Page 1 SHIBAURA TRACTOR & MOWER MODEL WORKSHOP MANUAL SX21/24 TRACTOR SXM54/60 MOWER...
Page 2 Introduction In order to refine the Shibaura tractor series furthermore, SX series tractors were developed this time. These are economical tractors provided with practical functions and high power. They meet users’ needs according to efficient and economical specifications requiring no after-care.
Page 3 CONTENTS 1. General Information･･････････････････････････････････････････････････････････････････････････････3 2. Specification & Structure･･････････････････････････････････････････････････････････････････････････6 3. Separating the tractor････････････････････････････････････････････････････････････････････････････28 4. Installation and trial run ･････････････････････････････････････････････････････････････････････････37 5. Engine systems ････････････････････････････････････････････････････････････････････････････････45 6. Front wheel drive･･･････････････････････････････････････････････････････････････････････････････93 7. Differential and rear axle････････････････････････････････････････････････････････････････････････103 8. Hydrosrstatic transmission ･･･････････････････････････････････････････････････････････････････････116 9. PTO････････････････････････････････････････････････････････････････････････････････････････143 10. Breaks･･･････････････････････････････････････････････････････････････････････････････････････168 11. Hydraulic systems･････････････････････････････････････････････････････････････････････････････175 12.
Page 4 CONTENTS 15. PRECAUTION BEFORE SERVICING･･･････････････････････････････････････････････････････････3 16. BASIC UNDERSTANDING ON SERVICE･･････････････････.･････････････････････････････････････3 17. METRIC BOLT TORQUE SPECIFICATIONS･････････････････････････････････････････････････････4...
Page 5 1. PRECAUTIONS BEFORE SERVICUING 1. Have the tractor washed clean and have the oil, fuel, and cooling water drained out depending on the work required. 2. Service shop should always be kept clean to prevent dust from rising and should be well lit. 3.
Page 6 METRIC BOLT TORQUE SPECIFICATIONS Coarse Thread Fine Thread Bolt Size Grade No. Kilo-gram Newton- Pitch (mm) Newton Meters Pitch (mm) Kilo-gram Meters Meters Meters 4T, 4.8 4.9-6.9 0.5-0.6 7T, 8T, 8.8 8.3-11.3 0.85-1.15 - - - - - - - - - - - - - - - 10T, 11T 11.7-15.7...
Page 7 1 - SPECIFICATION & STRUCTURE CONTENTS 1. SPECIFICATION ･････････････････････････････････････････････････････････････････････････････7 2. EXTERNAL VIEWS･･･････････････････････････････････････････････････････････････････････････9 3. ENGINE SECTIONAL VIEW･･･････････････････････････････････････････････････････････････････10 4. POWER FLOW･･････････････････････････････････････････････････････････････････････････････11 1) Four wheel drive power flow････････････････････････････････････････････････････････････････11 2) PTO power flow･･････････････････････････････････････････････････････････････････････････12 5. OIL FLOW･･････････････････････････････････････････････････････････････････････････････････14 1) Oil flow schematic････････････････････････････････････････････････････････････････････････14 2) Power steering･･･････････････････････････････････････････････････････････････････････････15 3) Hydraulic power lift system････････････････････････････････････････････････････････････････19 6.
Page 8 1 - SPECIFICATION & STRUCTURE 1. SPECIFICATION SX21 SX24 Model Length (Lower Link horizontal) 2,445 mm Top point a ROPS folded 1,557 mm (AG) Height Top ROPS 2,285 mm (AG) Width 1,180 mm (Turf), 1,175 mm (BAR), 1,085 mm (AG)
Page 9 1 - SPECIFICATION & STRUCTURE The ground speeds are engine speed at 3000 rpm. Range Hydrostatic transmission 0 – 8.1 (with turf 26×12.00 – 12 rear tires) Forward (km/h) 0 – 16.3 (with turf 26×12.00 – 12 rear tires) 0 – 5.4 (with turf 26×12.00 – 12 rear tires) Reverse (km/h) 0 –...
Page 10 1 - SPECIFICATION & STRUCTURE 2. External Views unit : mm Model SX 21/24 2445 2282 1180 1400 (TURF tyres) SX 21/24 2445 2288 1175 1400 (BAR tyres) SX 21/24 2445 2285 1085 1400 (AG tyres)
Page 11 1 - SPECIFICATION & STRUCTURE 3. ENGINE SECTIONAL VIEW...
Page 12 1 - SPECIFICATION & STRUCTURE . POWER FLOW 1) Four wheel drive 1. HST 5. Drive pinion 2. Range slide gear 6. Differential assembly 3. FWD take-off box 7. Final drive drop box 4. FWD drive shaft 8. Front wheel hub Manual FWD The FWD is a direct FWD system utilizing a sliding gear in the FWD take-off box attached to the rear transmission housing.
Page 13 1 - SPECIFICATION & STRUCTURE 2) PTO power flow (1) PTO clutch lever “ Disengaged” position (2) PTO clutch lever “Engaged” position and rear PTO “Engaged position”...
Page 14 1 - SPECIFICATION & STRUCTURE (3) PTO clutch lever “Engaged” position and mid PTO “Engaged” position (4) PTO clutch lever “Engaged” position and rear and Mid PTO “Engaged” position...
Page 15 1 - SPECIFICATION & STRUCTURE 5. OIL FLOW 1) Oil flow schematic ① Oil pump ② Power steering control valve ③ 3P valve ④ HST ⑤ Oil filter ⑥ Oil filter ⑦ Plug (For remote control valve) ⑧ Power steering cylinder ⑨...
Page 16 1 - SPECIFICATION & STRUCTURE 2) Power steering (1) Neutral position 1. Sleeve 5. Hydraulic Pump 2. Spool 6. Cylinder 3. Relief Valve 7. Check Valve Assy. 4. Reservoir 8. Gerotor Gear Pump POWER STEERING OPERATION Fluid Flow - Neutral Position Pressurized hydraulic fluid from the hydraulic pump, 5, Because the system is fully hydraulic, there is no road enters the valve body at port "P".
Page 17 1 - SPECIFICATION & STRUCTURE (2) Left turn 1. Sleeve 5. Hydraulic Pump 2. Spool 6. Cylinder 3. Relief Valve 7. Check Valve 4. Reservoir 8. Gerotor Gear Pump front Fluid Flow - Left Turn Turning the steering wheel to the left rotates the valve wheels to turn left.
Page 18 1 - SPECIFICATION & STRUCTURE (3) Right turn 1. Sleeve 5. Hydraulic Pump 2. Spool 6. Cylinder 3. Relief Valve 7. Check Valve Ass’y. 4. Reservoir 8. Gerotor Gear Pump causes the front wheels to turn right. Fluid Flow - Right Turn Turning the steering wheel to the right rotates the valve Fluid contained in the cylinder left side returns to the spool, 2, and indexes the grooves in the spool with...
Page 19 1 - SPECIFICATION & STRUCTURE (4) Emergency 1. Sleeve 6. Cylinder 2. Spool 7. Check Valve Ass’y 3. Relief Valve 8. Gerotor Gear Pump 4. Reservoir 5. Hydraulic Pump MANUAL OPERATION In the event of power steering pump failure or engine Fluid from the opposite side of the cylinder returns to shut down, the steering system can be operated the control valve.
Page 20 1 - SPECIFICATION & STRUCTURE 3) Hydraulic power lift system (1) Neutral position Neutral Position 1. Control Valve Spool 6. Hydraulic Pump 2. Flow Priority Valve 7. Relief Valve 3. Lift Check Valve 8. Hydraulic Cylinder 4. Check Valve 9. Sump 5.
Page 21 1 - SPECIFICATION & STRUCTURE (2) Lifting position Lifting Position 1. Control Valve Spool 6. Hydraulic Pump 2. Flow Priority Valve 7. Relief Valve 3. Lift Check Valve 8. Hydraulic Cylinder 4. Check Valve 9. Sump 5. Drop Rate Control Valve 10.
Page 22 1 - SPECIFICATION & STRUCTURE (3) Lowering position Lowering Position 1. Control Valve Spool 6. Hydraulic Pump 2. Flow Priority Valve 7. Relief Valve 3. Lift Check Valve 8. Hydraulic Cylinder 4. Check Valve 9. Sump 5. Drop Rate Control Valve 10.
Page 23 1 - SPECIFICATION & STRUCTURE 6. MOWER LIFT LINKAGE 1) Operation The mower deck, 1, is raised to its highest position when the hydraulic control lever, 2, is in the "raise" position. When the mower cutting height lever, 3, is in the "locked" position (lever fully rearward), the mower deck height is locked, and the HPL system can be freely used without affecting the mower deck.
Page 24 SPECIFICATION & STRUCTURE To establish a cutting height, move the cutting height control lever, 1, to the desired position. This slides the stop plate, 2, downward, which changes the travel limit on the deck height stop rod, 3. Note that, with the HPL control lever, 4, still in the "raise" position, the lift arm linkage holds the mower deck at its maximum height while the cutting height adjustment is made.
Page 25 SPECIFICATION & STRUCTURE When the hydraulic control lever, 1, is lowered, and the oil in the HPL cylinder returns to reservoir, the lift arm, 2, rotates to the 'lowered' position, and the mower deck, 3, descends until the stop rod, 4, bottoms against the stop plate, 5, in its preset position.
Page 26 SPECIFICATION & STRUCTURE 7. HST The hydrostatic unit, 1, consists of a variable displacement piston type pump, 2, fixed displacement piston type motor, 3, high pressure relief valve, 4, two feed valves and neutral valve assemblies, 5. The input shaft, 6, driven by the engine flywheel, is splined to the variable displacement, piston pump and extends out the rear side of the unit to drive the PTO shaft, 7.
Page 27 SPECIFICATION & STRUCTURE 8. Wiring...
Page 28 SPECIFICATION & STRUCTURE 20-1...
Page 29 2 - SEPARATING THE TRACTOR CONTENTS 1. ENGINE REMOVAL･･･････････････････････････････････････････････････････････････････････････29 2. Transmission removal･･･････････････････････････････････････････････････････････････････････････32 3. Front axle & the other removal････････････････････････････････････････････････････････････････････36...
Page 30: Engine Removal
2 - SEPARATING THE TRACTOR 1. ENGINE REMOVAL 1) Bonnet ① Open the bonnet and disconnect the connector for the headlights. ② Disconnect the negative battery cable from the battery. ③ Remove the bonnet from the tractor. 2) Side cover Remove the right and left side covers.
Page 31 2 - SEPARATING THE TRACTOR 5) Air cleaner assembly ➀ Untighten the hose band of the intake manifold. ➁ Remove the air cleaner assembly from the air cleaner support. 6) Radiator assembly ① Remove the reserve tank from the guard support. ②...
Page 32 2 - SEPARATING THE TRACTOR 9) Steering column, Bonnet support, Firewall box ① Remove the steering column, firewall box as a set. 10) Rubber mat, Step (Center, R.H., L.H.), HST fan cover ① Remove the HST pedals. ② Remove the rubber mat, HST fan cover. ③...
Page 33: Transmission Removal
2 - SEPARATING THE TRACTOR 13) Wirings Disconnect the wirings from starting motor, ① alternator, cooling water temperature sensor, oil pressure switch, glow plug and engine stop solenoid, and move the harness out of the way. 14) Engine Removal ① Disconnect the fuel pipe and return pipe from the engine.
Page 34 2 - SEPARATING THE TRACTOR 3) Seat ① Remove the bolts for attached seat assembly. ② Remove the seat assembly. 4) Fender ① Remove the grips from 4WD control lever, PTO clutch lever, hydraulic power control lever, range control lever, PTO select lever and mower height adjustment lever.
Page 35 2 - SEPARATING THE TRACTOR 7) Transmission assembly The hydraulic cylinder assembly, HST assembly and rear wheel shaft assembly can be removed from the transmission housing before remove the transmission assembly from the main frame. ① Remove the brake rods from the brake levers. ②...
Page 36 2 - SEPARATING THE TRACTOR ⑦ Disconnect the oil pipes from the HST unit and hydraulic control valve. ⑧ Remove the split pin, washer and disconnect the HST control rod from the HST shift arm. ⑨ Remove the clamp from under the main frame. ⑩...
Page 37 2 - SEPARATING THE TRACTOR 3. FRONT AXLE OTHER REMOVAL 1) Front axle assembly ① Disconnect the power steering oil pipes at the adapters. ② Remove the nuts, adapters and hose clamp from the main frame. ③ Remove the bolt and joint assembly between the front wheel drive shaft and front axle drive pinion.
Page 38: Table Of Contents
3 - INSTALLATION AND TRAIAL RUN CONTENTS 1. INSTALLATION････････････････････････････････････････････････････････････････････････････38 1) High pressure oil pipe･････････････････････････････････････････････････････････････････････38 2) O-ring for HST･･････････････････････････････････････････････････････････････････････････39 3) Front axle assembly･･････････････････････････････････････････････････････････････････････39 4) Coupling and joint assembly･･･････････････････････････････････････････････････････････････39 5) Front wheel drive shaft and joint assembly････････････････････････････････････････････････････40 6) ROPS frame････････････････････････････････････････････････････････････････････････････40 7) Foot brake and hand brake adjustment････････････････････････････････････････････････････････40 8) Brake switch････････････････････････････････････････････････････････････････････････････41 9) HST neutral position adjustment････････････････････････････････････････････････････････････42 10) Mower lift linkage･･･････････････････････････････････････････････････････････････････････43...
Page 39: Installation････････････････････････････････････････････････････････････････････････････38
● Liquid gasket and thread sealant (Loctite Safety Solvent) NOTE: ① We recommend the liquid gasket sealer is SHIBAURA Part Code No. 095109062 or Three Bond No. 1104. ② Use care to not permit excess sealer to enter the inside of the housings or shift rod bores.
Page 40: O-Ring For Hst･･････････････････････････････････････････････････････････････････････････39
3 - INSTALLATION AND TRAIAL RUN 2) O-ring for HST Install the O-ring, ①, and collar, ②, between HST unit, ③, and transmission housing. 3) Front axle assembly ① Fill the grease in the bearing holder and place the bearing holder on the front axle assembly. ②...
Page 41: Front Wheel Drive Shaft And Joint Assembly････････････････････････････････････････････････････40
3 - INSTALLATION AND TRAIAL RUN 5) Front wheel drive shaft, Joint assembly NOTE: Apply the grease containing disulfide molybdenum onto drive shaft’s and joint assembly’s splines. ① Install the drive shaft, coupling and bearing unit onto the main frame and drive in the spring pin to the coupling.
Page 42: Brake Switch････････････････････････････････････････････････････････････････････････････41
3 - INSTALLATION AND TRAIAL RUN (2) Parking Hand brake adjustment Free play of foot brakes is adjusted to 25-30 mm at first, and adjusts the parking brake next as follows: ① Jack up the both rear wheels off of the ground. ②...
Page 43: Hst Neutral Position Adjustment････････････････････････････････････････････････････････････42
3 - INSTALLATION AND TRAIAL RUN 9) HST neutral position adjustment ① Jack up the front and rear wheels off the ground and jack stands under the main frame. Make sure all four wheels are clear of the ground. ② Start the engine and set the low engine speed. ③...
Page 44: Mower Lift Linkage･･･････････････････････････････････････････････････････････････････････43
3 - INSTALLATION AND TRAIAL RUN 10) Mower lift linkage adjustment ① Loosen the lock nut, 1, on the mower lift rod. ② Start the engine and move the hydraulic control lever to the “raise” position. ③ Stop the engine. ④...
Page 45: Pto Clutch Safety Switch･･････････････････････････････････････････････････････････････････44
3 - INSTALLATION AND TRAIAL RUN 11) PTO clutch safety switch The switch is located in front of the PTO clutch lever pivot under the right fender. When the PTO clutch lever is in the “OFF” position the switch is closed. When the PTO clutch change lever is “ON”...
Page 46 4 - ENGINE SYSTEMS CONTENTS 1. ENGINE SPECIFICATION･･････････････････････････････････････････････････････････････････････48 2. REMOVAL･･･････････････････････････････････････････････････････････････････････････････････49 3. DISASSEMBLY AND INSPECTION･･････････････････････････････････････････････････････････････53 1) Rocker arm ass’y･･････････････････････････････････････････････････････････････････････････53 2) Cylinder head ass’y････････････････････････････････････････････････････････････････････････54 3) Cylinder block････････････････････････････････････････････････････････････････････････････57 4) Piston and Piston ring･･････････････････････････････････････････････････････････････････････58 5) Connecting rod････････････････････････････････････････････････････････････････････････････60 6) Connecting rod metal･･･････････････････････････････････････････････････････････････････････61 7) Bearing holder････････････････････････････････････････････････････････････････････････････62 8) Crank shaft bearing (bush)･･････････････････････････････････････････････････････････････････63 9) Crank shaft･･･････････････････････････････････････････････････････････････････････････････64 10) Flyweel and ring gear･･･････････････････････････････････････････････････････････････････････65...
Page 47 28) Nozzle and holder ass’y･･････････････････････････････････････････････････････････････････････83 29) Return pipe COMPL･Injection pipe････････････････････････････････････････････････････････････83 30) Alternator ass’y････････････････････････････････････････････････････････････････････････････83 31) Drive gear and hydraulic oil pump･････････････････････････････････････････････････････････････84 32) V-velt;Fan pulley・Cooling fan････････････････････････････････････････････････････････････････84 33) Exhaust manifold and Muffler assembly･････････････････････････････････････････････････････････84 5. ENGINE MAINTENANCE STANDARD TABLE･････････････････････････････････････････････････････85 1. S753 ENGINE (SX21)･････････････････････････････････････････････････････････････････････････85 2. S773 ENGINE (SX24) ････････････････････････････････････････････････････････････････････････89...
Page 48 ENGINE SYSTEMS Tractor Model Engine Model SX21 S753 SX24 S773...
Page 49: Engine Specifications
ENGINE SYSTEMS 1. Engine Specifications Model SX21 SX24 Specifications S753 S773 Type 4-cycle diesel engine Cylinder arrangement Vertical in-line Combustion chamber type Swiel-chamber type No. of cylinders 75 mm × 72 mm 77 mm × 72 mm Bore x stroke...
Page 50 ENGINE SYSTEMS 2. REMOVAL Disassembly Order Parts Name Muffler・Gasket Exhaust manifold・Gasket Alternator Starting motor Oil filter Relief valve Oil level gauge · Gauge guide Engine stop solenoid · Seal washer Injection pipe Injection pump NOTE: 1. Remove the injection pipes and engine stop solenoid before remove the injection pump. 2.
Page 51 ENGINE SYSTEMS Order Parts Name Return pipe Injection nozzle · gasket Oil pipe · Eye bolt · Seal washer Glow plug · Connector Thermo-sensor Oil pressure switch Head cover･Gasket Rocker arm assembly･Gasket Push rod Cylinder head · Head gasket NOTE: 1.
Page 52: Idle Gear, Oil Pump Ass
ENGINE SYSTEMS Order Parts Name Fan holder · Fan pulley · V-belt · Cooling fan Water pump assembly· Gasket Hydraulic oil pump· Cover Crankshaft pulley Timing gear case assembly NOTE: Remove the engine stop solenoid and injection pump assembly at first. Idle gear ·...
Page 53 ENGINE SYSTEMS Order Parts Name Oil pan · Gasket · Suction filter · Suction pipe Fly wheel Rear plate Oil seal Piston and connecting rod assembly NOTE: 1. Before extracting piston, remove the carbon deposit from the TDC in the cylinder. 2.
Page 54 ENGINE SYSTEMS 3. DISASSEMBLY AND INSPECTION OF ENGINE MAIN PARTS ★Cautions before start Check the cylinder block and cylinder head for wear, leakage and damage. Remove deposit in oil holes of each part with air and check for clogging. Wash each part well to remove dust, contaminated oil, carbon, and other foreign matter. Remove carbon deposite on the piston, cylinder head, valves, etc.
Page 55 ENGINE SYSTEMS Cylinder head ass’y Disassembly (1) Using a valve spring replacer, compress the valve spring to remove the valve cotter, retainer, spring and valve. (2) Remove the valve guide seal. 1. Valve guide seal 4. Valve 2. Spring 5. Valve cotter 3.
Page 56 ENGINE SYSTEMS ➃ Replace the valve if the clearance between the stem and guide exceeds the service limit. Clearance between valve stem and valve guide (mm) Intake valve Exhaust valve Standard Standard Service assembling Service limit assembling limit value value More than 0.045 –...
Page 57 ENGINE SYSTEMS ➃ Coat the valve seat surface with compound and lap the contact surface turning the valve. ➄ Check that the valve contact surface is within the standard value and the contact position is even. ➅ When the cylinder head is replaced with new one, adjust the seat contact width and seat recess to the specified values with a seat cutter before lapping.
Page 58 ENGINE SYSTEMS 3) Cylinder block Inspection and service (1) Check for crack, damage and distortion on the top of the block in the same way as in the cylinder head. (2) Measurement of cylinder bore ➀ There should be no scratch, rust, corrosion, etc. on the cylinder bore when checked visually.
Page 59 ENGINE SYSTEMS 4) Piston and piston ring Disassembly (1) Remove the piston ring using a piston ring tool. (2) Remove the snap ring and extract the piston pin. Piston ring Piston pin Inspection (1) Piston Clearance between cylinder and piston (mm) ➀...
Page 60 ENGINE SYSTEMS (2) Piston ring ➀ Replace worn out or damaged piston ring, if any. ➁ Insert a ring at a right angle to the least worn out skirt of a cylinder, measure the clearance of ring end gap with a thickness gauge and replace if the end gap exceeds the service limit.
Page 61 ENGINE SYSTEMS Connecting rod Inspection (1) Check for torsion, parallelism and damage. Torsion and parallelism of connecting rod (mm) Measure the torsion and parallelism using a Standard Repair value connecting rod aligner and correct or replace if the assembling value repair value is exceeded.
Page 62 Reassembly (piston and connecting rod) (1) Heat the piston to about 100°C with a piston heater or the like and install it aligning the SHIBAURA mark in the piston and match mark at (A) of the connecting rod.
Page 63 ENGINE SYSTEMS 7) Bearing holder Disassembly and inspection Center bearing Model S753· S773 (1) Remove the bearing holder, and replace the metal if peeling, melting, uneven wear, or improper contact is Crankshaft center noticed. journal finishing Metal size Metal code No. (2) Measure the oil clearance of the crankshaft center dimension (ø) journal and metal using a plasti-gauge.
Page 64 ENGINE SYSTEMS 8) Crankshaft bearing (bush) Inspection (1) Check the bearing (bush) and replace if peeling, melting, uneven wear, improper contact, or other damage is notice. (2) Measure the oil clearance of the bearing (bush) and crankshaft journal using a cylinder gauge and micrometer.
Page 65 ENGINE SYSTEMS Crankshaft Inspection (1) To measure run-out of the crankshaft, support the crankshaft using a V block as shown in the right Crankshaft run-out (mm) figure, apply a dial gauge to the crankshaft center Standard assembling value Service limit journal, read the indication on the dial gauge rotating the shaft one turn gently.
Page 66: Timing Gear Case･･･････････････････････････････････････････････････････････････････････････78
ENGINE SYSTEMS 10) Flywheel and ring gear Inspection Check the ring gear and replace if damage or remarkable wear is noticed. When the wear is limited to a small area, remove the, ring gear, turn it about 90 degrees and shrinkage-fit to reuse it.
Page 67 ENGINE SYSTEMS 13) Oil flow U : Safety valve V : Suction filter W : Oil pump X : Relief valve Y : Oil filter Z : Oil pressure switch...
Page 68 ENGINE SYSTEMS 14) Oil pump Disassembly Removal from engine (1) Remove the snap ring. (2) Take out the colar, spring and shim. (3) Take out the idle gear, vane, and oil pump cover together. (4) Extract the rotor and thrust washer. (5) Extract the oil pump cover from the idle gear.
Page 69 ENGINE SYSTEMS 16) Water pump assembly NOTE: The water pump main body is aluminum die cast and should be replaced as ass’y if subjected to water leakage or other troubles. 17) Thermostat Disassembly (1) Remove the thermostat cover and takeout the thermostat from housing.
Page 70 ENGINE SYSTEMS 17) Radiator Specifications and structure Structure Specifications (1) The radiator is provided with the plate fin having Fin type Corrugated superior anti-vibration characteristics. (2) The radiator cap is of the pressure type (sealing type) Cooling water volume 3.5 ℓ for higher cooling efficiency.
Page 71: Injection Pump Assembly･････････････････････････････････････････････････････････････････････79
ENGINE SYSTEMS 18) Fuel filter Fuel passage The fuel flows as shown in the figure from the tank, pressurized by the injection pump to high pressure, and fed to the nozzle and injected to the combustion chamber. The fuel after lubricating the nozzle needle is returned to the tank through the overflow pipe. 1.
Page 72 ENGINE SYSTEMS Inspection If water, dust, or other foreign matter is observed in the transparent plastic case, clean and replace the filter if necessary. Disassembly and reassembly (1) Remove the filter turning the filter ring nut counterclockwise. NOTE: Take care to the O-ring fitted between the ring nut and main body, coat with grease before tightening. (2) Coat the area of the element to be mounted to the main body with grease and install the element by hand.
Page 73 ENGINE SYSTEMS 21) Injection pump Specification Engine Model Part Code No. Manufacturer and Injection Pump Type S753 131017710 094500 – 7410 S773 Disassembly, Inspection and Reassembly (1) Disassembly, inspection, and reassembly of injection pump. If the trouble has been verified to be in the injection pump, do not disassemble other than at shop specializing in this operation.
Page 74 ENGINE SYSTEMS Disassembly and inspection (1) Place the nozzle holder (body) in a vice and disassemble turning the nozzle nut. NOTE: Take care not to allow the needle valve to drop when removing the nozzle. (2) Wash the nozzle and needle valve and check for seizure and sticking of the nozzle and fuel leakage on the seat surface.
Page 75 ENGINE SYSTEMS 20) Air Cleaner Structure and functions (1) The air cleaner is connected to the cylinder with the air cleaner hose. (2) The air cleaner is of the cyclone type incorporating filter element and removes dust from the intake air. Inspection and replacement (1) Take out the element every 100 –...
Page 76 ENGINE SYSTEMS 4. REASSEMBLY Cautions before assembly ★ Wash parts to be installed. (Especially wash oil passage bearing, piston and cylinder bore carefully.) 2. Coat the sliding and rotating parts of the cylinder bore, piston, bearing and other parts with new oil before installing.
Page 77 ENGINE SYSTEMS 3) Oil seal 4) Rear plate NOTE: Apply the liquid gasket to around the M 10 screw holes for rear plate. Rear plate tightening torque: 46 ~ 54 N·m (4.7 ~ 55 kgf·m) 5) Fly wheel Align the hole to the roll pin on the crankshaft. Fly wheel tightening torque 69 –...
Page 78 ENGINE SYSTEMS 8) Oil pan Start tightening the bolts of the oil pan from the center, then tighten the opposing bolt on opposite side on the diagonal and specified torque. Oil pan tightening torque 10 – 12.7 N·m (1.0 – 1.3 kgf·m) 9) Oil level gauge and Gauge guide Install the oil level gauge and gauge guide using 2 O-rings.
Page 79 ENGINE SYSTEMS NOTE: 1. Coat the rotor and vane both sides with grease before installing them. 2. Never turn the crankshaft until the timing gear case is installed. 3. Turn pump cover clockwise counterclockwise, fix the hole at the center of the spring pin inserting hole moving distance, and then install the gear case.
Page 80: Injection Timing Adjustment･･･････････････････････････････････････････････････････････････････79
ENGINE SYSTEMS 15) Injection pump assembly ➀ Fit the shim which has been removed at the time of disassembly, connect the control rack of the injection pump and link, and fix with the snap pin. ➁ Tighten the injection pump with bolts and nut. Injection pump tightening torque 5 ~ 7 N·m (0.5 ~ 0.7 kgf·m) 16) Injection timing adjustment...
Page 81: Oil Filter･･････････････････････････････････････････････････････････････････････････････････80
ENGINE SYSTEMS Engine Model S753 and S773 Injection timing adjusting shim Piston displacement to crankshaft angle Thickness (mm) Part code (before TDC) 131437310 (°) Displacement (°) Displacement 131437320 2.850 4.411 131437330 3.137 4.761 131437340 3.436 5.132 *0.5 *131437630 (* without beading) 3.749 5.496 4.074...
Page 82: Cylinder Head･････････････････････････････････････････････････････････････････････････････81
ENGINE SYSTEMS 20) Cylinder head ➀ Position each of the pistons at top dead center and, using a dial indicator, determine the distance each piston projection above the face of the block. NOTE: Measure each of the pistons while holding a slight down pressure on the piston.
Page 83: Oil Pipe･･････････････････････････････････････････････････････････････････････････････････82
ENGINE SYSTEMS 21) Oil pipe Eye bolt tightening torque 10 ~ 13 N·m (1.0 ~ 1.3 kgf·m) 22) Push rod and Rocker arm ass’y Install the push rod and rocker arm ass’y Rocker arm ass’y tightening torque 20 ~ 25 N·m (2.0 ~ 2.5 kgf·m) 23) Valve clearance adjustment Untighten the nut of the intake and exhaust valves and adjust to 0.2 mm with adjust screw.
Page 84: Water Pump Ass'y･Radiator Hose･･････････････････････････････････････････････････････････････83
ENGINE SYSTEMS 25) Water pump ass’y · Radiator hose Water pump ass’y Bypass hose Radiator hose (lower) 26) Glow plug · Connector Model Glow plug tightening torque S753·S773 15 – 20 N·m (1.5 – 2.0 kgf·m) 27) Oil pressure switch Oil pressure switch tightening torque 15 ~ 20 N·m (1.5 ~ 2.0 kgf·m) 28) Nozzle and holder ass’y...
Page 85: Exhaust Manifold And Muffler Assembly･････････････････････････････････････････････････････････84
ENGINE SYSTEMS 31) Drive gear assembly and Hydraulic oil ➀ Install the drive gear assembly to the hydraulic pump and then install them with plate to the gear case. 32) V belt · Fan pulley · Cooling fan ➀ Install the fan pulley and cooling fan and then V belt.
Page 86 ENGINE SYSTEMS 5. Engine Maintenance Standards Table 1. S753 ENGINE (SX21) Unit for values without unit in the column of inspection item is mm. Standard To be Allowable Unit Part Inspection Items Standard Value Remarks Dimension Repaired Limit Compression pressure of cylinder More than 2.94...
Page 87 ENGINE SYSTEMS Standard Allowable Unit Part Inspection Items Standard Value To be Repaired Remarks Dimension Limit Twist between small and large end holes (per 100 Less than 0.08 More than 0.2 Straightness at 100 mm between small and large Less than 0.05 More than 0.15 end hole Front-to-rear clearance between connecting rod...
Page 88 ENGINE SYSTEMS Standard Allowable Unit Part Inspection Items Standard Value To be Repaired Remarks Dimension Limit When Valve clearance (Intake/exhaust) cooling temperature At 30.4 mm Spring strength (kgf) Less than 7 compressed length Free height 33.5 Valve spring Less than 1.2 Open-Before T.D.C 13°...
Page 89 ENGINE SYSTEMS Standard Allowable Unit Part Inspection Items Standard Value To be Repaired Remarks Dimension Limit Type 093500 – 3320 DENSO 11.76 11.27 – 12.25 Injection pressure MPa (kgf/cm (120) (115 – 125) Angle of injection direction 4° Cooling method Water colded, forced circulation Coolant capacity (ℓ)
Page 90 ENGINE SYSTEMS 2. S773 ENGINE (SX24) * Unit for values without unit in the column of inspection item is mm. Standard To be Allowable Unit Part Inspection Items Standard Value Remarks Dimension Repaired Limit Compression pressure of cylinder More than 2.94 Less than 2.45 Engine 200 MPa (kgf/cm...
Page 91 ENGINE SYSTEMS Standard Allowable Unit Part Inspection Items Standard Value To be Repaired Remarks Dimension Limit Twist between small and large end holes (per 100 Less than 0.08 More than 0.2 Straightness at 100 mm between small and large Less than 0.05 More than 0.15 end hole Front-to-rear clearance between connecting rod...
Page 92 ENGINE SYSTEMS Standard To be Allowable Unit Part Inspection Items Standard Value Remarks Dimension Repaired Limit When Valve clearance (Intake/exhaust) cooling temperature At 30.4 mm Spring strength (kgf) Less than 7 compressed length Free height 33.5 Valve spring Less than 1.2 Open-Before T.D.C 13°...
Page 93 ENGINE SYSTEMS Standard Allowable Unit Part Inspection Items Standard Value To be Repaired Remarks Dimension Limit Type 093500 – 3320 DENSO 11.76 11.27 – 12.25 Injection pressure MPa (kgf/cm (120) (115 – 125) Angle of injection direction 4° Cooling method Water colded, forced circulation Coolant capacity (ℓ)
Page 94 5 - Front wheel drive 1. FRONT AXLE REMOVAL ･････････････････････････････････････････････････････････････････94 2. FRONT AXLE DISASSEMBLY ･･････････････････････････････････････････････････････････････95 1) Final drive case cover ･･････････････････････････････････････････････････････････････････95 2) Steering cylinder ･･････････････････････････････････････････････････････････････････････95 3) Final drive case ･･･････････････････････････････････････････････････････････････････････95 4) Idler case ･･･････････････････････････････････････････････････････････････････････････96 5) Idler case disassembly ･････････････････････････････････････････････････････････････････96 6) Differential assembly ･･･････････････････････････････････････････････････････････････････96 7) Drive pinion ･････････････････････････････････････････････････････････････････････････97 3.
Page 95 5 - Front wheel drive 1. FRONT AXLE REMOVAL NOTE : Check axle end play before removal from the tractor. 1. Set the park brake on the tractor for safety. 2. Lift the tractor hood, and disconnect the negative (-) battery cable, 1, from the battery. 3.
Page 96 5 - Front wheel drive 11. Remove the bolt, 1, from the drive shaft and take out the drive shaft, 4. 12. Remove the front wheels from the axle. 13. With the jack firmly in place under the axle, loosen and remove the front, 2, and rear, 3, axle mounts.
Page 97 5 - Front wheel drive 4) Idler Case Remove the three bolts that attach the idler case, 1, to the axle. Carefully remove the idler case from the end of the axle, make note of shims, 2, removed from the differential side of the axle.
Page 98 5 - Front wheel drive 7) Drive Pinion 1. Remove the oil seal, 1, and discard. 2. Remove the snap ring, 2, and collar, 3, from the pinion shaft. 3. Remove the snap ring, 4, spacer, 5, and shims, 6. NOTE: Observe the quantity and size of the shims, 6, located between the spacer, 5, and bearing, 9, for assembly.
Page 99 5 - Front wheel drive 4. REASSEMBLY Assembly of front axle unit generally follows the disassembly procedure in reverse and refer to as follows: NOTE: Replace all seals and O-rings that have been removed in the disassembly procedure. 1) Drive Pinion Installation 1.
Page 100 5 - Front wheel drive 5. FWD BOX NOTE: Transmission assembly must be removed from tractor frame before FWD box can be removed. 1) Removal Remove the six retaining bolts, 1, from the FWD take-off box, 2. Remove the take-off box from the housing. 2) Disassembly Remove the oil seal, 1, and snap ring, 2, from the front of the take-off box...
Page 101 5 - Front wheel drive 3) Inspection Wash all components in a suitable cleaning solvent and allow to air dry. Inspect all bearings for excess wear, score marks, discoloration from overheating, or other damage. Lubricate all bearings with a clean lubricant before installation.
Page 102 5 - Front wheel drive 11. Install the drive shaft assembly, 7, into the FWD box while positioning the shift fork, 3, into the groove on the sliding gear, 8. 12. Install the snap ring, 14, into the take-off box. 13.
Page 103 5 - Front wheel drive 6. SPECIFICATIONS Front Wheel Drive Differential Clearance between differential pinion gear and pinion shaft 0.1 – 0.2 mm Wear limit 0.5 mm Thickness of differential thrust washer 1.1 - 1.2 mm Wear limit 0.9mm Different pinion shaft end play 0 –...
Page 104 7 - DIFFERENTIAL AND REAR AXLES CONTENTS 1. DIFFERENTIAL OVERHAUL･･････････････････････････････････････････････････････････････････104 1) Removal････････････････････････････････････････････････････････････････････････････････104 2) Drive pinion removal･･････････････････････････････････････････････････････････････････････104 2. DIFFERENTIAL･････････････････････････････････････････････････････････････････････････････1108 1) Disassembly･････････････････････････････････････････････････････････････････････････････108 2) Inspection･･･････････････････････････････････････････････････････････････････････････････109 3) Differential assembly･･････････････････････････････････････････････････････････････････････109 3. REAR AXLE OVERHAUL･････････････････････････････････････････････････････････････････････114 1) Disassembly･････････････････････････････････････････････････････････････････････････････114 2) Inspection･･･････････････････････････････････････････････････････････････････････････････114 3) Assembly･･･････････････････････････････････････････････････････････････････････････････115...
Page 105 7 - DIFFERENTIAL AND REAR AXLES 1. DIFFERENTIAL OVERHAUL 1) Removal NOTE: The differential gear assembly can be removed without removing the center housing from the tractor. To do so, remove both of the rear axle housings and the hydraulic top cover, also all related components. Before disassembly, drain the fuel from the fuel tank and the oil from the lift cylinder.
Page 106 7 - DIFFERENTIAL AND REAR AXLES Remove the mower deck lift rod, 1, from the left lift arm. Disconnect the brake control rod, 2, from the brake lever, 3, on the axle housing. Remove the eight retaining bolts, 1, securing the lift cover, 2, to the center housing.
Page 107 7 - DIFFERENTIAL AND REAR AXLES 11. Remove the differential return spring, 1. Drive out the internal roll pin, 2, from the differential lock shaft, 3, and remove the shaft from the housing. Use caution to retain the spring, 4, and remove the differential fork, 5, from the housing.
Page 108 7 - DIFFERENTIAL AND REAR AXLES 2) Drive Pinion Removal To remove the differential drive pinion, the transmission must be removed from the tractor and separated from the hydrostatic Transmission (HST). Refer to SECTION 05, Hydrostatic Transmission for complete disassembly procedures. Remove rear axle differential assembly, as described earlier in this chapter.
Page 109 7 - DIFFERENTIAL AND REAR AXLES 2. DIFFERENTIAL 1) Disassembly 1. Shim, 0.1 11. Pinion Gear 2. Shim, 0.2 12. Side Gear, RH 3. Bearing 13. Side Gear, LH 4. Bolt 14. Joint 5. Differential Cover 15. Ring Gear 6. Thrust Washer 16.
Page 110 7 - DIFFERENTIAL AND REAR AXLES 2) Inspection Inspect the pinion gear teeth for excessive wear or damage. Measure the thickness of the pinion gear thrust washers. Original thickness of the thrust washers is 1.1-1.2 mm. Replace if the thickness is less than 0.9 Measure the thickness of the side gear thrust washers.
Page 111 7 - DIFFERENTIAL AND REAR AXLES NOTE: Aft thrust washers must be installed in the same manner in which they were removed, dimpled side toward gear. 1. Assemble the four pinion gears, 1, with thrust washers, 2, the two side gears, 3, 4, and thrust washers, 5.
Page 112 7 - DIFFERENTIAL AND REAR AXLES 4. Place the shims, 5, (if equipped) and two bearing, 4, into the housing. 5. Insert the pinion shaft, 3, into the housing. Place 32 tooth fixing gear, 2, and lock nut, 1, on front end of pinion shaft.
Page 113 7 - DIFFERENTIAL AND REAR AXLES 10. Install roller bearings (not shown) gear assembly, 3, retaining ring, 1, and thrust washer(s), 2, on the pinion shaft. Place thrust washers on shaft, with the notched side towards the gears. NOTE: If installing original component, use the same quantity and thickness of shims, as removed during disassembly.
Page 114 7 - DIFFERENTIAL AND REAR AXLES 13. See “Differential Overhaul” for the remainder of the differential installation.
Page 115 7 - DIFFERENTIAL AND REAR AXLES 3. REAR AXLE OVERHAUL 1) Disassembly 1. To remove the rear axle housing. 2. Remove the stators, 1, brake discs, 2, and the anchor pin, 3, from the axle housing. 3. Remove springs, 4, from the actuator plate, 5. Use caution removing actuator plate, to retain four steel balls, 6, from the axle housing.
Page 116 7 - DIFFERENTIAL AND REAR AXLES 3) Assembly 1. Insert axle support bearings, 2 and 3, into axle housing. IMPORTANT : When installing new bearings or seals, it is important to use only special tools, for that exact application, as described in the beginning of the section. Do not use a hammer and punch, this could damage the seal 2.
Page 117 8 - HYDROSTATIC TRANSMISSION CONTENTS 1. HST OIL FLOW CHART･･･････････････････････････････････････････････････････････････････････117 2. TRUBLE SHOOTING･････････････････････････････････････････････････････････････････････････118 3. HST UNIT･･･････････････････････････････････････････････････････････････････････････････････120 1) Disassembly･････････････････････････････････････････････････････････････････････････････120 2) Inspection･･･････････････････････････････････････････････････････････････････････････････122 3) Assembly･･･････････････････････････････････････････････････････････････････････････････123 4) Installation･･････････････････････････････････････････････････････････････････････････････125 4. HST ADJUSTMENT･･････････････････････････････････････････････････････････････････････････126 1) Neutral Adjustment･･･････････････････････････････････････････････････････････････････････126 2) Pedal adjustment･･････････････････････････････････････････････････････････････････････････127 5. PRESSURE TESTING･････････････････････････････････････････････････････････････････････････128 1) High Pressure Relief Valves･････････････････････････････････････････････････････････････････128 2) Low Pressure Relief Valve･･････････････････････････････････････････････････････････････････130 6.
Page 118: Hst Oil Flow Chart･･･････････････････････････････････････････････････････････････････････117
8 - HYDROSTATIC TRANSMISSION 1. HST OIL FLOW CHART Option (Remote control valve) HPL (Main) HPL Cylinder Control valve Flow priority valve Power steering Control Valve Power Steering Cylinder Filter Oil pump Filter Sump (Transmission)
Page 119: Trouble Shooting
8 - HYDROSTATIC TRANSMISSION 2. TROUBLE SHOOTING CONDITION POSSIBLE CAUSE REMEDY Tractor fails to move when tractor Parking brake is engaged Release parking brake directional pedal is depressed (HST output shaft does not rotate) Improper HST linkage adjustment or Inspect linkage adjust or repair as broken linkage necessary Damaged hydraulic pump...
Page 120 8 - HYDROSTATIC TRANSMISSION CONDITION POSSIBLE CAUSE REMEDY Hydraulic oil level incorrect Check fluid level and add or Low Power (HST output shaft remove hydraulic oil as needed not turning at full capacity) Hydraulic oil flow is restricted by Replace HST hydraulic filter clogged HST filter Air is mixing with hydraulic oil Check hydraulic oil level and line...
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8 - HYDROSTATIC TRANSMISSION 3. HST UNIT 1) Disassembly IMPORTANT: Before disassembling the HST unit, be sure that the work area is clean and free from foreign materials, as contamination will reduce the working life of the HST unit. When handling HST unit components, use care not to damage parts and components.
Page 122 8 - HYDROSTATIC TRANSMISSION 10. Remove the slot guide block, 16, from the displacement control shaft, 17. 11. Remove the snap ring, 18, securing the pump shaft, 10, in the housing. 12. Gently tap the pump shaft, 10, with a mallet to remove it from the housing. NOTE: Pump shaft seal, 19, Seal spacer ring, 20, and bearing spacer washer, 21, will be free when pump shaft, 10, is driven from the housing.
Page 123 8 - HYDROSTATIC TRANSMISSION 2) Inspection 1. Wash all parts in a suitable solvent and allow to air dry. 2. Discard all O-rings and seals from parts removed during HST disassembly. Replace all O rings and seals with new parts when assembling the HST unit.
Page 124 8 - HYDROSTATIC TRANSMISSION 14. Inspect the needle bearings, 1, in the port bock, 2, for excessive play or damage. Replace the port block if the bearings are damaged or worn. 15. Inspect the motor shaft and pump shaft for scoring, nicks, worn splines or other damage.
Page 125 8 - HYDROSTATIC TRANSMISSION Install the pump cylinder block thrust washer and spring on the pump shaft, 10. 18. Install the bottom thrust bearing race, 11-a, thrust bearing, 11-b, top thrust bearing race, 11-c, in the motor side of the housing. 19.
Page 126 8 - HYDROSTATIC TRANSMISSION 4) Installation (Differential housing attached to tractor frame) 1. Lubricate new O-rings, 1, and install with the collar, 2. Carefully install the HST unit, 3, onto the front of the differential housing. 3. Install the four retaining bolts, 4, through the HST unit, 3, into the housing.
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8 - HYDROSTATIC TRANSMISSION 4. HST ADJUSTMENT 1) Neutral Adjustment Use a floor jack to raise the tractor until all four wheels are off the ground. Support the tractor with suitable jack stands. Place the transmission range control lever in the neutral position.
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8 - HYDROSTATIC TRANSMISSION 2) Pedal Adjustment 1. The HST pedals should be at the same angle to operator deck and parallel with each other when adjusted properly. 2. To adjust the forward and reverse pedal position, remove the center deck from the tractor. 3.
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8 - HYDROSTATIC TRANSMISSION 5. PRESSURE TESTING 1. Disconnect the wire harness plugs, under the fenders, for the rear lights. 2. Remove the tool box, lights support, 1, and ROPS, 2, from the tractor. 3. Remove the grips, 3, from the control levers. 4.
Page 130 8 - HYDROSTATIC TRANSMISSION Stop the engine. If the pressure reading is not at the specified value, replace the forward high pressure relief valve, 1. Tighten the relief valve cap plug, 2, to 40.7 – 95 N･m (4.2 – 9.7 kgf･m). NOTE: The forward and reverse, high pressure relief valves are not interchangeable.
Page 131 8 - HYDROSTATIC TRANSMISSION 2) Low (Charge) Pressure Relief Valve 1. Remove either plug “A” or “B” from the port block. 2. Install a 0 – 3.5 MPa (0 – 35 kgf/c ㎡) pressure gauge in the open “A” or “B” port. 3.
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8 - HYDROSTATIC TRANSMISSION 6. HST ELECTRIC CRUISE CONTROL 1) Description of Operation The HST cruise control, uses a switch and an electric magnetic to lock the HST linkage in any position to maintain the tractor at a constant ground speed for forward or reverse directions.
Page 133 8 - HYDROSTATIC TRANSMISSION Switch Testing If there is no continuity, the switch is defective and needs NOTE: Switch terminals are identified on the replaced. terminal end of the switch. Numbers 1 and 4 do not Continue to hold ohmmeter test probes to terminal have terminals and are blank.
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8 - HYDROSTATIC TRANSMISSION 3) Cruise control Magnet Description and Location The Cruise Control magnet, 1, is located under the right side operator’s platform and is attached to the hydrostatic transmission linkage. The cruise control magnet is a simple electromagnet. When the cruise control switch is activated, current is supplied to the magnet.
Page 135: Cruise Relays･････････････････････････････････････････････････････････････････････････････134
8 - HYDROSTATIC TRANSMISSION Magnet Installation 1. Slide magnet, 1, with busing, 2, onto magnet pivot shaft, 3. Align stopper lever “A” with hole “B” pivot shaft bracket. 2. Attach latch plate, 4, to pedal pivot using one M6 x20 bolt, 5, and nut, 6. 3.
Page 136 8 - HYDROSTATIC TRANSMISSION (Normally Closed Relay) The function circuit, 1, is normally closed when current is not being supplied to the coil, 2. If a circuit with an SPST relay is energizes with current on the tractor, the switch, 1, becomes open and the circuit is not completed.
Page 137 8 - HYDROSTATIC TRANSMISSION Relay Testing Testing Cruise Latch Relay (Normally Open) Using an ohmmeter, connect test probes to terminals “C” and “D” on the relay and observe the ohmmeter reading. There should be high resistance between terminals “C” and “D” on the relay; observe the ohmmeter reading.
Page 138: Cruise Diode･････････････････････････････････････････････････････････････････････････････137
8 - HYDROSTATIC TRANSMISSION Testing Cruise Brake Relay (Normally Closed) Using an ohmmeter, connect test probes to terminals “C” and “D” on the relay and observe the ohmmeter reading. There should be low resistance between terminals “C” and “D” on the relay; indicating continuity and that the relay is functioning properly when un-energized.
Page 139 8 - HYDROSTATIC TRANSMISSION Diode Testing Using an ohmmeter connect the black, negative (-) test probe to diode terminal “B”. Touch the red, positive (+) test probe to diode terminal “A”. Observe the ohmmeter. The ohmmeter should show low resistance, indicating continuity and that current is flowing through the diode in that direction.
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8 - HYDROSTATIC TRANSMISSION 6) Cruise Control Circuit...
Page 141 8 - HYDROSTATIC TRANSMISSION Reference Figure 50. current is transferred from terminal 5 to terminals 6 Current flow starts at the battery positive (+) of the switch. Current exits the switch from terminal and is transferred to the starter battery terminal 6 and travels to the coil side of the cruise terminal by the positive (+) battery cable.
Page 142 8 - HYDROSTATIC TRANSMISSION 11. The cruise system has a indicator light: A. Cruise control switch. NOTE: The indicator lights work in unison but are controlled separately. The indicator light of the cruise control switch has constant ground path provided to terminal 8 of the switch by the cruise control master connector.
Page 143 8 - HYDROSTATIC TRANSMISSION 7) Troubleshooting HST CRUISE CONTROL CIRCUIT CONDITION POSSIBLE CAUSE REMEDY Cruise will not activate Blown 25 amp fuse Replace 25 amp fuse Malfunctioning cruise control switch Test switch, replace if necessary Brake switch stuck in closed position Test switch, replace if necessary Malfunctioning cruise latch or cruise Check relays, replace if necessary...
Page 144 9 - PTO CONTENTS 1. SPECIFICATIONS････････････････････････････････････････････････････････････････････････････144 2. TROUBLESHOOTING･･･････････････････････････････････････････････････････････････････････145 3. DISASSEMBLY･･････････････････････････････････････････････････････････････････････････････146 1) PTO Clutch･･････････････････････････････････････････････････････････････････････････････146 2) PTO Clutch shaft･････････････････････････････････････････････････････････････････････････146 3) PTO Change lever････････････････････････････････････････････････････････････････････････147 4) Rear case cover･･･････････････････････････････････････････････････････････････････････････147 5) PTO Shift rod and input shaft････････････････････････････････････････････････････････････････148 6) Mid PTO Shaft and gears･･･････････････････････････････････････････････････････････････････150 4. INSPECTION････････････････････････････････････････････････････････････････････････････････152 5.
Page 145: Specifications
9 - PTO 1. SPECIFICATIONS PTO System Type･････････････････････････････････････････････････････････････････････････････Independent (Live) Clutch Type･･･････････････････････････････････････････････････････････････････････････････････Wet Clutch Material････････････････････････････････････････････････････････････････････････Asbestos Free Fiber Clutch Plate Quantity･････････････････････････････････････････････････････････････････････････4 Metal Clutch Plate Quantity･････････････････････････････････････････････････････････････････････････4 Minimum Filter Clutch Plate Thickness･･･････････････････････････････････････････････････1.4 mm (0.055”) Actuation･････････････････････････････････････････････････････････････････････････････Manual Lever Rear PTO Shield Type････････････････････････････････････････････････････････････････････････Flip-up Number of Splines (Rear PTO Output Shaft)･･･････････････････････････････････････････････････････････6 Number of Splines (Mid PTO Output Shaft)･･･････････････････････････････････････････････････････････15 Number of shaft･･････････････････････････････････････････････････････････････････････････････････2 PTO Speed･･･････････････････････････････････････････････････････････････540 rpm @ 2292 RPM Engine...
Page 146 9 - PTO 2. TROUBLSHOOTING CONDITION POSSIBLE CAUSE REMEDY PTO Slippage 1. PTO linkage out of adjustment 1. Adjust linkage 2. Worn fiber clutch plates 2. Replace the fiber clutch plates 3. Low hydraulic fluid level 3. Add hydraulic fluid to proper level 4.
Page 147 9 - PTO 3. DISASSEMBLY 1)PTO CLUTCH PTO clutch Removal 1. Separate the transmission/differential housing from the tractor. See “1-5 Separating the Tractor” in this manual. 2. Remove the HST unit from the front cover. NOTE: The PTO system is not serviceable in the tractor.
Page 148 9 - PTO 3) PTO CHANGE LEVER Removal 1. Drive out the roll pin, 1, and remove the change lever, 2, from the shift arm, 3. 2. Remove the bolt, 4, and retaining plate, 5. 3. Remove the bolt, 6, seal washer, 7, spring (ℓ = 38 mm) , 8, and detent ball, 9, from the housing.
Page 149 9 - PTO 3. Remove the snap ring, 1, and carefully tap the PTO output shaft, 2, towards the rear, out of the case cover. 4. Remove the countershaft bearing, 3, and rear output shaft bearing, 4, from the cover. NOTE: With output shaft bearing, 4, removed, carefully observe if shims were used between the case cover and output shaft bearing.
Page 150 9 - PTO 5. Remove the sliding collar, 1, from the PTO input shaft, 2. 6. Remove the needle bearing, 1, from the rear of the PTO input shaft. 7. Remove the snap ring, 1, from the front of the PTO input shaft, 2.
Page 151 9 - PTO 9. Remove the front, PTO input bearing, 1, from the housing. 10. Remove the snap ring, 1, thrust washers, 2, 18T counter gear, 3, and needle bearing, 4, from the PTO input shaft, 5. 11. Remove the PTO shift arm, 1, from the housing. 12.
Page 152 9 - PTO 4. Remove the rear PTO input shaft bearing, 1, from the housing. 5. Remove the differential and differential lock linkage from the housing. See Section 27, “Differential-Removal” for removal procedure. 6. Remove the snap ring, 1, and 28T fixed gear, 2, from the housing.
Page 153 9 - PTO 4. INSPECTION 1. Wash all components in a suitable solvent and allow to air dry. 2. Inspect all bearings for excess wear, score marks, heat discoloration or other damage. Rotate all bearings slowly, by hand only, to check for roughness or binding. Replace as necessary. 3.
Page 154 9 - PTO 5. ASSEMBLY 1) MID PTO SHAFT AND GEARS Installation 1. If the sleeve was removed from the mid PTO shaft, press a new sleeve and the rear bearing onto the shaft prior to shaft installation. 2. Use a press to install the sleeve using no more than 980 N (100 kgf).
Page 155 9 - PTO 10. Install the front bearing, 1, into housing. 11. Install the rear bearing, 3, and snap ring, 4, onto the PTO drive shaft, 5. 12. Install the PTO drive shaft assembly into the housing and tap lightly to seat in the front bearing. 13.
Page 156 9 - PTO 2) PTO SHIFT ROD AND INPUT SHAFT Installation IMPORTANT: The oil grooves in the thrust washers, 1, must face the counter gear, 2, when assembled. 1. Install the thrust washers, 1, 18T counter gear, 2, and needle bearing, 3, on the PTO input shaft, 4. 2.
Page 157 9 - PTO 7. Install the sliding gear, 1, onto the rear of the PTO input shaft, 2. 8. Install the detent spring, 1, and detent ball, 2, into the housing. 9. Place the PTO shift fork, 1, on the collar, 2. 10.
Page 158 9 - PTO 3) REAR CASE COVER Assembly 1. Install a new oil seal, 1, into the PTO output shaft bore on the rear case cover. 2. Lubricate the oil seal I.D. with petroleum jelly. 3. Lubricate and install the countershaft bearing, 1, into the cover.
Page 159 9 - PTO Installation 1. Place a bead of liquid gasket eliminator on the mating surface of the rear case cover, 1. 2. Carefully align the dowels in the housing with the hole in the cover. 3. Work the cover into place until seated. DO NOT force the cover or damage will result.
Page 160 9 - PTO 6) Clutch and front cover Disassembly 1. Remove the retaining ring, 1, backing ring, 2, fiber clutch plates, 3, and separator plates, 4, from the clutch housing. 2. Place the clutch housing, 1, in a suitable press. 3.
Page 161 9 - PTO 6. Remove the washer, 1, and spring, 2, from the clutch hub. 7. Place the clutch in a press and press down on the clutch lifter, 1, to release any tension on the retaining ring, 2. 8. Remove the retaining ring, 1, and remove the clutch from the press.
Page 162 9 - PTO 10. Place the clutch assembly in a soft jawed vise. Heat the thread ends of the bolts at the backing plate to soften the thread-locking compound. 11. Loosen and remove the four clutch retaining bolts, 1, evenly, to avoid binding and possible damage to the machined surfaces of the clutch components.
Page 163 9 - PTO 15. Remove the retaining ring, 1, from the clutch lifter, 16. Remove the release hub, 3, from the clutch lifter, 2. 17. Remove the thrust bearing races, 1, and release bearing, 2, from the clutch lifter, 3. Inspection 1.
Page 164 9 - PTO Assembly IMPORTANT: Prior to assembly, use clean hydraulic fluid to coat all parts. IMPORTANT : The two thrust bearing races have different inside diameters. The thrust bearing race with the larger I.D., 1, is placed in the clutch lifter while the smaller I.D.
Page 165 9 - PTO 6. Install the pressure plate, 1, onto the clutch hub, 2. IMPORTANT: The pressure plate has a flat, machined surface and a non-machined surfaced. The machined surface must face up (contacting the brake disc). 7. Soak the brake disc, 1, in clean hydraulic fluid for one hour (minimum) prior to installation.
Page 166 9 - PTO 12. Position the clutch lifter, 1, into the hub, 2, and onto the four springs, aligning the four bolt holes. 13. Apply a small amount of thread-locking compound to the four bolts, 1. 14. Thread the four bolts, 1, and sleeves, 2, into the backing plate.
Page 167 9 - PTO IMPORTANT: Position the retaining ring as shown. The ends of the ring must be located in the groove. Do not position the ends of the ring at an open area of the hub. 23. Install the retaining ring, 1, into the clutch hub, 2, to secure the clutch pack in the hub.
Page 168 9 - PTO 5. ADJUSTMENT 1. Position the 25mm (1 inch) wood block or the like to the PTO clutch lever travel. 2. Attach a pair of pliers, 1, to the rear PTO shaft. 3. Untighten the lock nut, 1, and rotate the bolt, 2, until the pliers (rear PTO shaft) can be rotate.
Page 169 10 - BRAKES CONTENTS 1. OVERHAUL･････････････････････････････････････････････････････････････････････････････････169 1) Removal････････････････････････････････････････････････････････････････････････････････169 2) Disassembly･････････････････････････････････････････････････････････････････････････････169 3) Inspection･･･････････････････････････････････････････････････････････････････････････････170 4) Assembly･･･････････････････････････････････････････････････････････････････････････････171 5) Installation･･････････････････････････････････････････････････････････････････････････････172 6) Adjustment･･････････････････････････････････････････････････････････････････････････････173...
Page 170 10 - BRAKES 1. OVERHAUL BRAKES 1) Removal IMPORTANT: Remove the transaxle from the tractor. See Section 27 for transaxle removal from the tractor. (Remove the ROPS: Lower, parking brake wire, bake rod and brake lever from the transaxle before remove the transaxle) 1.
Page 171 10 - BRAKES 3. Remove the brake actuator plate, 1, from the axle housing, 2. 4. Remove the four steel balls, 1, and the retaining ring, 2, from the brake actuator shaft, 3. Remove the shaft, 3, from the axle housing, 4. 5.
Page 172 10 - BRAKES 2. Inspect the stators for excessive wear or damage. Use a micrometer to measure the level difference of the stator. Replace the stator if the level difference is more than 0.1 mm or if the stator contact surfaces show signs of scoring or damage. 3.
Page 173 10 - BRAKES 4. Connect the brake spring, 1, to the brake actuator plate, 2. 5. Install the stators, 1, and the fiber brake discs, 2, into the axle housing, 3. 5) Installation 1. Position the axle housing, 1, on the differential housing, 2, aligning the mounting holes and the guide pins.
Page 174 10 - BRAKES 6) Adjustment (1) Foot brake ① Measure the brake pedal free travel. BRAKE PEDAL FREE TRAVEL to 25 – 30 mm. ② Loosen the locknut, 1, and turn the brake rods, 2, using weld nut, 3, to adjust the brake pedal free travel.
Page 175 10 - BRAKES (2) Parking (hand) brake Foot brakes are properly adjusted at first and adjust the parking brake as follows: 1. Place the hand brake on the first latch. 2. Connect the wire and brake lever with pin. 3. Pull up the wire outer 1～2 kgf and place on the wire holder.
Page 176 11 - HYDRAULIC SYSTEM 1. LIFT CYLINDER REMOVEL･･････････････････････････････････････････････････････････････････177 2. LIFT CYLINDER DISASSEMBLY･･･････････････････････････････････････････････････････････････178 3. INSPECTION AND REPAIR････････････････････････････････････････････････････････････････････180 4. ASSEMBLY･････････････････････････････････････････････････････････････････････････････････181 5. CONTROL VALVE ASSEMBLY (HPL) ･･････････････････････････････････････････････････････････182 1) Disassembly･････････････････････････････････････････････････････････････････････････････185 2) Assembly･･･････････････････････････････････････････････････････････････････････････････190 6. LIFT COVER INSTALLATION･････････････････････････････････････････････････････････････････191 7. HYDRAULIC SYSTEM CIRCUIT ADJUSTMENT･････････････････････････････････････････････････192 1) Feedback Plate Adjustment･･････････････････････････････････････････････････････････････････192 8.
Page 177: Hydraulic System
11 - HYDRAULIC SYSTEM 12. TROUBLESHOOTING････････････････････････････････････････････････････････････････････････204 13. PRESSURE TESTING･････････････････････････････････････････････････････････････････････････205 1) Main system relief valve････････････････････････････････････････････････････････････････････205...
Page 178 11 - HYDRAULIC SYSTEM 1. LIFT CYLINDER REMOVAL Separate the lift cylinder assembly from the transmission housing. “SECTION Separating the Tractor” in this Manual. Remove the eight retaining bolts, 2, securing the lift cover to the main transmission housing. Using a suitable overhead hoist and chains or slings, remove the lift cover, 3, from the top of the main transmission housing.
Page 179 11 - HYDRAULIC SYSTEM 2. LIFT CYLINDER DISASSEMBLY 1. Bolt 7. Rocker shaft 13. Spring 19. Guide 2. Control valve 8. Snap ring 14. O-ring 20. Valve stem 3. O-ring 9. Lift arm (R.H.) 15. Spring 21. O-ring 4. O-ring 10.
Page 180 11 - HYDRAULIC SYSTEM Remove the piston, 16, from the cylinder. Remove the nut, 17, flow control valve knob, 18, guide, 19, and screw the valve stem, 20 out of the body.
Page 181 11 - HYDRAULIC SYSTEM 3. INSPECTION AND REPAIR Thoroughly clean all parts in a suitable solvent and air dry. Inspect the lift cover rocker shaft bushings for excess wear or damage. If necessary, use a suitable driver to install new bushings to the depth shown. NOTE: The bushings vary in diameter.
Page 182 11 - HYDRAULIC SYSTEM 1. Bolt 7. Rocker shaft 13. Spring 19. Guide 2. Control valve 8. Snap ring 14. O-ring 20. Valve stem 3. O-ring 9. Lift arm (R.H.) 15. Spring 21. O-ring 22. O-ring 4. O-ring 10. Ram arm 16.
Page 183 11 - HYDRAULIC SYSTEM 5. CONTROL VALVE ASSEMBLY (HPL) The control valve assembly is located outside the hydraulic lift cover and contains the control valve spool, 1, check valve, 4, check valve, 2, flow priority valve, 3, safety valve, 5, and relief valve, 6. 1.
Page 184 11 - HYDRAULIC SYSTEM 1. Control Valve Spool safety valve opens and allows the cylinder. 2. Check Valve 3. Flow Priority Valve 4. Lift Check Valve 5. Safety Valve Check valves The check valve, 2, is located in the spool, 1, is opened by oil pressure while the spool, 1, is in the raised position.
Page 185 11 - HYDRAULIC SYSTEM 6. Relief Valve 7. Detent ball 8. Drop Rate Control Valve 9. Sump 10. Hydraulic Pump 11. Hydraulic Cylinder Detent Ball The two detent balls, 7, with spring installed in the spool, 1, for holds the spool at the lowering position or raising position.
Page 186 11 - HYDRAULIC SYSTEM 1. Check valve 8. Spring 2. Cover 9. Steel ball 3. Safety valve 10. Spring 4. Relief valve 11. Roll pin 5. Plug 12. Control lever 6. Flow priority valve 13. Bracket 7. Spool 14. Valve body 1) Disassembly 7.
Page 187 11 - HYDRAULIC SYSTEM (1) Lift check valve Disassembly 1. Use internal ring pliers to remove the internal retaining ring, 1, from the valve body, 2. 2. Remove the spring, 3, and ball, 4, from inside the valve body, 2. 3.
Page 188 11 - HYDRAULIC SYSTEM (2) Safety valve Disassembly Loosen and remove the end plug, 1, from the main valve body, 2. Remove the sealing O-ring, 3, from the end plug, Remove the shims, 4, spring, 5, and ball-end poppet, 6, from the valve body, 2. NOTE: Observe and record the number and total thickness of shims, 4, located next to the spring.
Page 189 11 - HYDRAULIC SYSTEM (4) RELIEF VALVE the end of the valve body. Disassembly Loosen and remove the end plug, 1, from the main valve body, 2. Remove the sealing O-ring, 3, from the end plug, Remove shims, 4, the spring, 5, seal, 6, and poppet, 7, from the valve body, 2.
Page 190 11 - HYDRAULIC SYSTEM (4) Spool Disassembly Place a punch or similar rod through the cross bore in the lever end of the spool, 1, to hold the spool during disassembly. Using a flat-bladed screwdriver, turn the slotted end of the spool actuator, 2, (protruding from the end of the cap subassembly, 3,) counterclockwise to separate it from the spool, 1.
Page 191 11 - HYDRAULIC SYSTEM CONTROL VALVE 2) Assembly Apply a thin coating of clean hydraulic fluid to all metal parts during assembly. Lightly lubricate new O-rings and seals with petroleum jelly. Slide the spool, 1, into the valve body, 2, from the rear side of the valve, and secure the cover, 3, to the valve with its two mounting bolts.
Page 192 11 - HYDRAULIC SYSTEM Using three new large O-rings, 1, and one new small O-ring, 2, re-seat the control valve on the RH side of the lift cover and secure it in place with three mounting bolts, 3. Torque the mounting bolts to 27 –...
Page 193 11 - HYDRAULIC SYSTEM 7. HYDRAULIC SYSTEM CIRCUIT ADJUSTMENT 1) Feedback Plate Adjustment 1. When the engine is running, moving the lift control lever to the ‘raise’ position causes the lift arms to rise. If the lift arms reach their highest position with the control lever still in the ‘raise’...
Page 194: Hydraulic Pump
11 - HYDRAULIC SYSTEM 8. HYDRAULIC PUMP The only serviceable parts on the hydraulic pump are the shaft seal and internal O-rings. If troubleshooting indicates a faulty pump, replace the pump with a new assembly. 1) Removal 1. Disconnect the inlet and outlet hydraulic lines, 1, from the pump.
Page 195: Oil Filter
11 - HYDRAULIC SYSTEM 4) Assembly Apply a thin coating of clean hydraulic fluid to all metal parts during assembly. Lightly lubricate all seals and O-rings with petroleum jelly. Place the pump body, 3, in a soft-jawed vice. Install the inner wear plate, 4, into the pump body.
Page 196 11 - HYDRAULIC SYSTEM 10. REMOTE CONTROL VALVES 1) Description and operation The tractors may be equipped with a single-spool remote control valve, 1. This optional valve controls the operation of rear-mounted drawbar or three-point hitch implements. It can also be plumbed to control front-mounted momentary-action accessories, such as snow blowers, and front blades.
Page 197 11 - HYDRAULIC SYSTEM 1. Remote Cylinder 7. Reservoir 2. Implement A. To Cylinder (Rod End) 3. Remote Valve Spool B. To Cylinder (Piston End) 4. Main Control (HPL) Valve P. Pump Pressure 5. Hydraulic Pump T. Return to Tank 6.
Page 198 11 - HYDRAULIC SYSTEM 1. Remote Cylinder 7. Reservoir 2. Implement A. To Cylinder (Rod End) 3. Remote Valve Spool B. To Cylinder (Piston End) 4. Main Control (HPL) Valve P. Pump Pressure 5. Hydraulic Pump T. Return to Tank 6.
Page 199 11 - HYDRAULIC SYSTEM 1. Remote Cylinder 7. Reservoir 2. Implement A. To Cylinder (Rod End) 3. Remote Valve Spool B. To Cylinder (Piston End) 4. Main Control (HPL) Valve P. Pump Pressure 5. Hydraulic Pump T. Return to Tank 6.
Page 200 11 - HYDRAULIC SYSTEM 1. Mounting Bracket 14. Hydraulic Hose (610 mm) 2. Bolt, Flanged M8×20 15. Hydraulic Hose (305 mm) 3. Bolt M8×55 16. Control Lever 4. Flanged Nut M8 17. Nut M8 5. O-ring 18. Poppet Valve 6. Eye bolt 19.
Page 201 11 - HYDRAULIC SYSTEM SINGLE-SPOOL VALVE (Rear Remote Valve) Disassembly 1. Remove the two socket head caps crews, 1, and the two end plates, 2, from the lever (upper)end of the valve. 2. Remove the two socket head cap screws, 3, and end cap, 4, from the opposite end of the valve.
Page 202 11 - HYDRAULIC SYSTEM 1. Valve Assembly 8. Hydraulic Hose (610 mm) 2. Mounting Bracket 9. Hydraulic Hose (305 mm) 3. Bolt M8×55 10. Adapter 4. Spring Washer 11. Adapter 5. Hex Nut M8 12. Eye-bolt Fitting 6. Spring Pin 13.
Page 203 11 - HYDRAULIC SYSTEM 4) Troubleshooting – front and rear remote valves PROBLEM POSSIBLE CAUSE CORRECTION Oil not supplied to remote valve Poppet 340170890 not installed HPL Install poppet valve Improper hydraulic line routing between Check line routing according to repair HPL valve and remote valve.
Page 204 11 - HYDRAULIC SYSTEM 11. MOWER LIFT LINKAGE Description and Operation The mower deck, 8, is raised to its highest position when the hydraulic control lever, 3, is in the “raise” position. When the mower cutting height lever, 4, is in the “locked” position (lever fully rearward), the mower deck height is locked, and the HPL system can be freely used without affecting the mower deck.
Page 205: Troubleshooting
11 - HYDRAULIC SYSTEM 12. TROUBLESHOOTING CONDITION POSSIBLE CAUSE CORRECTION Implement fails to rise when lever is in Relief valve setting too low Perform system relief valve pressure raised position (or implement falls too test quickly when engine is stopped) Faulty safety valve Repair or replace safety valve O-ring failure on piston or on control...
Page 206 11 - HYDRAULIC SYSTEM 13. PRESSURE TESTING 1) Main system relief valve Remove the plug from the upper port on the RH side of the HPL control valve, and install in its place a 0 – 20 MPa (0 – 200 kgf/c ㎡) pressure gauge, 1.
Page 207 12 - POWER STEERING CONTENTS 1. DESCRIPTION AND OPERATION･･････････････････････････････････････････････････････････････208 2. POWER STEERING CONTROL VALVE･･････････････････････････････････････････････････････････209 1) Removal････････････････････････････････････････････････････････････････････････････････210 2) Disassembly･････････････････････････････････････････････････････････････････････････････210 3) Inspection･･･････････････････････････････････････････････････････････････････････････････213 4) Assembly･･･････････････････････････････････････････････････････････････････････････････214 5) Installation･･････････････････････････････････････････････････････････････････････････････218 3. CONTROL VALVE ASSEMBLY (HPL)･･･････････････････････････････････････････････････････････220 1) Disassembly･････････････････････････････････････････････････････････････････････････････220 2) Inspection･･･････････････････････････････････････････････････････････････････････････････220 3) Assembly･･･････････････････････････････････････････････････････････････････････････････220 4. STEERING CYLINDER･･･････････････････････････････････････････････････････････････････････221 1) Removal････････････････････････････････････････････････････････････････････････････････221 2) Disassembly･････････････････････････････････････････････････････････････････････････････222 3) Inspection･･･････････････････････････････････････････････････････････････････････････････222 4) Assembly･･･････････････････････････････････････････････････････････････････････････････223...
Page 208 12 - POWER STEERING 2) Steering control relief valve adjustment･･･････････････････････････････････････････････････････226 9. SPECIFICATIONS････････････････････････････････････････････････････････････････････････････229...
Page 209 12 - POWER STEERING 1. DESCRIPTION AND OPERATION The power steering system is standard equipment. The system consists of a power steering control valve, pump, reservoir, cylinder assembly and tubing. Fluid drawn from the transmission reservoir (sump), 8, is pressurized by the oil pump, 2,. The fluid flows from the oil pump to the HPL (Hydraulic Power Lift) control valve, 3, and is directed to the power steering and HST circuit, 7, with the remaining oil flow returned to the reservoir or directed to the hydraulic cylinder via the control valve spool.
Page 210 12 - POWER STEERING 2. POWER STEERING CONTROL VALVE 4. A diametrically extending pin, 6, is loosely fitted to 1. The spool, 20, and sleeve, 21, constitute a rotary the drive shaft, 14, at the center and to the sleeve, 21, valve for selectively changing the fluid passage as with clearance between the pin and the radial holes in well as the direction of pressurized fluid flow.
Page 211 12 - POWER STEERING 1) Removal Remove the steering wheel, rubber, HST fan cover, center cover, accelerator grip and dash board from tractor refer “SECTION SEPARATING THE TRACTOR. Disconnect the pressure tube, 2, return tube, 3, left turn tube, 4, and right turn tube, 5, from the control valve, 1, and move them clear of the valve.
Page 212 12 - POWER STEERING Slide the gerotor pump rotor, 4, and stator, 2, from the spacer plate, Remove the large O-ring (not shown) that fits between that stator, 2, the spacer plate, a smaller O-ring and the seal ring, 1, which fits between the rotor, 4, and the end cap.
Page 213 12 - POWER STEERING Remove the O-ring, 2, dust seal, 1, and quad ring, 3, from the gland bushing. Remove the thrust bearing, 1, and the two bearing races, 2, from the body. Pull the sleeve and spool, 1, from the bottom of the valve housing.
Page 214 12 - POWER STEERING 10. Remove the pin, 1, from the sleeve, 2, and spool, 3, assembly. 11. Push the spool, 1, upward and slightly out of the sleeve while pulling the centering springs, 2, outward. Then remove the spool from the bottom side of the sleeve, 3.
Page 215 12 - POWER STEERING 4) Assembly Slide the spool, 1, into the sleeve, Position the spool so that the centering spring slots, 3, on the spool and sleeve line up, allowing for the installation of the centering springs. With the centering spring slots lined up, insert the special tool, 1, in the slots as shown.
Page 216 12 - POWER STEERING Position the spool and sleeve so that their ends are flush and insert the pin, 1, through the assembly until its ends are below the surfaces of the sleeve. Orient the spool and sleeve, 1, so that the pin is horizontal to the bench and carefully insert the assembly into the bottom of the steering valve housing, Rotate the assembly slightly while...
Page 217 12 - POWER STEERING Install the retaining ring in the housing groove. 10. Position the steering valve housing in a vise with the bottom end facing Up. To avoid damaging the steering valve housing, use a fitting installed in one of the ports to grip the steering motor. Thread a fitting, 1, into one of the ports (as shown) and use it to mount the valve in the vise.
Page 218 12 - POWER STEERING 15. Coat a new O-ring, 1, and seal ring, 2, with clean hydraulic fluid and install them on the rotor. Install a new O-ring, 4, in the groove on the stator, 5, and then fit the rotor and stator together so that their O-rings are on opposite sides.
Page 219 12 - POWER STEERING Tighten the end cap retainer bolts, 1, in the number sequence shown in figure in two stages. First, torque the bolts to about 1 N-m (0.1 kgf･m) and then to 17 N-m (1.7 kgf･m), following the number sequence shown in the figure.
Page 220 12 - POWER STEERING Temporarily place the cowling, 1, on the tractor and connect the engine tachometer cable and wire connectors. Next, secure the dashboard to the tractor with the cowling retaining bolts, 2, and install the engine speed control lever, 3. Install the steering wheel cover, 5, steering wheel, 4, lock washer, 3, and nut, Tighten the nut to 30 N.m (3 kgf･m).
Page 221 12 - POWER STEERING 3. CONTROL VALVE ASSEMBLY (HPL) 1) Disassembly - Flow Priority Valve The only component on the control valve assembly (HPL) that will be disassembled, is the flow priority valve. Remove the retaining plug, 1, flow priority valve, 2, and spring, 3.
Page 222: Steering Cylinder
12 - POWER STEERING 4. STEERING CYLINDER 1) Removal 1. Disconnect the oil pipes, 1, from the adapters, 2. 2. Remove the retaining bolt and hose clamp, 3. 3. Remove the nuts and adapters, 2, from the frame. 4. Place a floor jack under the front axle assembly. 5.
Page 223 12 - POWER STEERING 10. Remove the cylinder assembly, 1, from the front axle assembly, 2, by removing the two mounting brackets, 3. 2) Disassembly IMPORTANT : Use a propane torch to heat the tie rod end at the cylinder rod to soften the thread locking compound to ease removal of the tie rod end from the cylinder rod.
Page 224 12 - POWER STEERING 4) Assembly Lubricate a new dust seal, 1, with petroleum jelly and install into the gland, 2. Be sure to install dust seal with open side facing towards the cylinder end of the gland body. Lubricate a new U ring, 3, with petroleum jelly and install into the gland, 2.
Page 225 12 - POWER STEERING 5. HYDRAULIC PUMP 7. TROUBLESHOOTING The hydraulic pump provides hydraulic fluids to the Most malfunctions in the steering system can usually be HST system, power steering system and HPL (hydraulic traced to dirt or foreign matter in the system. Dirt can power lift) system.
Page 226 12 - POWER STEERING TROUBLESHOOTING CONDITION POSSIBLE CAUSE REMEDY Hard Steering 1. ORBITROL (Control Valve Unit) (1) ORBITROL not aligned to steering Reposition ORBITROL (If loosening column its mounting bolts lightens the steering wheel load, it means that the control valve unit was in misalignment) (2) Spool-and-and sleeve combination Replace...
Page 227 12 - POWER STEERING 8. PRESSURE TESTING 1) Pump, Steering valve and relief valve With the tractor engine stopped, disconnect one of the hydraulic lines, 1, that run to the steering cylinder. Access to these lines are from the left side of the tractor, and behind the side panel below the cowl.
Page 228 12 - POWER STEERING 4. Remove the knob, 1, on the engine speed control lever. Remove the cowling retaining bolts, 2, and slightly raise up the cowling. Disconnect the tachometer cable and wire connectors under the dashboard. 5. Remove the cowling. 6.
Page 229 12 - POWER STEERING 10 Remove the relief valve cap, 1, by turning counterclockwise, the relief valve is located underneath the cap. Using a 6mm allen wrench, turn relief valve clockwise to increase pressure and counterclockwise to decrease pressure. NOTE: One complete revolution of the relief valve equals to an increase or decrease of 2.74 ±...
Page 230 12 - POWER STEERING 9. SPECIFICATIONS - POWER STEERING Hydraulic Pump Rotation Counterclockwise Capacity 18.4 L Power Steering Type Full Hydraulic Flow Priority Valve (flow rating) 7 liter/min Steering Cylinder Stroke 140 mm Bore 40 mm Relief Valve (At unit of steering control valve) 8 LPM Flow Rate Pressure...
Page 231 13 - ELECTRICAL SYSTEM CO NTE NTS 1. INTRODUC TION････････････････････････････････････････････････････････231 2. COMPOR NENT LOCATION･･･････････････････････････････････････････････233 3. DESCR IPTION OR TESTING･･････････････････････････････････････････････234 1) Battery･････････････････････････････････････････････････････････････234 2) Slow blow fuse･･･････････････････････････････････････････････････････23 4 3) Key swit ch･･････････････････････････････････････････････････････････235 4) Safety st art switch････････････････････････････････････････････････････235 5) Fuse block･････････････････････････････････････････････････････････...
Page 232 13 - ELECTRICAL SYSTEM 1. INTRODUTION Fuel Shutoff Solenoi d – Locat ed on the right of the engine, on the fuel Reference Fig ure 00 0. inj ection pump, fuel shutoff Compo nent Location and Functio n solenoid shuts off fuel flow to t he Battery –...
Page 233 13 - ELECTRICAL SYSTEM 15) Headlig ht – Located on the front of 24) Fuel Pum p – Located on the steering the tracto r, the headlight illuminates column , in the dashboard. The fuel the area i n front of the tractor. pump is operat ed when the key swit ch is “ON”, ”HEAT”...
Page 234 13 - ELECTRICAL SYSTEM 2. COMPONENT LOCATION...
Page 235 13 - ELECTRICAL SYSTEM 3. DESCRIPRION OR TESTING WARNI NG : Before working on any compo nent of t he electri cal system , the negative (-) battery cable should b e disconnected from the batt ery, a s elect rical shock or damage to system components may occur.
Page 236 13 - ELECTRICAL SYSTEM 3) Key swi tch ① Conduct continuit y test between terminal [3 0] and other terminals at each posit ion of the key switch. no continuit y is noticed between (○ ― ○ ), replace the switch. 4) Safety s tart switche s (1) Ra nge gear safety s tart switch Range g ear safety start switch is a...
Page 237 13 - ELECTRICAL SYSTEM 5) Fuse Block Descri ption The fuse block is located on th e l eft side of the rad iator in the engine co mpartment. The fuse block hold fuses that protect indivi dual ci rcuits tract or ’s electrical system.
Page 238 13 - ELECTRICAL SYSTEM (1) Safety Start relay (3 ) Low-be am lamp relay The relays coil i s energ ized when th e range relays coi l en ergi zed when safety swit ch and PTO clutch s afety switch low-beam l amp switch is closed, and then are both closed, and t hen stator motor i s low-beam l amps are illuminated.
Page 239 13 - ELECTRICAL SYSTEM 7) Fuel shutoff s olenoi d Descri ption and Location The fuel shu toff solenoi d is locat ed on the right side of the engine, threaded into the rear of the fuel injection pump. The fuel shut off contains a spring-lo cated plung er that pushes the i njection pump cont rol rack to the closed (shut -off) positi on when the sol enoid is not energized.
Page 240 13 - ELECTRICAL SYSTEM 8) Fuel level sending unit Descri ption and Location The fuel level sending u nit, 1, i s mounted on top of the fuel tank, 2, and extends into the t ank. The sending unit utili zes a float the raise a nd lowers with the fuel level inside the tank.
Page 241 13 - ELECTRICAL SYSTEM 9) Engine g low plugs Descri ption The engin e glow plug s, 1 , are located on the right si de engin e cylind er head, n ear the fuel injectors. The gl ow plugs are used to preheat the air in t he pre-combustion chamber.
Page 242 13 - ELECTRICAL SYSTEM 10) Diode for charge lamp Descri ption The diode, 1, is locat ed under t he starter, att ached to the t ractor wi ring harness . Diode i s elect rical devices which current is all owed to pass in one direction , di recting current within a circuit .
Page 243 13 - ELECTRICAL SYSTEM 11) Engine coolant temperature sending unit Descri ption The engine coolant t emperatu re s ending unit, 1, i s located on the l eft side of th e thermostat housi ng. The sendi ng unit regulates a variable resist ance t o ground, whi ch translates t o movement o f the temperature gauge on the instrument...
Page 244 13 - ELECTRICAL SYSTEM 12) Engine oil pressure switch Descri ption and Location The engine oil pres sure switch, 1, i s located in the front of the engine cylinde r head. The oil pres sure swi tch is located o n t op of cylinder head .
Page 245 13 - ELECTRICAL SYSTEM 13) Instrum ent panel – component operation and servicing Descri ptio n The indicato r and instrument light bulbs are the only servi ceable components of th e instrument panel. If any other part of the inst rument panel is found to be defective, the instrument panel must be repl aced as a uni t.
Page 246 13 - ELECTRICAL SYSTEM 5. Engine Oil Pressure Warning Light - 7. Fl asher and Hazard Pilot Light Th e engine oil pressure warning l ight flasher hazard pilot light alerts the operato r of low engine oil illuminated when the flasher or h azard pressu re.
Page 247 13 - ELECTRICAL SYSTEM Instrument Panel Removal 1. Remove the instrument p anel refer t o SEC TION 05 in this manual . NOTE: Keep the g rass face of the instrument panel after removal . This will prevent the sili con oi l in the fue l level and coolant temperature ga uges from leaking out causing t he ga uges to give a false indication during operation.
Page 248 13 - ELECTRICAL SYSTEM Fuel G auge Testing 1. Disconnect the in strument panel connector from the main wiring harness. 2. Using an ohmmeter, t ouch on e t est probe to th e “+” terminal, 1, of the fuel gauge and touch the other test probe to the “-“...
Page 249 13 - ELECTRICAL SYSTEM 14) Headlight s witch Descri ption The headlight switch is located on the right dashboard. This switch is dial type switch. The switch consists of low-beam light switch and high-beam lig ht switch. The low-beam switch is the three positions of the “OFF”, positioning light s “ON”...
Page 250 13 - ELECTRICAL SYSTEM 15) Headlight Descri ption The headl ights are located on th e front of the engine hood. The headlight assembli es cont ain a bulb each that may replaced if the bulb burn s out. Removal To remove the head light bulb as follows: 1.
Page 251 13 - ELECTRICAL SYSTEM 16) Glow l amp timer Descri ption and Location The glow plug indi cator light timer is an electronic timer t hat is located under th e engine cover on the rear l eft side of the radiator.
Page 252 13 - ELECTRICAL SYSTEM 17) Parki ng brak e swi tch (385200730) Descri ption Parking Brak e Light Swi tch The parking brak e li ght switch i s a single Troubl e-shooting – Continuity Test pole, push-butt on type switch.
Page 253 13 - ELECTRICAL SYSTEM 18) Combi natio n switc h descripti on The combination swit ch is located on th e left-hand side of the dashboard. combination s witch consists of hazard light switch, fl asher li ght switch and horn switch.
Page 254 13 - ELECTRICAL SYSTEM 19) Brak e lamp switch Descri ption The brake l amp switch is connected with brake l amp relay. The switch is cl osed when the bra ke pedal is depressed, and then brake l amp rel ay i s activated an d closed, and brake lam ps are illuminated.
Page 255 13 - ELECTRICAL SYSTEM 20) Flas her and hazard rela y Descri ption Flasher and hazard relay is in stalled nea r fuse blocks. The flasher and hazard relay controls th e flashing o f the t urn l ight and/or hazard light, and pilot l ight in the instrument panel by the turn signal swit ch or hazard light switch.
Page 256 13 - ELECTRICAL SYSTEM 22) Trailer socket The trailer socket is installed left side on the rear lig ht support. This socket i s a st andard seven pin socket . 23) High-beam rel ay (No. 385230250) The high-beam rel ay is installed in the engine compartment , and radiator left side.
Page 257 13 - ELECTRICAL SYSTEM 4. Using an ohmmeter, connect test probes to terminals “C” and “E” on the relay. Ob serve the oh mmeter reading. 5. There should be litt le or no res istance bet ween terminal s “C” an d “E”, indicating that there is conti nuity and...
Page 258 13 - ELECTRICAL SYSTEM 24) Fuel pump Descri ption The el ectric fuel pump , 1, is located at the base steering column supp ort underneath operat or ’s plat fo rm cowling. The pump i s operational when the key switch is i n the “ON” , “HEAT” o r “START”...
Page 259 13 - ELECTRICAL SYSTEM 25) Alternator (No.185046440) (1) Specifications and construction Clockwise Rotating direction (when viewed from pulley side) 13.5 V speed Less than 1350 rpm More than 10A (at 14V, 2500 rpm) Output current More than 40A (at 14V, 5000 rpm) (2) Cautions for handling Care should be taken to the following points when handling the alternator.
Page 260 13 - ELECTRICAL SYSTEM 3) Disassembly Reference Figure 61. Pulley Loosen and remove the pulley nut (1) with a box wrench while the hexagonal section of the pulley shaft is held firmly with STT. (STT stands for Service Tester & Tool.) b.
Page 261 13 - ELECTRICAL SYSTEM e. Rectifier Remove four screws (11) holding rectifier (8) and lead wire form stator (12). f. Bushing Remove bushing (13) and 4 bolts (14) which are holding the drive end frame (15) and rear end frame together.
Page 262 13 - ELECTRICAL SYSTEM (4) Inspection and repair for each component Pulley Check for fan belt slippage. b. Fan Check for deformation. Ball Bearing Rotate it by hand and check for resistance or noise in movement. Ball Bearing Inspection d. Stater ●...
Page 263 13 - ELECTRICAL SYSTEM ● Insulation resistance between slip ring and core pole. More than 0.1 MΩ when measured with a 500 V megger. ● Slip Ring Outer Diameter Example: Standard 14.4 mm Limit of use 14.0 mm Rectifier The circuit diagram of the rectifier is shown in Figure 70.
Page 264 13 - ELECTRICAL SYSTEM (5) Assembly Assembly is the reverse of the disassembly procedure. Be careful of the following points. Brush When a new brush is installed, it should protrude from brush holder by 1.5 mm. b. Rotor Brush Installation Before the rotor is installed, the brush should be pushed into the brush holder.
Page 265 13 - ELECTRICAL SYSTEM b. Check for alternator output current Turn headlight high-beam on (to put a load on the alternator) and take the output current reading while maintaining a speed of 2000 rpm. If the current reading is greater than the standard, the alternator is in good condition. Trouble Shooting.
Page 266 13 - ELECTRICAL SYSTEM Troubleshooting when charge lamp is turned on while the engine is running. Improper contact in alternator connector (B, IG and L) or disconnection in wiring (including IG circuit fuse) on vehicle or short circuit. Repair fault and start engine. Charge lamp is turned on.
Page 267 13 - ELECTRICAL SYSTEM (8) Care in Handling Charging System. (1) Pay attention to battery polarity and absolutely refrain from making a wrong connection. If it is wrongly connected, the battery will be short-circuited by the diode where it admits and enormously large current which will destroy the diode and regulator and burn the wiring harness out.
Page 268 13 - ELECTRICAL SYSTEM 26) Starting motor (TYPE 128000-0101 NIPPON DENSO) Specifications Continuous operation 30 seconds (max) Output 1.0 kW Weight 3.85 kg Rotating direction Clockwise (viewed from pinion) Clutch type Overrunning Engaging type Magnetic shift Pinion ejecting voltage 8 volts 1.
Page 269 13 - ELECTRICAL SYSTEM Disassembly ➀ Remove the connecting lead which connects the NOTE: magnetic switch and the yoke. 1. Do not damage the clutch bearing. 2. Never disassemble the magnetic switch. (If the ➁ Remove two thru bolts, which tighten the yoke to switch is found to be defective, replace as a the housing, from the end frame side.
Page 270 13 - ELECTRICAL SYSTEM (4) Inspection a. Armature ➀ Check the insulation between the commutator and the armature with 500 V megger. The armature is normal if there is resistance of more than 0.1 mega ohm. ➁ Layer insulation test (short-circuit test) Setting the armature on the growler tester, check the layer insulation.
Page 271 13 - ELECTRICAL SYSTEM Field coil ➀ Continuity test Using a circuit tester (× 1 ohm range), check continuity among the C terminal, field coil and brush. If there is continuity, the field coil is in satisfactory condition. ➁ Insulation test With a 500 V megger, check insulation between the field coil brush and yoke.
Page 272 13 - ELECTRICAL SYSTEM Clutch A. If the gear is excessively worm or damaged, replace it with new. B. Clutch operation ➀ The clutch should lock the gear when turning it to the normal revolving direction. And, it should allow the gear to turn freely when turning the gear in reverse direction.
Page 274 13 - ELECTRICAL SYSTEM (6) Troubleshooting a. The pinion does not move when the key switch is set to start position. Trouble Case Remedy Wiring Disconnection, loosened terminals of the battery or switch Repair and retighten. Key Switch Insufficient contact. No current flows. Repair the contact area or replace Pinion shaft helical spline is stucked and the pinion does not Starting motor...
Page 275 13 - ELECTRICAL SYSTEM 27) Safety start circuit...
Page 276 13 - ELECTRICAL SYSTEM 28) Position, low-beam, high-beam lighting circuit...
Page 277 13 - ELECTRICAL SYSTEM 29) Flasher and hazard lighting circuit...
Page 278 14 - SXM54/SXM60 MID MOUNT MOWER CONTENTS 1. Removal of the Mower Deck From the Tractor･･･････････････････････････････････････････････････277 2. Removal of 90°Gearbox, Blade Spindles and Pulley Holders･･････････････････････････････････････278 3. Disassembly of 90°Gearbox････････････････････････････････････････････････････････････････285 4. Installation of Gearbox, Blade Spindles and Pulley Holders･････････････････････････････････････････302 5. Installation of Mower Deck Onto Tractor･･･････････････････････････････････････････････････････305 6.
Page 279 14 - SXM54/SXM60 MID MOUNT MOWER 1. REMOVAL OF THE MOWER DECK FROM THE TRACTOR Remove and re-install the four gauge wheels, 1, in the sideways position. Secure the wheel spindles with the clevis pins, 2, and clips, 3. Pull the drive shaft locking collar, 1, towards the front of the tractor and slide the drive shaft, 2, off the PTO shaft, 3.
Page 280 14 - SXM54/SXM60 MID MOUNT MOWER Disconnect the rear linkage, 1, from the deck using the spring-loaded handle, 2. 10. Repeat for the opposite side. 11. Disconnect the front linkage, 1, from the mower deck using the spring-loaded handle, 2. 12.
Page 281 14 - SXM54/SXM60 MID MOUNT MOWER CAUTION When rolling the mower deck from under the tractor, be very careful not to strike the hydraulic filter with the mower deck. 17. Carefully roll the mower deck out from under the tractor. 2.
Page 282 14 - SXM54/SXM60 MID MOUNT MOWER 3. Remove cotter pin, 1, washer, 2, pin, 3, and separate drive shaft, 4, from gearbox, 5. 4. Turn the deck over, wedge a block of wood between the blade, 1, and the mower deck, 2, to prevent the spindles from turning.
Page 283 14 - SXM54/SXM60 MID MOUNT MOWER 5. Remove bolt, 1, joint, 2, blade retainers, 3, center blade, 4, and cover, 5. 6. Remove retaining ring, 6, and blade boss, 7, from the blade shaft. Remove all blades at this time, if necessary.
Page 284 14 - SXM54/SXM60 MID MOUNT MOWER 9. Remove grease fitting, 1, bolts, 2, mounting gearbox, 3, to the deck. 10. Lift the gearbox, 3, upward, removing it from the center pulley holder, 5. 11. Remove bolts, 4, securing the center pulley holder, 5, to the deck.
Page 285 14 - SXM54/SXM60 MID MOUNT MOWER 13. Remove nuts, 1, lock washers, 2, and washers, 3. Remove pulleys, 4, from right and left hand pulley holders, 5 and 6.
Page 286 14 - SXM54/SXM60 MID MOUNT MOWER 14. Remove bolts, 1, and holders, 2, from the deck top, 3. Remove the spindle assemblies, 5, 6, and shims, 4, (if equipped), from underneath the deck.
Page 287 14 - SXM54/SXM60 MID MOUNT MOWER 3. Components of 90°Gear Box Pinio Cove n shaft Beari Shim Beari O-rin Pinio Beari n gear Shim Pulle Seal Bevel Retai gear ning ring Gear Beari box case Bevel Retai gear shaft ning ring Retai ning ring Seal...
Page 288 14 - SXM54/SXM60 MID MOUNT MOWER DISASSEMBLY OF 90°GEAR BOX 1. Remove plug, 1, and drain oil from gearbox case, 2. 2. Using a puller, 1, remove pulleys, 2, from the bevel gear shaft, 3. 3. Remove key, 1, and retaining ring, 2, from bevel gear shaft, 3.
Page 289 14 - SXM54/SXM60 MID MOUNT MOWER 4. Remove bolts, 1, and cover, 2, from case, 3. NOTE; Take note to the quantities and the thickness of the shims, 3, used between the bearing and the cover. 5. Remove shims, 1, O-ring, 2, and drive the bevel gear shaft, 3, downward, out the bottom of the case.
Page 290 14 - SXM54/SXM60 MID MOUNT MOWER 7. Remove seal, 1, from bottom of case and discard. 8. Remove retaining ring, 1, and pull bearing, 2, out of case. 9. Remove seal, 1, from pinion shaft, 2, and discard.
Page 291 14 - SXM54/SXM60 MID MOUNT MOWER 10. Remove paint from inside edge of case, 1, to allow for bearing removal. Remove retaining ring, 2. Drive pinion shaft, 3, and bearings, 4, out of gearbox case. NOTE: Take note to the quantities and the thickness of the shim(s) used between the pinion gear and bearing.
Page 292 14 - SXM54/SXM60 MID MOUNT MOWER Inspection 1. Wash all components with a suitable solvent, allow to air dry. 2. Inspect all bearings for excessive wear, score marks, discoloration from overheating, or other damage. Rotate the bearings by hand and check for roughness while slowly rotating the inner and outer race.
Page 293 14 - SXM54/SXM60 MID MOUNT MOWER NOTE: Before installing seals into gearbox housing, coat outer edge of seal with grease. 3. Press seal, 1, on pinion shaft, down against retaining ring. 4. Insert pinion gear, 1, with shims. Use the same quantity and thickness removed in the disassembly procedure.
Page 294 14 - SXM54/SXM60 MID MOUNT MOWER NOTE: Before installing seals into gearbox housing, coat outer edge of seal with grease. 6. Press seal, 1, into gearbox housing, Seal must be flush with housing end surface. 7. Insert bearing, 1, onto bevel gear, Insert into gearbox housing, 3.
Page 295 14 - SXM54/SXM60 MID MOUNT MOWER 9. Install cover, 1, and bolts, 2. 10. Install key, 1, retaining ring, 2, onto bevel gear shaft, 11. Use a dial indicator, 1, to measure gearbox backlash. Backlash should be between 0.1 – 0.2 mm. If adjustments need to be made, proceed to "Initial Shimming Procedure"...
Page 296 14 - SXM54/SXM60 MID MOUNT MOWER 12. Press the pulley, 1, onto the bevel gear shaft, 2. 13. Refill the gearbox with oil, remove the check fill plug, 1, and add oil until excess exits the check hole. Use only SAE 80-90 W clear oil.
Page 297 14 - SXM54/SXM60 MID MOUNT MOWER Initial Shimming Procedure If new components are used during reassembly, the input and output gears backlash must be checked and adjusted if necessary. Install 0.5 mm of shims on each shaft. Check backlash and tooth contact. Adjust shims accordingly, to obtain the correct backlash, 0.1 - 0.2 Use Prussian Blue or white grease on gears to check tooth contact, toe to heal and depth.
Page 298 14 - SXM54/SXM60 MID MOUNT MOWER Disassembly of Center Pulley Holder 1. Remove oil seals, 1 and 6, and discard. 2. 2. Remove retaining rings, 2 and 4. Extract the bearings, 3, from the pulley holder, 5.
Page 299 14 - SXM54/SXM60 MID MOUNT MOWER Inspection Wash all components with a suitable solvent, allow to air dry. Inspect all bearings for excessive wear, score marks, discoloration from overheating, or other damage. Rotate the bearings by hand and check for roughness while slowly rotating the inner and outer race.
Page 300 14 - SXM54/SXM60 MID MOUNT MOWER 3. Insert two bearings, 1, one on top of the other. Insert retaining ring, 2, atop of second bearing. NOTE: Before installing seals into pulley holder, coat outer edge of seal with grease. 4. Press the bottom seal, 1, into pulley holder, 2. Seal must be seated 5 mm below surface of pulley holder.
Page 301 14 - SXM54/SXM60 MID MOUNT MOWER Disassembly of RH and LH Pulley Holders NOTE: The R.H. and L.H. blade shafts and pulley holders are different. The R.H. blade shaft, doesn't have a grease fitting and hole, while the L.H blade shaft does.
Page 302 14 - SXM54/SXM60 MID MOUNT MOWER Inspection Wash all components with a suitable solvent, allow to air dry. Inspect all bearings for excessive wear, score marks, discoloration from overheating, or other damage. Rotate the bearings by hand and check for roughness while slowly rotating the inner and outer race.
Page 303 14 - SXM54/SXM60 MID MOUNT MOWER 3. Insert top retaining ring, 1, securing the bevel shaft and bearings, 2, into the pulley holder. NOTE: Before installing seals into pulley holder, coat outer edge of seal with grease. 4. Press the top seal, 1, into the pulley holder, 2, making sure it is flush with the top of the pulley holder.
Page 304 14 - SXM54/SXM60 MID MOUNT MOWER 4. INSTALLATION OF GEARBOX, BLADE SPINDLES AND PULLEY HOLDERS NOTE: The R.H. and L.H. blade shafts and pulley holders are different. The R.H. blade shaft, doesn't have a grease fitting and hole, while the L.H blade shaft does. The R.H. pulley holder, has a grease fitting and hole while the L.H. pulley holder doesn't.
Page 305 14 - SXM54/SXM60 MID MOUNT MOWER 3. Place center pulley holder, 5, and shims, 6, (if equipped) in position from underside of mower deck. Fasten with bolts, 4. Torque bolts, 4, to 90 N･m. NOTE: Bolts, 4, are M12 x 1.25 x 30mm (fine threads).
Page 306 14 - SXM54/SXM60 MID MOUNT MOWER 7. Route the belt around the pulleys as shown. 8. Using a large pair of pliers, 1, rotate the idler pulley arm, increasing tension on the belt. IMPORTANT: Use a second person to help install belt.
Page 307 14 - SXM54/SXM60 MID MOUNT MOWER 10. Install blade boss, 7, and retaining ring, 6. 11. Install cover, 5, center blade, 4, blade retainers, 3, joint, 2, and bolt, 1. 12. Repeat steps 11 and 12 for remaining blade assemblies. 13.
Page 308 14 - SXM54/SXM60 MID MOUNT MOWER 15. Connect the drive shaft, 4, to the gearbox, 5. Insert pin, 3, washer, 2, and cotter pin, 1, to secure the driveline. 16. Install the left and right side belt covers, 1 5. INSTALLATION OF MOWER DECK ONTO TRACTOR CAUTION: When rolling the mower deck under the tractor, be...
Page 309 14 - SXM54/SXM60 MID MOUNT MOWER 2. Place the mower height adjustment lever, 1, in the 1" cutting height position. Start the engine on the tractor. Shift the 3 PT lever, 2, to the "lower" position. Turn the engine Off. Connect the front linkage, 1, to the mower deck using the spring-loaded handle, 2.
Page 310 14 - SXM54/SXM60 MID MOUNT MOWER 11. Remove the PTO cap from the PTO shaft. 12. Pull the drive shaft locking collar, 1, towards the front of the tractor and slide the drive shaft, 2, onto the PTO shaft, 3. 13.
Page 311 14 - SXM54/SXM60 MID MOUNT MOWER 14. Start the engine on the tractor and place the 3 PT hitch control lever, 2, in the "raise" position. 15. Place the height control lever, 1, in the "LOCK" position. 16. Stop the engine on the tractor. 17.
Page 312 60 mm 28.5 mm 133 mm SPECIFICATIONS 7. SXM54(54”) and SXM60(60”) Side Discharge Mower Decks SPECIFICATIONS SMX54 SMX60 Tractor Required SX21/24 SX21/24 Cutting Width (Actual) 1372 mm 1524 mm Overall Width 1720 mm 1870 mm Cutting Height (7 positions) 1”, 1.5”, 2”, 2.5”, 3”, 3.5”, 4”...
Page 313 14 - SXM54/SXM60 MID MOUNT MOWER 8. LUBRICATION Before operating the SXM54 or SXM60 mower, make REF. NO. DESCRIPTION 25 HRS. sure all indicated lubrication points have been properly lubricated according to the diagram. Blade Spindle (3) ● Always wipe the fitting to be lubricated with a clean Idler Pulley Shaft (1) ●...
Page 314 14 - SXM54/SXM60 MID MOUNT MOWER Adjustment 1. Loosen the locknut, 1, on the mower lift rod, 2. 2. Start the engine and move the HPL control lever, 3, to the "raise" position. 3. Stop the engine. 4. Move the cutting height control lever, 4, to the "lock" (full rearward) position.

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