas ter 4300 - - D Page 3 - - 2 Kubota Di esel Engi n e Specifications Item Descri ptio n Make / D es ignation Kubota V1505 - - T - - E3B , 4 - - s tr oke, Liquid Cooled, O HV , Turbocharged D ies el Number of C y linders 4 Bore x Stroke 3.07 in x 3.
Gr oundsmas ter 4300 - - D P age 3 - - 3 Kubota D i esel En gi n e Adjustments Adjust Thr ottle Contr ol Proper throt t le operat ion is dependent upon proper ad- justm ent of thr ott le contr ol. NOT E: T he thr ott le cable swivel should be posit ioned in the lowest hole in the s peed cont rol lever.
Gr oundsmas ter 4300 - - D Page 3 - - 4 Kubota Di esel Engi n e Service and Repairs Fuel System Figur e 2 1. Fuel cap 2. Bushi ng 3. Washer head screw ( 2 used) 4. Flange nut (3 used) 5. Clamp ( 2 used) 6. Re turn fitting 7. Suctio n fit ting 8. Hose clamp 9.
Gr oundsmas ter 4300 - - D P age 3 - - 5 Kubota D i esel En gi n e DANGER Because d i esel f uel is h i gh l y fl ammabl e, u se ca ution when s toring or handling it. Do not sm oke while filling the fue l tank . Do not fill fue l ta nk while engine is running, when engine is hot or wh en mach in e is i n an enclo sed area.
Gr oundsmas ter 4300 - - D Page 3 - - 6 Kubota Di esel Engi n e Air Cleaner Figur e 4 1. Air clean er assembly 2. Indicat or 3. Adapt er 4. Spri ng 5. Hex nut 6. Bolt 7. Hose 8. Hose 9. Mount bracket 10. A ir cleaner stan d 1 1. Hose clamp (3 used) 12.
Gr oundsmas ter 4300 - - D P age 3 - - 7 Kubota D i esel En gi n e Removal ( Fi g. 4) 1. Par k m achine on a level surf ace, lower cut ting decks, st op engi ne, engage parking brake and remove key f rom t he ignit ion swit ch. Rais e and support hood.
Gr oundsmas ter 4300 - - D Page 3 - - 8 Kubota Di esel Engi n e Exhaust System Figur e 6 1. Gasket 2. Lock wash er (2 u sed) 3. Flange nut (4 used) 4. Cap scr ew ( 2 used) 5. Carr iage scr ew ( 4 used) 6. Flange nut (4 used) 7. Muffler suppor t bracket 8.
Gr oundsmas ter 4300 - - D P age 3 - - 9 Kubota D i esel En gi n e Removal ( Fi g. 6) 1. Par k m achine on a level surf ace, lower cut ting decks, st op engi ne, engage parking brake and remove key f rom t he ignit ion swit ch. Rais e and support hood.
Gr oundsmas ter 4300 - - D Page 3 - - 10 Kubota D i esel En gi n e Radi ator Figur e 8 1. Over flow bo ttl e 2. Hose clamp (3 u sed) 3. Hose 4. Foam seal (2 u sed) 5. Foam seal (4 u sed) 6. Mounting bracket ( 2 used) 7. Oil coo ler 8. Pipe plug 9. Hy draulic fitti ng (2 used) 10.
Gr oundsmas ter 4300 - - D Pa ge 3 - - 1 1 Kubota D i esel En gi n e Removal ( Fi g. 8) 1. Par k m achine on a level surf ace, lower cut ting decks, st op engi ne, apply parking brake and remove key f rom t he ignition s witc h. 2. Raise and suppor t t he hood.
Gr oundsmas ter 4300 - - D Page 3 - - 12 Kubota D i esel En gi n e Engi ne Figur e 9 1. Engin e assembly 2. Cap scr ew ( 12 used) 3. T emperatu re sender 4. Engine mount (4 used) 5. Flange head scr ew (13 u sed) 6. Snubbing washer (4 used) 7. Cap scr ew ( 4 used) 8.
Gr oundsmas ter 4300 - - D Page 3 - - 13 Kubota D i esel En gi n e Removal ( Fi g. 9) 1. Par k m achine on a level surf ace, lower cut ting decks, st op engi ne and remove key from t he ignition switc h. Chock wheels t o keep the machine fr om mov ing.
Gr oundsmas ter 4300 - - D Page 3 - - 14 Kubota D i esel En gi n e 9. Disconnect hydraulic t ransm ission dr ive shaf t fr om engine (see Hy draulic Transmiss ion Drive S haft Re- moval in t he Ser vice and Repair s sect ion of Chapt er 4 - - Hy draulic Sy stem ).
Gr oundsmas ter 4300 - - D Page 3 - - 15 Kubota D i esel En gi n e 7. Remove plugs inst alled in hos es dur ing disass em- bly . Connect hos es t o the engine: A. Connect f uel supply and fuel r etur n hoses t o en- gine fit tings ( Fig. 1 1). Secur e with hos e clamps .
Gr oundsmas ter 4300 - - D Page 3 - - 16 Kubota D i esel En gi n e This page is intent ionall y blank ..
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 Chapter 4 Hydraulic System T able of Contents SPECIFICA TIONS 2 ............................. GENERAL INFORMA TION 3 ..................... Operator ’s Manual 3 .......................... Check Hydraulic Fluid 3 .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 2 Specifications Item Description Piston (T raction) Pump Sauer - - Danfoss, LPV Closed Circuit Axial Piston Design Maximum Pump Displacement (per revolution) 2.14 in 3 (35 cc) Gear Pump Casappa 4 section, posit ive displacement gear type pump Section P1/P2 Displacement (per revolution) 1.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 3 General Information Operator ’s Manual The Operator ’s Manual provides information regarding the operation, general maintenance and maintenance intervals for your Groundsmaster 4300 - - D. Refer to that publication for additional information when servicing the machine.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 4 Hydraulic Hoses Hydraulic hoses are subject to extreme conditions such as pressure differentials during operation and exposure to weather , sun, chemicals, very warm storage condi- tions or mishandling during operation and maintenance.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 5 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.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 6 Hydraulic Fitting Installation (SAE Straight Thread O - - Ring Fitting into Component Port) Non - - Adjustable Fitting (Fig. 6) 1. Make sure all threads and sealing surfaces of fitting and component port are free of burrs, nicks, scratches or any foreign material.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 7 Adjustable Fitting (Fig. 8) 1. Make sure all threads and sealing surfaces of fitting and component port are free of burrs, nicks, scratches or any foreign material.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 8 Relieving Hydraulic System Pressure Before disconnecting or performing any work on the hy- draulic system, all pressure in the hydraulic system must be relieved. Park machine on a level surface, lower cutting decks fully , stop engine and engage parking brake.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 9 Hydraulic Schematic Hydraulic Schematic Groundsmaster 4300 - - D All solenoids are shown as de - - energized NOTE: A larger hydraulic schematic i.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 10 Hydraulic Flow Diagrams Figure 10 Working Pressure Low Pressure (Charge) Return or Suction Flow T raction Circuit (Forward Shown) Groundsmaster .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 1 T raction C ircuit The hydraulic traction circuit consists of a variable dis- placement piston pump (P5) connected in a closed loop, parallel circuit to four (4) orbital roller vane wheel mo- tors.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 12 Figure 1 1 Working Pressure Low Pressure (Charge) Return or Suction Flow Mow Circuit Groundsmaster 4300 - - D GEAR PUMP CROSSTRAX MANIFOLD LIFT .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 13 Mow Circuit A four section gear pump is coupled to the piston (trac- tion) pump. Gear pump sections (P1) and (P2) supply hydraulic flow for the mow circuit. These gear pumps take their suction from the hydraulic reservoir .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 14 Mow Circuit Cutting Deck Blade Braking When the operator turns the PTO switch OFF or if the decks are raised with the PTO switch ON, the deck co.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 16 Figure 16 Working Pressure Low Pressure (Charge) Return or Suction Flow Lift Circuit: Raise Cutting Decks Groundsmaster 4300 - - D GEAR PUMP CRO.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 17 Lift Circuit: Raise Cutting Decks A four section gear pump is coupled to the piston (trac- tion) pump. Gear pump section (P4) supplies hydraulic flow to the lift control manifold and lift cylinders.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 18 Figure 18 Working Pressure Low Pressure (Charge) Return or Suction Flow Lift Circuit: Lower Cutting Decks Groundsmaster 4300 - - D GEAR PUMP CRO.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 19 Lift Circuit: Lower Cutting Decks A four section gear pump is coupled to the piston (trac- tion) pump. Gear pump section (P4) supplies hydraulic flow to the lift control manifold and lift cylinders.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 20 Figure 20 Working Pressure Low Pressure (Charge) Return or Suction Flow Steering Circuit Groundsmaster 4300 - - D STEERING CYLINDER PISTON MOVEM.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 21 Steering Circuit A four section gear pump is coupled to the piston (trac- tion) pump. Gear pump section P3 supplies hydraulic flow to the steering control valve and for the traction charge circuit.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 22 Special T ools Order Special T ools from your T oro Distributor . Hydraulic Pressure T est Kit Use to take various pressure readings for diagnostic tests. Quick disconnect fittings provided attach directly to mating fittings on machine test ports without tools.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 23 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 esting section of this chapter . This tester includes the following: 1.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 24 High Flow Hydraulic Filter Kit The high flow hydraulic filter kit is designed with large flow (40 GPM/150 LPM) and high pressure (5000 PSI/345 bar) capabilities.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 25 Wheel Hub Puller The wheel hub puller allows safe removal of the wheel hub from the wheel motor shaft. T oro Part Number: TOR6004 Figure 29 Measuring Container Use this graduated container for doing hydraulic motor efficiency testing (motors with case drain lines only).
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 26 T roubleshooting The cause of an improperly functioning hydraulic sys- tem is best diagnosed with the use of proper testing equipment and a thorough understanding of the com- plete hydraulic system.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 27 T raction Circuit Problems Problem Possible Causes Neutral is difficult to find or machine operates in one direction only T raction control linkage is misadjusted, disconnected, binding or damaged.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 28 T raction Circuit Problems (Continued) Problem Possible Causes Wheel motor will not turn Brakes are binding. Wheel motor is worn or damaged (NOTE: If a traction circuit component has internal wear or damage, it is possible that other traction circuit components are also damaged).
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 29 Lift Circuit Problems Problem Possible Causes Single cutting deck raises slowly or not at all Cutting deck has excessive debris buildup. Lift arm or lift cylinder is binding. Flow control orifice in lift control manifold for the af fected cutting deck is plugged, stuck or damaged.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 30 Steering Circuit Problems Problem Possible Causes Steering inoperative or sluggish Steering components (e.g. tie rods, steering cylinder ends) are worn or binding. Steering cylinder is binding. Oil level in hydraulic reservoir is low (other hydraulic systems are affected as well).
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 32 T esting The most effective method for isolating problems in the hydraulic system is by using hydraulic test equipment such as pressure gauges and flow meters in the circuits during various operational checks (see the Special T ools section in this chapter).
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 33 Which Hydraulic T ests Are Necessary? Before beginning any hydraulic test, identify if the prob- lem is related to the traction circuit, cutting (mow) circuit, lift circuit or steering circuit. Once the faulty system has been identified, perform tests that relate to that circuit.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 34 T raction Circuit Relief V alve (R3) and (R4) Pressure T est Figure 32 GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TRACTION) PUMP VA LV E FROM .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 35 5. Connect a 5000 PSI (350 bar) pressure gauge to test port. 6. After installing pressure gauge, start engine and run at idle speed. Check for any hydraulic leakage from test connections and correct before proceeding with test.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 36 T raction Circuit Charge Pressure T est Figure 36 GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TRACTION) PUMP VA LV E FROM STEERING CONTROL V AL.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 37 4. Raise and support operator seat to allow access to hydraulic pump assembly . 5. Thoroughly clean ends of hydraulic tubes that con- nect to the oil filter (Fig. 37). Disconnect hydraulic tubes from oil filter adapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 38 Gear Pump (P3) Flow T est (Using T ester with Pressure Gauges and Flow Meter) Figure 39 GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TRACTION) P.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 39 CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen - eral Information section of this chapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 40 Front Wheel Motor Efficiency T est Figure 41 GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TRACTION) PUMP VA LV E FROM STEERING CONTROL V AL VE T.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 41 CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen - eral Information section of this chapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 42 Piston (T raction) Pump Flow T est (Using T ester with Flow Meter and Pressure Gauge) GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TRACTION) PUM.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 43 4. Make sure that traction pedal is adjusted to the neu- tral position. Also, ensure that traction pump is at full stroke when traction pedal is pushed into fully forward position.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 44 Relief V alve (PR V1) and (PRV2) Pressure T est Figure 45 GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TRACTION) PUMP DECK CONTROL MANIFOLD VA L.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 45 3. Read Precautions For Hydraulic T esting in this sec- tion. CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 46 Gear Pump (P1) and (P2) Flow T est (Using T ester with Pressure and Flow Capabilities) Figure 47 GEAR PUMP CROSSTRAX MANIFOLD BYP ASS PISTON (TR.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 47 3. Read Precautions For Hydraulic T esting in this sec- tion. CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 48 Deck Motor Efficiency T est (Using T ester with Pressure Gauges and Flow Meter) CASE DRAIN MOW CONTROL MANIFOLD MEASURING CONT AINER ROT A TION DIRECTION MOTOR OUTLET MOTOR INLET TESTER CAP Install tester in series between fitting and return hose at motor outlet.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 49 CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen - eral Information section of this chapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 50 Lift Relief V alve (PRV) Pressure T est Figure 51 GEAR PUMP LIFT CONTROL MANIFOLD TO STEERING CONTROL V AL VE PRESSURE GAUGE INTERNAL CASE DRAIN.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 51 5. Thoroughly clean test port ( G4) on bottom of lift con- trol manifold. Connect a 5000 PSI (350 bar) pressure gauge to test port. 6. After installing pressure gauge to manifold test port, start engine and run at idle speed.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 52 Gear Pump (P4) Flow T est (Using T ester with Pressure Gauges and Flow Meter) Figure 53 GEAR PUMP LIFT CONTROL MANIFOLD TO STEERING CONTROL V AL.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 53 4. Raise and support operator seat to allow access to hydraulic pump. 5. Thoroughly clean both ends of the hydraulic hose that connects gear pump (P4) outlet (Fig. 54) and lift control manifold P4 port.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 54 Lift Cylinder Internal Leakage T est Figure 55 LEFT FRONT (#4) LIFT CYLINDER TEST SHOWN GEAR PUMP LIFT CONTROL MANIFOLD TO STEERING CONTROL V AL.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 55 IMPORT ANT : W hen capping lift cylinder fitting and hydraulic hose end, use a steel cap and plug to en- sure that fluid leakage will not occur . Plastic plugs will not hold hydraulic pressure that will be devel - oped during this test procedure.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 56 Steering Relief V alve (R10) Pressure T est Figure 59 STEERING WHEEL TURNED FOR RIGHT TURN OUT IN V1 R L STEERING R10 TP CYLINDER CONTROL STEERI.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 57 The steering relief valve (R10) pressure test should be performed to make sure that the steering circuit relief pressure is correct.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 58 Steering Cylinder Internal Leakage T est Figure 61 STEERING CYLINDER STEERING CONTROL VA LV E (FULL Y EXTENDED) LOOK FOR LEAKAGE CAP STEERING WHEEL TURNED FOR RIGHT TURN R10 The steering cylinder internal leakage test should be performed if a steering problem is identified.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 59 Procedure for Steering Cylinder Internal Leakage T est: 1. Make sure hydraulic oil is at normal operating tem- perature. 2. Park machine on a level surface with the cutting decks lowered and PTO switch off.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 60 Service and Repairs General Precautions for Removing and Installing Hydraulic System Components Before Repair or Replacement of Components 1. Before removing any parts from the hydraulic sys- tem, park machine on a level surface, engage parking brake, lower cutting decks and stop engine.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 61 Check Hydraulic Lines and Hoses Keep body and hands away from pin hole leaks or nozzles that eject hydraulic fluid under high pressure.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 62 Filtering Closed - - Loop T raction Circuit Filtering of a closed - - loop hydraulic system after a major component failure (e.g. traction (piston) pump or wheel motor) is a requirement to prevent debris from transmit- ting throughout the system.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 63 Hydraulic System Start - - up NOTE: When initially starting the hydraulic system with new or rebuilt components such as pumps, wheel mo- tors or lift cylinders, it is important that this start - - up pro- cedure be used.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 64 Hydraulic Reservoir 1. Suction strainer 2. T ank cap 3. Hydraulic reservoir 4. Adapter 5. Manifold 6. O - - ring 7. Hydraulic hose 8. O - - ring 9. Cap screw 10. Flat washer 1 1. Bumper 12. Washer head screw (2 used) 13.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 65 Removal (Fig. 64) 1. Park the machine on a level surface, engage parking brake, lower cutting decks and stop engine. Remove key from the ignition switch. 2. Thoroughly clean hydraulic hose ends and fittings on hydraulic reservoir to prevent hydraulic system conta- mination.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 66 Hydraulic Pump Drive Shaft 1. Piston (traction) pump 2. Flange nut (2 used) 3. Flange head screw (2 used) 4. Guard hoop 5. Cap screw (2 used) 6. Engine flywheel 7. Cap screw (6 used) 8. Drive shaft assembly 9.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 67 Removal (Fig. 65) 1. Park the machine on a level surface, engage parking brake, lower cutting decks and stop engine. Remove key from the ignition switch. 2. Remove two (2) flange head screws and flange nuts that secure drive shaft guard hoop (item 4) to machine frame.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 68 Hydraulic Pump Assembly 1. Drive shaft assembly 2. Cap screw (2 used) 3. Flange head screw (2 used) 4. Hydraulic pump assembly 5. O - - ring 6. 90 o hydraulic fitting (2 used) 7. Hydraulic hose (2 used) 8.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 69 NOTE: T raction pump and gear pump should be re- moved from machine as an assembly . Once removed from machine, pumps can be separated for service. Removal (Fig. 67) 1. Park the machine on a level surface, engage parking brake, lower cutting decks and stop engine.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 70 9. Loosen and remove two (2) carriage screws (item 12) and flange nuts (item 15) that secure pump support bracket (item 8) to frame. 10. Remove two (2) flange screws (item 3) and flange nuts (item 9) that secure traction pump flange to ma- chine frame.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 72 Piston (T raction) Pump Service 1. T raction pump housing 2. Auxiliary shaft 3. Retaining ring 4. Ball bearing 5. Retaining ring 6. Seal 7. Backup washer 8. Bearing 9. O - - ring 10. T runnion cover 1 1.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 74 Gear Pump Service 1. Front cover 2. Dowel pin (16 used) 3. Square section seal (8 used) 4. Back - - up ring (8 used) 5. Pressure seal (8 used) 6. Thrust plate (8 used) 7. Drive shaft 8. Driven gear (2 used) 9.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 75 IMPORT ANT : Mark the relative positions of the gear teeth and the thrust plates so they can be reassem- bled in the same position. Do not touch the gear sur- faces as residue on hands may be corrosive to gear finish.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 76 Front Wheel Motors 1. LH wheel motor 2. Lug nut (5 used per wheel) 3. Hub 4. Wheel assembly 5. Hydraulic fitting (2 used per motor) 6. Hydraulic tube 7. Hydraulic tube 8. Cap screw (2 used per wheel shield) 9.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 77 CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen - eral Information section of this chapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 78 6. Install new lock nut (item 17) onto the wheel motor shaft to secure wheel hub to motor shaft. 7. Remove caps or plugs from disconnected hydraulic lines and fittings. 8. Lubricate and position new O- - rings to fittings on wheel motor .
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 80 Rear Wheel Motors 1. Lug nut (5 used per wheel) 2. Rear axle assembly 3. Hydraulic fitting (2 used per motor) 4. Wheel assembly 5. Tie rod 6. Wheel stud (5 used per hub) 7. O - - ring 8. Woodruff key 9.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 81 Removal (Fig. 75) CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen - eral Information section of this chapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 82 8. Place wheel hub on motor shaft and secure with new lock nut (item 14). 9. Install wheel assembly to the machine and secure with five (5) lug nuts.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 84 Wheel Motor Service 1. Cap screw (7 used) 2. End cover 3. Body seal (5 used) 4. Commutator ring 5. Commutator 6. Commutator ring 7. Manifold 8. Stator 9. Vane (7 used) 10. Rotor 1 1. Wear plate 12.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 86 CrossT rax TM AW D M a n i f o l d 1. A WD manifold 2. Hydraulic tube 3. Hydraulic tube 4. Hydraulic tube 5. O - - ring 6. Hydraulic fitting (7 used) 7. O - - ring 8. Dust cap (2 used) 9. Diagnostic fitting (2 used) 10.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 87 6. Put caps or plugs on disconnected lines and fittings to prevent contamination. 7. Support manifold to prevent it from falling. Remove three (3) cap screws and lock washers that secure man- ifold to machine frame.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 88 CrossT rax TM A WD Manifold Service 1. A WD manifold 2. O - - ring 3. Plug (zero leak #6) 4. Seal kit 5. Check valve 6. Plug (zero leak #4) 7. O - - ring 8. Orifice (.040) 9. Plug (zero leak #8) 10.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 90 Deck Control Manifold 1. Deck control manifold 2. O - - ring 3. Diagnostic fitting 4. Dust cap 5. Hydraulic tube 6. O - - ring 7. Hydraulic hose 8. O - - ring 9. Hydraulic tube 10. Flange head screw (3 used) 1 1.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 91 Removal (Fig. 79) 1. Park the machine on a level surface, engage parking brake, lower cutting decks and stop engine.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 92 Deck Control Manifold Service 1. Deck control manifold 2. Logic element (LC1/LC2) 3. Proportional relief valve (PRV1/PRV2) 4. Solenoid coil 5. Nut 6. Plug (zero leak #4) 7. O - - ring 8. Plug (zero leak #8) 9.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 93 NOTE: The deck control manifold uses several zero leak plugs. These plugs have a tapered sealing surface on the plug head that is designed to resist vibration in- duced plug loosening. The zero leak plugs also have an O - - ring to provide a secondary seal.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 94 Cutting Deck Motor 1. Hydraulic deck motor (#4) 2. O - - ring 3. 90 o hydraulic fitting 4. O - - ring 5. Hydraulic hose 6. O - - ring 7. 45 o hydraulic fitting 8. O - - ring 9. Hydraulic hose 10.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 95 5. Put caps or plugs on disconnected hoses and fittings to prevent contamination. 6. Remove two (2) socket head screws and flat wash- ers that secure hydraulic motor to the cutting deck (Fig. 84).
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 96 Cutting Deck Motor Service Figure 86 (45 N - - m) 33 ft - - lb (35 N - - m) 26 ft - - lb (35 N - - m) 26 ft - - lb 2 3 6 8 9 10 11 13 1 5 7 12 14 15 16 17 18 19 4 1. Dust seal 2. Retaining ring 3.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 97 4. Loosen cap screws from the rear cover . 5. Remove motor from the vise. T urn motor so that the shaft end is facing down. Remove cap screws. 6. Separate rear cover from body . Lift rear cover from motor .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 98 Assembly (Fig. 86) NOTE: When assembling the motor , check the marker line on each part to make sure the parts are properly aligned during assembly . 1. Lubricate O - - rings, pressure seals, back - - up gaskets and wear plate grooves with a thin coat of petroleum jel- ly .
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 100 Lift Control Manifold 1. Lift control manifold 2. Flange head screw (2 used) 3. O - - ring 4. Hydraulic hose 5. Hydraulic hose 6. Hydraulic hose 7. Hydraulic hose 8. Hydraulic hose 9. Hydraulic hose 10.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 101 W ARNING Make sure that cutting decks are fully lowered before loosening hydraulic lines, cartridge valves or plugs from lift control manifold. If decks are not fully lowered as manifold compo - nents are loosened, decks may drop unexpect- edly .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 102 Lift Control Manifold Service 1. Lift control manifold 2. Solenoid valve (S1) 3. Solenoid valve (S2) 4.
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Groundsmaster 4300 - - D Hydraulic System Page 4 - - 104 Lift Cylinder 1. Lift cylinder 2. Pivot shaft 3. Flange head screw 4. Lift arm (#1 shown) 5. Flat washer 6. Hydraulic hose 7. O - - ring 8. 90 o hydraulic fitting 9. O - - ring 10. Hydraulic hose 1 1.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 105 3. If lift cylinder for deck #4 or #5 is being removed, re- move flange nut and carriage screw that secure r - - clamp to lift cylinder (Fig. 95). 4. Label all hydraulic connections for assembly pur- poses.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 106 Lift Cylinder Service 1. Grease fitting 2. Shaft 3. Dust seal 4. Head 5. Head seal 6. Retaining ring 7. Back up washer 8. O - - ring 9. Piston 10. Piston seal 11 . O - - r i n g 12. Grease fitting 13.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 107 Disassembly (Fig. 96) 1. Remove oil from lift cylinder into a drain pan by slowly pumping the cylinder shaft. Plug both ports and clean the outside of the cylinder . IMPORT ANT : Prevent damage when clamping the lift cylinder into a vise; clamp on the clevis end of the barrel ONL Y .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 108 Steering Control V alve 1. Steering column 2. Hydraulic fitting (4 used) 3. Steering wheel 4. Steering wheel cover 5. Gear pump 6. Socket head screw (4 used) 7. Flange nut 8. O - - ring 9. Hydraulic tube 10.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 109 CAUTION Before opening hydraulic system, operate all hy - draulic controls to relieve system pressure and avoid injury from pressurized hydraulic oil. See Relieving Hydraulic System Pressure in the Gen - eral Information section of this chapter .
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 10 Steering Control V alve Service 1. Screw (5 used) 2. O - - ring (5 used) 3. End cover 4. O - - ring 5. Outer gearwheel 6. Inner gearwheel 7. Distributor plate 8. O - - ring 9. Cardan shaft 10. Spool 1 1.
Groundsmaster 4300 - - D Hydraulic System P a g e 4 - - 111 This page is intentionally blank. Hydraulic System.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 12 Steering Cylinder 1. Lug nut (5 used per wheel) 2. Rear axle assembly 3. Hydraulic fitting (2 used per motor) 4. Hydraulic fitting (2 used) 5. Tie rod 6. Axle pivot pin 7. Thrust washer 8. Roll pin 9.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 13 Removal (Fig. 101) 1. Park the machine on a level surface, engage the parking brake, lower the cutting decks and stop the en- gine.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 14 Steering Cylinder Service 1. Front shaft (1”) 2. Rear shaft (1.250”) 3. Front head (1”) 4. Rear head (1.250”) 5. Roll pin 6. Dust seal 7. O - - ring 8. External collar (2 used) 9. Piston 10.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 15 Inspection CAUTION Use eye protection such as goggles when using compressed air . 1. W ash all cylinder components in solvent. Dry parts with compressed air . 2. Inspect internal surface of barrel for deep scratches, out - - of - - roundness and bending.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 16 Oil Cooler 1. Screen assembly 2. Oil cooler bracket 3. Flange head screw (8 used) 4. Foam seal (2 used) 5. Draw latch 6. Rivet (2 used) 7. Oil cooler 8. Hydraulic hose (2 used) 9. 90 o hydraulic fitting (2 used) 10.
Groundsmaster 4300 - - D Hydraulic System Page 4 - - 1 17 Removal (Fig. 104) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Unlatch and open the rear screen. 3. Label all hydraulic connections for assembly pur- poses.
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Groundsmaster 4300 - - D Page 5 - - 1 Electrical System Chapter 5 Electrical System T able of Contents GENERAL INFORMA TION 3 ..................... Operator ’s Manual 3 .......................... T oro Electronic Controller (TEC) 3 ............... CAN - - bus Communications 3 .
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Groundsmaster 4300 - - D Page 5 - - 3 Electrical System General Information Operator ’s Manual The Operator ’s Manual provides information regarding the operation, general maintenance and maintenance intervals for your Groundsmaster 4300 - - D machine.
Groundsmaster 4300 - - D Page 5 - - 4 Electrical System Special T ools Order Special T ools from your T oro Distributor . Some tools may be available locally . Multimeter The multimeter can test electrical components and cir- cuits for current, resistance or voltage.
Groundsmaster 4300 - - D Page 5 - - 5 Electrical System Diagnostic Display The Diagnostic D isplay (Fig. 4) can be connected to the wiring harness connector located inside the control arm to verify correct electrical functions of the machine. TEC controller inputs and outputs can be checked using the Diagnostic Display .
Groundsmaster 4300 - - D Page 5 - - 6 Electrical System T roubleshooting CAUTION Remove all jewelry , especially rings and watches, before doing any electrical trouble- shooting or testing. Disconnect the battery cables unless the test requires battery voltage.
Groundsmaster 4300 - - D Page 5 - - 7 Electrical System Retrieving Fault Codes All machine fault codes are retained in the TEC control- ler memory . The three (3) most recent fault codes that have occurred within the last forty (40) hours of opera- tion can be retrieved using the diagnostic light.
Groundsmaster 4300 - - D Page 5 - - 8 Electrical System Diagnostic Display Groundsmaster 4300 - - D machines are equipped with a TEC controller which controls machine electrical func- tions. The controller monitors various input switches (e.g. ignition switch, seat switch, etc.
Groundsmaster 4300 - - D Page 5 - - 9 Electrical System 5. The “INPUTS DISPLA YED” LED, on lower right c ol- umn of the Diagnostic Display , should be illuminated. If the green “OUTPUTS DISPLA YED” LED is illuminated, press the toggle button on the Diagnostic Display to change to “INPUTS DISPLA YED” LED.
Groundsmaster 4300 - - D Page 5 - - 10 Electrical System V erify Diagnostic Display Output Functions The Diagnostic Display also has the ability to detect which output solenoids or relays are turned on by the TEC controller . This is a quick way t o determine if a ma- chine malfunction is electrical or hydraulic.
Groundsmaster 4300 - - D Page 5 - - 1 1 Electrical System TEC Controller Logic Chart Each line of the following chart identifies the necessary component position (INPUTS) in order for the TEC con- troller to energize the appropriate OUTPUTS for ma- chine operation.
Groundsmaster 4300 - - D Page 5 - - 12 Electrical System Starting Problems Problem Possible Causes No electrical power to machine (including gauges). Battery is discharged. Ignition switch or circuit wiring is faulty . Fusible link harness at the engine starter motor is faulty .
Groundsmaster 4300 - - D Page 5 - - 13 Electrical System Starting Problems (Continued) Problem Possible Causes Engine cranks, but should not, when the traction pedal is depressed. T raction neutral switch is out of adjustment. T raction neutral switch or circuit wiring is faulty .
Groundsmaster 4300 - - D Page 5 - - 14 Electrical System General Run and T ransport Problems Problem Possible Causes Engine continues to run, but should not, when the ignition switch is turned off. Engine fuel stop solenoid is faulty . Ignition switch or circuit wiring is faulty .
Groundsmaster 4300 - - D Page 5 - - 15 Electrical System Cutting Deck Operating Problems Problem Possible Causes The cutting decks remain engaged, but should not, with no operator in the seat. Seat switch or circuit wiring is faulty . TEC controller is faulty .
Groundsmaster 4300 - - D Page 5 - - 16 Electrical System Cutting Deck Operating Problems (Continued) Problem Possible Causes The rear cutting decks do not operate. Front cutting decks operate. Cutting decks are able to raise and lower . Deck control manifold PRV1 solenoid coil or circuit wiring is faulty .
Groundsmaster 4300 - - D Page 5 - - 17 Electrical System Electrical System Quick Checks Battery T est (Open Circuit T est) Use a digital multimeter to measure the battery voltage. Set the multimeter to the DC volts setting. The battery should be at a temperature of 60 o to 100 o F( 1 6 o to 38 o C).
Groundsmaster 4300 - - D Page 5 - - 18 Electrical System Check Operation of Interlock Switches CAUTION The interlock switches are for the protection of the operator and bystanders and to ensure cor - rect operation of the machine. Do not bypass or disconnect switches.
Groundsmaster 4300 - - D Page 5 - - 19 Electrical System Adjustments T raction Neutral Switch The traction neutral switch is a normally open proximity switch that closes when the traction pedal is in the neu- tral position. The switch mounts to a bracket on the trac- tion pump (Fig.
Groundsmaster 4300 - - D Page 5 - - 20 Electrical System Parking Brake Switch The parking brake switch is a normally open proximity switch. The parking brake switch is attached to the bot- tom of the brake pedal (Fig.
Groundsmaster 4300 - - D Page 5 - - 21 Electrical System Mow/T ransport Switch The mow/transport switch is a normally closed proximity switch that opens when the mow speed limiter is placed in the transport position. The switch mounts to a bracket on the footrest platform (Fig.
Groundsmaster 4300 - - D Page 5 - - 22 Electrical System Component T esting For accurate resistance and/or continuity checks, elec- trically disconnect the component being tested from the circuit (e.g. unplug the ignition switch connector before doing a continuity check of the switch).
Groundsmaster 4300 - - D Page 5 - - 23 Electrical System Indicator Lights Glow Plug Indicator Light The glow plug indicator light should come on when the ignition switch is placed in the RUN position prior to plac- ing the ignition switch in ST ART .
Groundsmaster 4300 - - D Page 5 - - 24 Electrical System Hour Meter The hour meter is located on the outside of the control arm. 1. Remove control arm covers to gain access to hour meter and meter terminals (see Control Arm Disassem- bly in the Service and Repairs section of Chapter 6 - - Chassis).
Groundsmaster 4300 - - D Page 5 - - 25 Electrical System PT O Switch The PTO switch is mounted on the control panel and al- lows the cutting decks to operate when the front of the switch is depressed. An indicator light on the switch identifies when the PTO switch is engaged.
Groundsmaster 4300 - - D Page 5 - - 26 Electrical System Headlight Switch The headlight switch is located on the operator side of the control arm. This rocker switch allows the headlights to be turned on and off.
Groundsmaster 4300 - - D Page 5 - - 27 Electrical System Seat Switch The seat switch is normally open and closes when the operator seat is occupied. This switch is used as an in- put for the TEC controller . If the traction system or PTO switch is engaged when the operator raises out of the seat, the engine will stop.
Groundsmaster 4300 - - D Page 5 - - 28 Electrical System Joystick Raise and Lower Switches T wo (2) micro switches for the joystick are located on the lift control that is attached to the control arm. The rear switch on the control is used to lower (and engage) the cutting decks and the front switch to raise (and disen- gage) them.
Groundsmaster 4300 - - D Page 5 - - 29 Electrical System T raction Neutral Switch The traction neutral switch is a normally open proximity switch that closes when the traction pedal is in the neu- tral position. The switch mounts to a bracket on the trac- tion pump (Fig.
Groundsmaster 4300 - - D Page 5 - - 30 Electrical System Parking Brake Switch The parking brake switch is a normally open proximity switch. The parking brake switch is attached to the bot- tom of the brake pedal (Fig. 32). The parking brake switch is used as an input for the TEC controller .
Groundsmaster 4300 - - D Page 5 - - 31 Electrical System Mow/T ransport Switch The mow/transport switch is a normally closed proximity switch that opens when the mow speed limiter is placed in the transport position. The switch mounts to a bracket on the footrest platform.
Groundsmaster 4300 - - D Page 5 - - 32 Electrical System Start Relay The start relay is used in the engine starting circuit. When energized by the TEC controller , the start relay provides a current path to energize the engine starter solenoid.
Groundsmaster 4300 - - D Page 5 - - 33 Electrical System Main Power and Glow Relays The Groundsmaster electrical system includes two identical relays for current control. The main power and glow relays are attached to a frame bracket under the hood next to the hydraulic pump drive shaft (Fig.
Groundsmaster 4300 - - D Page 5 - - 34 Electrical System T oro Electronic Controller (TEC) The Groundsmaster 4300 - - D uses a T oro Electronic Controller (TEC) to monitor the condition of various switches (inputs) and then direct power output to allow certain machine functions.
Groundsmaster 4300 - - D Page 5 - - 35 Electrical System Fuses The fuse block is located behind the control arm access cover (Fig. 39). In addition to the fuses in the fuse block, a 2 amp fuse (F3) is included in the wire harness to protect the logic power circuit for the TEC controller .
Groundsmaster 4300 - - D Page 5 - - 36 Electrical System Diode Assembly A diode assembly (Fig. 42) is used in the Groundsmas- ter 4300 - - D engine wire harness. The diode is used for circuit protection from voltage spikes that occur when the engine starter solenoid is de - - energized.
Groundsmaster 4300 - - D Page 5 - - 37 Electrical System Fusible Link Harness The Groundsmaster 4300 - - D uses four (4) fusible links for circuit protection. Three (3) of these fusible links are located in a harness that connects the starter B+ termi- nal to the wire harness (Figs.
Groundsmaster 4300 - - D Page 5 - - 38 Electrical System Hydraulic Solenoid V alve Coil The Groundsmaster 4300 - - D hydraulic system uses several hydraulic solenoid valve coils for system control. The deck control manifold includes two (2) solenoid valves (Fig.
Groundsmaster 4300 - - D Page 5 - - 39 Electrical System T emperature Sender The temperature sender is attached to the water pump housing on the engine and has a gray wire attached to it (Fig. 48). The resistance of the temperature sender re- duces as the engine coolant temperature increases.
Groundsmaster 4300 - - D Page 5 - - 40 Electrical System High T emperature Shutdown Switch The high temperature shutdown switch is located on the water pump housing (Fig. 50). The high temperature shutdown switch is normally open and closes when en- gine coolant temperature reaches approximately 239 o F (1 15 o C).
Groundsmaster 4300 - - D Page 5 - - 41 Electrical System Oil Pressure Switch The engine oil pressure switch is located on the engine near the oil filter (Fig.52). The oil pressure switch is a normally closed switch that opens with pressure. The oil pressure switch should open at approximately 8 PSI (0.
Groundsmaster 4300 - - D Page 5 - - 42 Electrical System Fuel Stop Solenoid The fuel stop solenoid used on your Groundsmaster must be energized for the diesel engine to run. The sole- noid is mounted to the injection pump on the engine (Fig. 53). The TEC controller monitors the operation of the fuel stop solenoid.
Groundsmaster 4300 - - D Page 5 - - 43 Electrical System Fuel Pump The fuel pump used on the Groundsmaster 4300 - - D is attached to the inside of the left side frame rail near the fuel tank (Fig. 55). IMPORT ANT : When t esting fuel pump, make sure that pump is not operated without fuel.
Groundsmaster 4300 - - D Page 5 - - 44 Electrical System Service and Repairs NOTE: See the Kubota Workshop Manual, Diesel En- gine, 05 - - E3B Series at the end of Chapter 3 - - Kubota Diesel Engine for engine electrical component repair in- formation.
Groundsmaster 4300 - - D Page 5 - - 45 Electrical System Battery Service The battery is the heart of the electrical system. With regular and proper service, battery life can be extended. Additionally , battery and electrical component failure can be prevented.
Groundsmaster 4300 - - D Page 5 - - 46 Electrical System Battery T esting 1. Conduct a hydrometer test of the battery electrolyte. IMPORT ANT : Make sure the area around the cells is clean before opening the battery caps. A. Measure the specific gravity of each cell with a hydrometer .
Groundsmaster 4300 - - D Page 5 - - 47 Electrical System Battery Charging T o minimize possible damage to the battery and allow the battery to be fully charged, the slow charging meth- od is presented here. This charging method can be ac- complished with a constant current battery charger which is commonly available.
Groundsmaster 4300 - - D Page 5 - - 48 Electrical System Hydraulic Solenoid V alve Coil A hydraulic solenoid valve coil on the deck control man- ifold (Fig. 58) or lift control manifold (Fig. 59) can be re- placed without opening the hydraulic system.
Groundsmaster 4300 - - D Page 6 - - 1 Chassis Chapter 6 Chassis T able of Contents SPECIFICA TIONS 2 ............................. GENERAL INFORMA TION 2 ..................... Operator ’s Manual 2 .......................... SPECIAL TOOLS 2 .........
Groundsmaster 4300 - - D Page 6 - - 2 Chassis Specifications Item Description Front T ire Pressure 12 to 15 PSI (83 to 103 kPa) (26.5 x 14.0 - - 12, 4 ply , tubeless) Rear T ire Pressure 12 to 15 PSI (83 to 103 kPa) (20 x 12.
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Groundsmaster 4300 - - D Page 6 - - 4 Chassis Service and Repairs Wheels 1. Front wheel motor (LH shown) 2. Brake assembly (LH shown) 3. Front wheel hub 4. Lock nut 5. Brake drum 6. Front wheel 7. Lug nut (5 used per wheel) 8. Rear wheel motor (LH shown) 9.
Groundsmaster 4300 - - D Page 6 - - 5 Chassis Removal (Fig. 2) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Chock wheels to prevent machine from shifting. 3. Loosen wheel lug nuts.
Groundsmaster 4300 - - D Page 6 - - 6 Chassis Steering Column 1. Steering column 2. Hydraulic fitting (4 used) 3. Steering wheel 4. Steering wheel cover 5. Gear pump 6. Socket head screw (4 used) 7. Flange nut 8. O - - ring 9. Hydraulic tube 10. Hydraulic tube 1 1.
Groundsmaster 4300 - - D Page 6 - - 7 Chassis 5. Remove platform shroud from machine to allow ac- cess to steering column fasteners (Fig. 4). A. Remove cov er plate from platform. B. Remove fasteners that secure shroud to ma- chine. C. Remove shroud from machine.
Groundsmaster 4300 - - D Page 6 - - 8 Chassis Brake Service 1. LH wheel motor 2. Lug nut (5 used per wheel) 3. Hub 4. Wheel assembly 5. Hydraulic fitting (2 used per motor) 6. Hydraulic tube 7. Hydraulic tube 8. Cap screw (2 used per wheel shield) 9. O - - ring 10.
Groundsmaster 4300 - - D Page 6 - - 9 Chassis 6. Remove return spring and clevis pin t hat secure brake cable to brake actuator lever . Position brake cable end away from lever . 7. Remove brake drum. IMPORT ANT : DO NOT hit wheel hub, puller or wheel motor with a hammer during wheel hub removal or installation.
Groundsmaster 4300 - - D Page 6 - - 10 Chassis Rear Axle Motor Housings 1. Lug nut (5 used per wheel) 2. Rear axle 3. Motor housing (2 used) 4. RH drag link 5. Tie rod 6. O - - ring 7. Hydraulic fitting (2 used per motor) 8. O - - ring 9. Slotted hex nut 10.
Groundsmaster 4300 - - D Page 6 - - 1 1 Chassis Removal (Fig. 8) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Chock front wheels to prevent machine from shifting.
Groundsmaster 4300 - - D Page 6 - - 12 Chassis Rear Axle 1. Lug nut (5 used per wheel) 2. Rear axle assembly 3. Hydraulic fitting (2 used per motor) 4. Hydraulic fitting (2 used) 5. Tie rod assembly 6. Axle pivot pin 7. Thrust washer 8. Roll pin 9. Thrust washer 10.
Groundsmaster 4300 - - D Page 6 - - 13 Chassis Rear Axle Removal (Fig. 9) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Chock front wheels to prevent machine from shifting.
Groundsmaster 4300 - - D Page 6 - - 14 Chassis Rear Axle Installation (Fig. 9) 1. Position the rear axle assembly to the frame. Install thrust washer (item 7) between each side of axle and frame. Slide pivot pin through frame, thrust washers and axle.
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Groundsmaster 4300 - - D Page 6 - - 16 Chassis Control Arm 1. Arm rest 2. Headlight switch 3. LH control arm cover 4. Screw (2 used) 5. Lock nut 6. Screw 7. RH control arm cover 8. Bushing 9. Control arm assembly 10. Seat wire harness 1 1. Clevis pin 12.
Groundsmaster 4300 - - D Page 6 - - 17 Chassis Disassembly (Fig. 12) 1. Park machine on a level surface, lower cutting decks, stop engine and engage parking brake. Remove key from ignition switch. 2. Loosen latches and remove access cover from out- side of control arm.
Groundsmaster 4300 - - D Page 6 - - 18 Chassis Operator Seat 1. Seat 2. Seat base 3. Seat adjuster w/latch 4. Flat washer (4 used) 5. Seat switch harness 6. Seat switch 7. Washer head screw (2 used) 8. Armrest bracket 9. Spacer 10. Armrest 1 1. Cap screw 12.
Groundsmaster 4300 - - D Page 6 - - 19 Chassis Removal (Fig. 15) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Disconnect negative battery cable from battery (see Battery Service in the Service and Repairs section of Chapter 5 - - Electrical System).
Groundsmaster 4300 - - D Page 6 - - 20 Chassis Mechanical Seat Suspension 1. Upper housing 2. Weight adjust knob 3. Lower housing 4. Scissor assembly 5. Lock nut 6. Weight adjuster 7. Drive arm 8. Extension spring (2 used) 9. Roller guide 10. Weight adjust knob 11 .
Groundsmaster 4300 - - D Page 6 - - 21 Chassis IMPORT ANT : When removing t he seat suspension, make sure to support the control arm to prevent damage to the throttle cable, control arm electrical components and control arm wiring harness. Removal (Figs.
Groundsmaster 4300 - - D Page 6 - - 22 Chassis Front Lift Arms 1. #1 lift arm 2. Flange bushing (2 used per lift arm) 3. Roll pin (1 used per lift arm) 4. #4 lift arm 5. #5 lift arm 6. Flange nut (2 used) 7. RH tipper bracket 8. LH tipper bracket 9. Cap screw (2 used) 10.
Groundsmaster 4300 - - D Page 6 - - 23 Chassis Removal (Fig. 20) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch.
Groundsmaster 4300 - - D Page 6 - - 24 Chassis Rear Lift Arms 1. Bridge plate 2. #2 lift arm 3. #3 lift arm 4. Cap screw 5. Thrust washer (2 used) 6. Cap screw (2 used) 7. Flange nut 8. Flange head screw 9. Lift arm pivot shaft (2 used) 10. Flat washer (2 used) 1 1.
Groundsmaster 4300 - - D Page 6 - - 25 Chassis C. Remove screw that secures r - - clamp to lift arm. Position r - - clamp and hydraulic hoses away from lift arm. D. Pivot lift cylinder rod end away from lift arm. 4. Remove fasteners that secure bridge plate (item 1) and bulkhead bracket (item 16) to machine.
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Groundsmaster 4300 - - D Cutting Decks Page 7 - - 1 Chapter 7 Cutting Decks T able of Contents SPECIFICA TIONS 2 ............................. GENERAL INFORMA TION 3 ..................... Operator ’s Manual 3 .......................... TROUBLESHOOTING 4 .
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 2 Specifications MOUNTING: All cutting decks are supported by inde- pendent lift arms and are interchangeable to any cutting deck positions.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 3 General Information CAUTION Never install or work on the cutting decks or lift arms with the engine running.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 4 T roubleshooting There are a number of factors that can contribute to un- satisfactory quality of cut, some of which may be turf conditions.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 5 Special T ools Order special tools from your T oro Distributor . Rear Roller Bearing and Seal Installation T ools These tools are used to assemble the cutting deck rear roller .
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 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 cutting decks on the Groundsmaster 4300 - - D.
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Groundsmaster 4300 - - D Cutting Decks Page 7 - - 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 Assembly 1. Flange nut (6 used) 2.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 9 Removal (Fig. 3) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Remove two (2) socket head screws and flat wash- ers that secure hydraulic motor to the cutting deck (Fig.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 10 Blade Spindle Service Disassembly (Fig. 5) 1. Remove blade spindle from cutting deck (see Blade Spindle Removal in this section). 2. Loosen and remove spindle nut from top of spindle shaft. 3. Remove the spindle shaft from the spindle housing which may require the use of an arbor press.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 1 1 3. Using an arbor press, push the bearing cups into the top and bottom of the spindle housing. The top bearing cup must contact the outer bearing spacer previously installed, and the bottom bearing cup must contact the large snap ring.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 12 Rear Roller 1. Deck frame 2. Rear roller assembly 3. Grease fitting 4. Roller shaft screw 5. Roller mount 6.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 13 Removal (Fig. 9) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. If cutting deck is equipped with a roller scraper (Fig.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 14 Rear Roller Service Disassembly (Fig. 1 1) 1. Remove bearing lock nut from each end of roller shaft. 2. Loosely secure roller assembly in bench vise and lightly tap one end of roller shaft until outer seals and bearing are removed from opposite end of roller tube.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 15 3. From the roller tube end with only the inner seal installed, carefully install the roller shaft into the roller tube. Make sure that seals are not damaged as shaft is installed. 4. Install new bearing and outer seals into second end of roller tube: A.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 16 Front Roller Service Disassembly (Fig. 17) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking brake and remove key from the ignition switch. 2. Remove front roller mounting bolt.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 17 This page is intentionally blank. Cutting Decks.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 18 Cutting Deck Carrier Frame 1. Carrier frame 2. Lynch pin 3. Thrust washer 4. Pivot shaft 5. Lift arm (#4 shown) 6. Flange nut (2 used per deck) 7. Cutting deck assembly 8. Cap screw (4 used per deck) 9.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 19 Removal (Fig. 18) Each cutting deck is suspended from a c arrier frame. The cutting deck carrier frame is attached to the lift arm and allows the cutting deck to pivot on the lift arm pivot shaft. Cutting deck positions are identified in Figure 19.
Groundsmaster 4300 - - D Cutting Decks Page 7 - - 20 This page is intentionally blank..
Groundsmaster 4300 - - D Foldout Drawings Page 8 - - 1 Chapter 8 Foldout Drawings T able of Contents HYDRAULIC SCHEMA TIC 3 ..................... ELECTRICAL SCHEMA TIC 4 ..................... Sheet 1 of 2 4 ................................ Sheet 2 of 2 5 .
Groundsmaster 4300 - - D Foldout Drawings Page 8 - - 2 This page is intentionally blank..
Page 8 - - 3 Hydr aulic S chem atic Groundsmaster 4300 - - D GEAR PUMP CROSSTRAX MANIFO LD LIFT CONTROL MANIFO LD BYP ASS PISTO N (TRACTION) PUMP DECK CONTROL MANIFO LD VA LV E STEERI NG CONTROL VA LV.
Page 8 - - 4 Electr ical Schematic Groundsmaster 4300 - - D All r elays and so lenoid s are shown as de - - energized. All gr ound wir es are black. Sheet 1 of 2.
Page 8 - - 5 Electr ical Schematic Groundsmaster 4300 - - D All r elays and so lenoid s are shown as de - - energized. All gr ound wir es are black. Sheet 2 of 2 (PRV 2) (PRV 1) TORO ELECTRONIC CONTRO.
Page 8 - - 6 Groundsmaster 4300 - - D Main Wire Har ness Drawing.
Page 8 - - 7 Groundsmaster 4300 - - D Ma in Wire H arn e ss D ia g ram BLACK PINK BLACK BLACK BLACK BLACK RED ORANGE BLACK RED RED PINK RED VIOLET/BLACK BLUE WHITE BLUE RED RED BLACK BLACK ORANGE RED/.
Page 8 - - 8 Groundsmaster 4300 - - D Seat Wir e Harness Dr awing NOTE CLOCK POSITION.
Page 8 - - 9 Groundsmaster 4300 - - D Sea t Wi re Harn e ss D ia g ram T AN/BL ACK GRA Y ORANGE BLACK GRA Y BLUE PINK BLACK RED PINK RED WHITE RED RED/WHI TE BLACK BLACK VIOLET/BLACK YELLO W BLACK BRO.
Page 8 - - 10 Groundsmaster 4300 - - D Engi ne Wir e Har ness Dr awing.
Page 8 - - 1 1 Groundsmaster 4300 - - D Engi ne Wir e Har ness Dia gram PINK GRA Y WHITE GREEN/WH ITE WHITE ORANGE RED BLACK RED/BL ACK BLACK BLUE TA N BLUE FUSIBLE LINK.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Toro 4300-D è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Toro 4300-D - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Toro 4300-D imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Toro 4300-D ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Toro 4300-D, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Toro 4300-D.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Toro 4300-D. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Toro 4300-D insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
