Toro 4300-D manual

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. REFE R TO THE O PERA TOR’S MANUAL F OR OPE R- A TING , M AINT ENA NCE AND[...]

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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 ........................... Mai[...]

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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 .................... JACKI NG I NST RUCTI O NS 5 ..................... SAF ET Y AND I NST[...]

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. Although haz ard contr ol and acc ident pr evention are part ially dependent upon t he design and configurat ion of t he ma[...]

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) . C. Aft er engine is star ted, release parking brak e and keep f o[...]

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 . 3. Never s tor e the m[...]

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 . Prio r t o rai sin g machi n e, remo ve an y att ach - me nts that[...]

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. Par t num bers f or dec als are lis ted in your Part Cat alog. Or der replacem[...]

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 ........... Decimal and Millimeter Equivalents 2 ............ U.S. to Metric 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. For critical applications, as determined by T oro, either the recommended torque or a torque that is unique to the application is clearly identified and spe- cified in this Service Manua[...]

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 SAE Grade 1 Bolts, Screws, Studs & Sems with Regular Height Nuts (SAE J995 Grade 2 or Stronger Nuts) SAE Grade 5 Bolts, Screws, Studs & Sems w[...]

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 8.8 Bolts, Screws and Studs with R e g u l a r H e i g h t N u t s Class 10.9 Bolts, Screws and Studs with R e g u l a r H e i g h t N u t s Thread Size Regular Height Nuts (Class[...]

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 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 [...]

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 ......................... SPECIFICA TIONS 2 ............................ ADJUSTMENTS 3 .........................[...]

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 3.09 in ( 78 mm x 78. 4 mm) T otal Dis plac ement 91.4 in 3 (1498 c c ) Com pression Rat io 23[...]

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. 1. Move t hrot t le cont rol lever on contr ol[...]

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. Hose clamp 10. Fuel t ank 1 1. Gro mmet 12. Fuel gauge 13. H ose clamp 14. Drai ncock 15. [...]

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. Always fill fue l tank o[...]

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. Flange nut (8 used) 13. C ap screw ( 2 used) 14. H ose clamp (2 u sed) 15. Flan ge head scr ew ( [...]

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. 2. Remove air cleaner c omponent s as needed using Figur es 4 as a guide. 3. See Operat or ’s M[...]

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. Flange head scr ew (2 u sed) 9. T ail pipe br acket 10. H ex nut ( 2 used) 1 1. Upper clamp 12[...]

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. CAUTION Th e mu ffl er an d exh au st p ip e may be h o t. T o av oid poss ible burns , allow the[...]

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. H ose clamp (4 u sed) 1 1. Foam seal (2 used ) 12. Flange nut (4 used[...]

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. CAUTION Do not ope n ra diator c ap or dr ain c oolant if the radi ato r o r eng i ne i [...]

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. Flange nut (4 used) 9. Flange nut (14 used) 10. Fan clu tch 1 1. Stud ( 4 used) 12.[...]

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. 2. Open and s upport hood. 3. Disconnect negativ e ( - - ) c able and then pos itiv e (+) cable f[...]

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 ). S upport dr ive shaf t away from en- gine. 10. Disconnec t wire harnes s connect ors [...]

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 . B. Connec t upper and lower radiat or hoses to the engine. S ecure wit h hose [...]

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 ....................... To w i n g M a c h i n e 3 ............................. H[...]

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) 1.03 in 3[...]

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. Check Hydraulic Fluid[...]

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. These conditions can cause hose damage and deterio- ration.[...]

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. 2. As a preventative measure against leakage, it is rec- ommended that the face seal O - [...]

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. 2. As a preventative measure a[...]

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. 2. As a preventative measure against leakage, it is rec- ommended that the O - - ring be replaced any time the connection is opene[...]

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. T o relieve hydraulic pressure in [...]

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 is included in Chapter 8 - - Foldout Drawings GEAR PUMP CROSSTRAX MANIFOLD LIFT CONTROL MANIFOLD BYP ASS PISTON (TRACTION) PUMP DECK CONTROL MANIFOLD V[...]

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 4300 - - D GEAR PUMP CROSSTRAX MANIFOLD LIFT CONTROL MANIFOLD BYP ASS PISTON (TRACTION) PUMP DECK CONTROL MANIFOLD VA LV E STEERING CONTROL VA LV E ST[...]

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. The traction pump input shaft is rotated by a drive shaft that is driven from the engine flywhe[...]

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 CONTROL MANIFOLD BYP ASS PISTON (TRACTION) PUMP DECK CONTROL MANIFOLD VA LV E STEERING CONTROL VA LV E STEERING CYLINDER[...]

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 . The deck control manifold contains two (2) independent control circuit[...]

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 con- trol manifold proportional relief valves (PRV1 and PRV2) are de- - energized causing circuit flow to bypass the deck motors and return to the reser[...]

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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 CROSSTRAX MANIFOLD LIFT CONTROL MANIFOLD BYP ASS PISTON (TRACTION) PUMP DECK CONTROL MANIFOLD VA LV E STEERING CONTROL VA LV E STEERING CYLINDER[...]

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. The gear pump takes its suction from the hydraulic reservoir . The lift control manifold includ[...]

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 CROSSTRAX MANIFOLD LIFT CONTROL MANIFOLD BYP ASS PISTON (TRACTION) PUMP DECK CONTROL MANIFOLD VA LV E STEERING CONTROL VA LV E STEERING CYLINDER[...]

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. The gear pump takes its suction from the hydraulic reservoir . The lift control manifold includ[...]

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 MOVEMENT STEERING CYLINDER STEERING VA LV E PISTON MOVEMENT STEERING VA LV E R10 R10 FROM PUMP (P3) FROM PUMP (P3) TO TRACTION CHARGE CIRCUIT TO TRACTION C[...]

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. The gear pump takes its suction from the hydraulic reservoir . Steering circuit pressure is limi[...]

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. A high pressure hose is provided[...]

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. LOAD V AL VE: A simulated working load is created in the circuit by turnin[...]

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. This kit provides for bi - - direc- tional filtration which prevents filtered debris from being allowed back into the circuit regard[...]

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). Measure eff iciency of [...]

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. A hydraulic system with an excessive increase in heat or noise has a potential for failure. Sho[...]

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. Piston (traction) pump check relief valve is not seating or is damaged (NOTE: Piston (traction) [...]

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). Wheel motors [...]

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. Lift cylinde[...]

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). Steering rel[...]

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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). Before Performing Hydraulic T ests [...]

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. 1. If a tract[...]

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 STEERING CONTROL V AL VE TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L VE AND CHARGE CIRCUIT FORW ARD (R3) RELIEF V AL VE TEST SHOWN TO MOW CONTR[...]

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. 7. Move throttle to full speed (3200 RPM) . 8. Sit on seat, and wi[...]

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 VE TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L VE AND CHARGE CIRCUIT TO MOW CONTROL (REAR CUTTING UNITS) (FRONT CUTTING UNITS) TO MOW CONTROL [...]

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 . Remove two (2) flange head screws that secure oil filter adapter to frame[...]

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) PUMP VA LV E FROM STEERING CONTROL V AL VE TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L VE AND CHARGE CIRCUIT TO MOW CONTROL (REAR CUTTING UNITS)[...]

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 . 4. Raise and support operator seat to allow acc[...]

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 TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L VE AND CHARGE CIRCUIT TO MOW CONTROL (REAR CUTTING UNITS) (FRONT CUTTING UNITS) TO MOW CONTROL RH FR[...]

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 . 5. Attach a heavy c hain to the rear of the mac[...]

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) PUMP VA LV E FROM STEERING CONTROL V AL VE TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L VE AND CHARGE CIRCUIT TO MOW CONTROL (REAR CUTTING UNITS) ([...]

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. 5. Raise and support machine so all wheels are of f the ground (see Jacking Instructions in Chapter 1 - - Safety)[...]

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 LV E FROM STEERING CONTROL V AL VE RELIEF V A L VE ( PRV1) TEST SHOWN FROM LIFT CONTROL MANIFOLD TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L VE [...]

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. See Relieving Hydraulic System Pressure in the Gen - eral Information section of [...]

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 (TRACTION) PUMP DECK CONTROL MANIFOLD VA LV E FROM STEERING CONTROL V AL VE FROM LIFT CONTROL MANIFOLD TO LIFT CONTROL MANIFOLD TO STEERING CONTROL V A L[...]

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. See Relieving Hydraulic System Pressure in the Gen - eral Information section of [...]

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. Disconnect case drain hose at [...]

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 . NOTE: The deck motors are connected in series. [...]

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 PUMP (P5) TO DECK CONTROL MANIFOLD (REAR CUTTING UNITS) (FRONT CUTTING UNITS) TO DECK CONTROL MANIFOLD FROM MOW CONTROL MANIFOLD The lift relief valv[...]

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. Check for any hydrau- lic leakage from test connections and correct [...]

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 VE INTERNAL CASE DRAIN PUMP (P5) TO DECK CONTROL MANIFOLD (REAR CUTTING UNITS) (FRONT CUTTING UNITS) TO DECK CONTROL MANIFOLD FROM MOW CONTROL MANIFO[...]

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. Remove hydraulic hose. Ac- cess to hydraulic hose at lift control manifold can be ob- taine[...]

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 VE INTERNAL CASE DRAIN PUMP (P5) TO DECK CONTROL MANIFOLD (REAR CUTTING UNITS) (FRONT CUTTING UNITS) TO DECK CONTROL MANIFOLD FROM MOW CONTROL MANIFO[...]

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. 4. Place a steel cap on the open lift cylinder [...]

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 STEERING VA LV E PRESSURE GAUGE MANIFOLD TO LIFT CONTROL TO TRACTION CHARGE CIRCUIT GEAR PUMP INTERNAL CASE DRAIN PUMP (P5) TO DECK CONTROL MANIFOLD (REAR C[...]

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. Procedure for Steering Relief V alve Pressure T est: 1. Make sure hydraulic oil is at normal operating tem- perature by operating the machine under load for appr[...]

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. This test will dete[...]

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. Make sure engine is off. Apply t he parking brake. 3. Read Precautions For Hydraulic T [...]

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. Remov[...]

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. Use paper or cardboard, not hands, to search for leaks. Hydraulic fluid escaping under pressure can have sufficient force to penetrate the skin and cause seri[...]

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. If a closed - - loop hydraulic system filtering[...]

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. This procedure reduces the chance of damaging the system or its component[...]

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. Clamp (2 used) 14. Flange nut 15. Flange head screw (2 used) 16. O - - ri[...]

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. Label hydraulic hos[...]

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. Flange nut (4 used) 10. Flange head screw (2 used) Figure 65 FRONT RIGHT 34 to 42 ft[...]

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. Remove guard. 3. Remove t[...]

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. Pump support bracket 9. Flange nut (2 used) 10. T raction cable bracket 1 1. Flange head[...]

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. Remove key from the ignition [...]

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. IMPORT ANT : Make sure to not damage mach[...]

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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. S crew (4 used) 12. Plug 13. O - - ring 14. Seal 15. T runnion cover 16. Neutral switch 17[...]

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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. Body (P1 section) 10. Flange (3 used) 1 1. S plined connecting shaft (3 used) 12. Dr[...]

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. 7. Remove the thrust plates and seals from each pump section. Before removin[...]

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. O - - ring 10. Hydraulic tube 11 . O - - r i n g 12. Lock nut (4 used per wheel moto[...]

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 . Removal (Fig. 74) 1. Park the machine on a leve[...]

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 . Use labels placed during the removal pro- cess to prope[...]

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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. Cap screw (4 used per motor) 10. Lock washer (4 used per motor) 1 1. Steering cylinder 12. [...]

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 . 1. Park the machine on a leve[...]

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. 10. Lower the machine to the ground. Failure to properly tighten wheel hub lock nut or wheel lug nuts could result in failure or loss of wheel a[...]

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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. Drive link 13. Thrust bearing 14. Coupling shaft 15. Thrust bearing 16. Thrust washer 17. Inner [...]

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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. O - - ring 1 1. Cap screw (3 used) 12. Lock washer (3 used) 13. Spacer (3 [...]

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. Locate and retrieve three (3) spacers from between bracket and manifold. 8. Re[...]

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. O - - ring 1 1. Seal kit 12. Bi - - Directional relief valve Figure 78 4 3 1 2 9 10 11 8 5 6 7 [...]

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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. Hydraulic tube 12. Hydraulic tube 13. Hydraulic tube Figure 79 FRONT RIGHT 2 3 6 [...]

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. Remove key from the ignition switch. 2. Read the General Precautions for Removing and Installing Hydraulic System Components at the begin- ning of the Service and Repairs sectio[...]

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. O - - ring 10. Relief valve (RV1/RV2) 1 1. P ilot piston Figure 81 2 3 6 8 9 1 5 7 4[...]

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. If zero leak plug re- moval is neces[...]

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. 90 o hydraulic fitting 1 1. Hydraulic hose 12. Hydraulic hose 13. 45 o hydraulic fitting 14. Hydra[...]

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). Remove hydraulic motor and O - - ring from deck. 7. Cover top of spindle to prevent debris from e[...]

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. Flange washer 4. Shaft seal 5. Front flange 6. Pressure seal 7. Backup gasket 8. Front wear plate[...]

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 . 7. Carefully remove body . Lift body straight up to re- move. Make sure the rear wear p[...]

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 . Lubricate all other[...]

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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. Hydraulic tube 1 1. Hydraulic tube 12. O - - ring 13. O - - ring 14. Diagnostic fitting 15[...]

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 . 5. Disconnect hydraulic hoses and lines from f[...]

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. Solenoid coil 5. Nut 6. Nut 7. Solenoid coil 8. Proportional relief valve (PRV) 9. Logic cartridge (LC) Figure 92 FRONT RIGHT (27 N - - m) 20 ft - - lb (33 N - - m) 25 ft - - lb 60 in - - l[...]

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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. Retaining ring 12. Thrust washer 13. Cylinder slide pin Figure 93 FRONT RIGHT 1 2 5 3 4 67 t[...]

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. Thoroughly clean hydraulic connections prior to loosening hydraulic lines from lift cy[...]

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. Lock nut 14. Barrel Figure 96 6 8 9 10 11 13 1 5 7 12 14 4 40 ft - - lb (54 N - - m) 2 3 6 8[...]

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 . 2. Mount[...]

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. Hydraulic tube 1 1. Hydraulic tube 12. Hydraulic tube 13. Column brace 14. Steering c[...]

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 . 7. Disconnect hydraulic lines from steering co[...]

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. Sleeve 12. Cross pin 13. Spring set 14. Ring 15. Thrust washer 16. Bearing 17. Shaft sea[...]

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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. Thrust washer 10. Jam nut 1 1. Grease fitting 12. Wheel motor (LH shown) 13. Wheel hub asse[...]

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. Remove the key from the ignition switch. 2. Read the General Precautions for Removing and Installing Hydraulic System Components at the begin- ning of the Servi[...]

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. Rear head seal 1 1. Front head seal 12. Wear ring 13. Dust seal 14. Barrel 15. Piston seal 16[...]

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. 3. Inspect head, shaft and piston for[...]

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. Hose clamp (4 used) 1 1. Foam seal (2 used) 12. Washer (4 used) 13. Cap scre[...]

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. Thoroughly clean hydraulic connections prior[...]

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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 ................... Electrical Drawings 3 .......................... SP[...]

Groundsmaster 4300 - - D Page 5 - - 2 Electrical System This page is intentionally blank.[...]

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. Re- fer to that publication for additional information when servicing the machine. T oro Elec[...]

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. Obtain this tool locally . NOTE: T oro recommends the use of a DIGIT AL V olt - - [...]

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 . T oro Part Number for Diagn[...]

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. For effective troubleshooting and repairs, there must be a good understanding of the ele[...]

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. T o r e- trieve these fault codes from the controll[...]

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.) and energizes outputs to actuate solenoids or relays for the requested[...]

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. 6. The Diagnostic Display will i[...]

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. NOTE: An open output (e.g. an unplu[...]

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. Example: T o start the engine with no operator in the seat, when the ignition key is[...]

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 . Battery cables are loose or corroded. Fuse F1 - - 1 (15 amp) or F1 - -[...]

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 . Nothing happens when start attempt is made. Control panel lights and[...]

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 . Main power relay or circuit wiring is faulty . Engine continues to r[...]

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 . Cutting decks run, but should not, when raised. Cutting decks shut off with PT O switch.[...]

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 . A hydraulic problem in rear mow circuit ex[...]

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). The ignition switch should be in the OFF position[...]

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. Check the operation of the interlock switches daily for proper operation. Re - pl[...]

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. 14). The sensing plate for the traction neutral switch is the trac[...]

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. 16). When the parking brake is not applied, the parking brake detent is positioned near the target end of the parking brake switch s[...]

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. 17). The sensing plate for the mow/transport switch is a tab on the mow[...]

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). NOTE: Electrical troubleshooting of any 12 volt power connectio[...]

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 . The light should stay lit for approximately six (6) seconds while the ignition switch is left in th[...]

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). 2. Make sure ignition switch is in the OFF positio[...]

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. The TEC controller monitors the position of the PTO switch (up or down). [...]

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. T esting 1. Remove inside control arm cover t o gain access to headlight switch (see Control Arm Disassembly in the Service and Repairs s[...]

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. The seat switch is located di-[...]

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. These switches a[...]

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. 31). The sensing plate for the traction neutral switch is the traction lever b[...]

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 . When the parking brake is not applied, the parking brake [...]

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. The sensing plate for the mow/ transport switch is the mow speed limiter . T[...]

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. The start relay is attached to a frame bracket under the hood next to the hydraulic pump drive shaft (Fig[...]

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. 36). Relays can be identified by a tag on the wire harne[...]

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. The controller is located be- hind the c ontrol arm access cover next [...]

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 . This fuse resides in a fuse holder near the battery (Fig. 41[...]

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. Refer to wire harness drawings in Chapter 8 - - Foldout Drawin[...]

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. 44 and 45). The remaining fusible link is included in the wire har[...]

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. 46) and the lift control manifold includes three (3) solenoid valves (Fig. 47). When th[...]

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. The changing resistance of the temperature sender sig- n[...]

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). When excessive coolant temperatur[...]

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 (0.56 kg/cm 2 ). The TEC controller monitors the o[...]

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. The solenoid and its circuit wirin[...]

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. DANGER Because diesel fuel is highly flammable, use cau - ti[...]

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. Battery Storage If the machine will be stored for more than 30 days: 1. Remove the battery from t[...]

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. CAUTION When working with batteries, use extreme cau- tion to avoid splashing or spilling[...]

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 . Draw electrolyte in and out of the hydrometer barrel prior to t[...]

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. CAUTION Follow the battery char[...]

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. Removal 1. Park machine on a level surface, lower cutting decks, stop engine and engage parking br[...]

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 ............................. SERVICE AND REP AIRS 4 ...................... Wheels 4 .......................[...]

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 12.0 - - 10, 4 ply , tubeless) Wheel Lug Nut T orque 70 to 90 ft - - lb (95 to 122 N - - m) General Information Operator ’s Ma[...]

Groundsmaster 4300 - - D Page 6 - - 3 Chassis This page is intentionally blank. Chassis[...]

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. Rear wheel hub 10. Rear wheel 1 1. Lock nut Figure 2 FRONT RIGHT 70 to 90 ft - - lb (95 to 1[...]

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. When changing attachments, tires or perform- ing other service, use correct sup[...]

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. Hydraulic tube 12. Hydraulic tube 13. Column brace 14. Steering control valve 15. Fl[...]

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. D. Locate and retrieve two (2) rubber bushings and spacers. 6. Slide rubber bellows up[...]

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. Hydraulic tube 11 . O - - r i n g 12. Lock nut (4 used per wheel motor) 13. Cap scre[...]

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. Hammering may cause damage to the wh[...]

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. Jam nut 1 1. Grease fitting 12. Spindle cap 13. Retaining ring 14. Flange head screw (3 use[...]

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. 3. Loosen, but do not remove, rear wheel lug nuts. 4. Jack up rear of machine and remove rear whe[...]

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. Jam nut 1 1. Grease fitting 12. Wheel motor (LH shown) 13. Wheel hub assembly 14. M[...]

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. 3. Remove both rear wheel assemblies (see W heel Re- moval in this section). Make sure t[...]

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. Make sure that roll pin on pivot pin is positioned in frame reliefs. 2. Install thrust washer (ite[...]

Groundsmaster 4300 - - D Page 6 - - 15 Chassis This page is intentionally blank. Chassis[...]

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. Cap screw 13. Latch 14. Swell latch (2 used) 15. Access cover 16. Washer head screw (10 used) 1[...]

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. 3. At front of control arm, remove screw (item 6) and lock nut (item 5) that sec[...]

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. Flange nut 13. Flat washer (4 used) 14. Flange head screw (3 used) 15. Socket head screw (4[...]

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). 3. Disconn[...]

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 . C a p 12. Suspension boot 13. Pivot block (2 used) 14. Damper 15. Lower shock bolt [...]

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. 18 and 19) 1. Park machine on a level surface, lower cutting decks, stop engine, engage parking[...]

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. Bumper (4 used) 1 1. Flat washer 12. Cap screw (1 used per lift arm) 13. Flat[...]

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. 2. Remove cutting deck from front lift arm to be re- moved (see Cutting Deck Carrier Frame Removal in the Service and Repairs section of Chapter 7 - - Cu[...]

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. P ivot shaft (1 used per lift arm) 12. Flange bushing (2 used per lift arm) 13. Rol[...]

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. Position bulkhead bracket with attached [...]

Groundsmaster 4300 - - D Page 6 - - 26 Chassis This page is intentionally blank.[...]

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 ......................... Factors That Can Affect Quality of Cut 4 ......... SPECIAL TOOLS 5 .[...]

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. The Groundsmaster 4300 - - D uses five (5) cutting decks. CONSTRUCTION: Deck chamber and frame are welded steel construction reinforced with channels and plate[...]

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. Always stop en- gine and remove key from ignition switch first. Operator ’s Manual The Cutting Deck Operator ’s Manual provides informa- tion regarding the operation, general maintenanc[...]

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. T urf conditions such as excessive thatch, “sponginess”, uneven ground conditions or attempting to cut off too much grass height may not always be over- [...]

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 . T oro Part Numbers: Inner Seal T ool 1 15 - - 0852 Bearing/Outer Seal T ool 1 15 - - 0853 Bearing Installation W asher 1[...]

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. Blade Stopping[...]

Groundsmaster 4300 - - D Cutting Decks Page 7 - - 7 This page is intentionally blank. Cutting Decks[...]

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. Hydraulic deck motor 3. Spindle plate 4. Cutting deck 5. O - - ring 6. Spind[...]

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. 4). Remove hydraulic motor and O - - ri[...]

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. The spind[...]

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. Make sure that the assembly is correct by supporting the fir[...]

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. Flange head screw 7. Skid bracket 8. Cap screw Figure 9 8 5 4 1 7 6 3 2 FRONT RIGHT 5 4 3 6 8 7 29 to 35 ft - - lb ( 4 0t o4 7N - - m ) 29 to 35 ft - - lb ( 4 0t o4 7N - - m ) 29 to 35 ft [...]

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. 10), remove fasteners securing left and right scraper rod brackets to roller mounts. Remo[...]

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. Remove second set of outer seals[...]

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. Position a second new bearing to roller sh[...]

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. 3. Remove front roller assembly and spacer from deck frame. 4. T o remove bearings a[...]

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. Cap screw (2 used per deck) 10. Bushing (2 used per frame) 1 1. P in (2 used per deck) 12. Lif[...]

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. T o remove cutting decks from the lift arm pivot[...]

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 ................................ WIRE HARNESS DRA WINGS 6 .................. Main Wire Harness [...]

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 E STEERI NG CYLINDER[...]

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 CONTROLLE R[...]

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/BL ACK RED RED/BL ACK GREEN RED/BL ACK BLACK GRA Y PINK BLACK BLUE/YELLOW BLACK YELLOW/GREEN BLACK BLACK BLACK BLACK BLACK GREEN VIOLET WHITE/GREEN GR[...]

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 BROWN/YELLOW PINK BLUE GRA Y BLACK BLACK GREEN BLACK/WHITE RED/WHI TE WHITE/BLACK WHITE/VIOLET BROWN RED/WHI TE BLACK/WHITE GRA Y RED/WHI TE BLACK/WHITE [...]

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[...]