Service Transmission

Hydrostatic Transmission and Hydraulic Oil

Use the following oil viscosity based on the air temperature range. Operating outside of the recommended oil air temperature range may cause premature hydrostatic transmission failure.

The following oil is preferred:

• JD Plus 50 15W-40

The following oil is also recommended:

• SAE 15W-40

The following oil is allowable:

• JD Plus 50 0W-40 Synthetic

Oil must meet the following:

• API Service Classification SG or higher

Cleaning Hydraulic Pump Cooling Fins

c CAUTION: Avoid injury! Compressed air can cause debris to fly a long distance. • Clear work area of bystanders. • Wear eye protection when using compressed air for cleaning purposes. • Reduce compressed air pressure to 210 kPa (30 psi).

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Lift and secure operator seat in the raised position.

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3. Remove fan guard cover (A) to access fan. Clean hydraulic pump cooling fins and fan (B) with a rag, brush, or compressed air.

4. Lower seat.

5. Ensure seat latch is engaged.

Checking Hydraulic Oil Level

NOTE: Do not overfill oil reservoir tank. Oil will expand during operation and could overflow.

1. Park machine safely. (Refer to Parking Safely in Safety section.)

2. Lift and secure operator seat in the raised position.

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3. Thoroughly clean area around reservoir fill cap (A).

4. Visually check level of fluid. Fluid level should be even with the fill line (B) on the side of the tank.

5. To add oil, remove cap from the oil reservoir tank filler neck.

6. Install cap on filler neck.

7. Lower operator seat.

Changing Hydraulic Oil and Filter

c CAUTION: Avoid injury! Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids. Use caution when filling and draining hydraulic oil. During periods of machine operation the hydraulic oil reservoir can get hot. Allow engine and oil reservoir to cool before servicing.

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Allow engine and hydraulic oil reservoir to cool.

3. Lift and secure operator seat in the raised position.

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4. Turn transmission oil filter (A) counterclockwise to remove.

5. Allow transmission oil to drain into a drain pan with at least a 9.5 L (2.5 gal) capacity.

6. Apply a film of clean oil on gasket of new filter.

7. Install filter. Turn filter clockwise until gasket makes contact with the mounting surface. Tighten 1/2 to 3/4 turn after gasket contact.

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8. Clean area around reservoir fill cap (B).

9. Remove cap from the oil reservoir tank filler neck.

10. Fill oil reservoir with approximately 7.6 L (2 gal) of oil.

11. Start engine.

12. Move throttle lever to the fast position.

13. Unlock park brake.

c CAUTION: Avoid injury! Help prevent serious bodily injury. Remain alert to other people and the surroundings when operating the machine.

14. Cycle motion control levers forward and rearward several times. Check for leaks around filter.

15. Stop the engine. Check oil level. Add oil as necessary.

16. Lower operator seat.

Checking and Replacing Pump Drive Belt

c CAUTION: Avoid injury! Entanglement in a belt or sheave can cause serious injury. Stop engine and wait for all moving parts to stop.

NOTE: The transmission drive belt will not require a tension adjustment. Belt is self-adjusted using a spring tensioner.

Checking Belt

1. Stop engine and lock park brake.

2. Lift and secure operator seat in the raised position.

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3. Inspect belt (A) for excessive wear, damage or stretching while in position on the transmission sheaves and drive belt tensioner sheave.

Replacing Belt

1. Place a 1/2-inch breaker bar into square hole (B) of idler bracket (C). Rotate idler bracket to remove tension from drive belt.

2. Remove belt from drive sheaves and idler sheave.

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3. Install belt onto drive sheaves and idler sheave as shown.

NOTE: Idler tension requires no adjustment.

4. Lower operator seat.

Checking and Adjusting Motion Control Linkages

c CAUTION: Avoid injury! Do not attempt this adjustment unless you are a qualified and properly trained technician. Improper adjustment can result in an unsafe machine.

Checking Motion Control Linkages

NOTE: Check and adjust motion control linkages with the machine parked on a hard, level surface.

1. Raise rear of machine with a safe lifting device.

• Support with wood blocks or jackstands.

• Rear drive wheels must have the ability to rotate freely.

c CAUTION: Avoid injury! Engine exhaust fumes contain carbon monoxide and can cause serious illness or death. Move the machine to an outside area before running the engine. Do not run an engine in an enclosed area without adequate ventilation. • Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area. • Allow fresh outside air into the work area to clear the exhaust fumes out.

2. Sit on operator’s seat and place both motion control levers in the neutral lock position.

3. Start engine.

4. Set throttle lever to the fast position.

5. Unlock park brake.

6. If the rear drive wheels begin to creep, an adjustment is required.

Adjusting Motion Control Linkages

1. Stop engine and lock park brake.

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2. Move both motion control levers (A) to the neutral lock position.

3. Lift and secure operator seat in the raised position.

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4. Activate operator seat safety switch (B).

• Clamp a wooden block to machine frame and across seat switch to activate seat switch.

5. Start engine.

6. Set throttle to the fast idle position.

c CAUTION: Avoid injury! Prevent entanglement when performing this service procedure by keeping hands, feet and clothing away from rotating tires.

7. Unlock park brake.

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8. Locate left and right motion control linkages (C).

9. Be sure the right motion control lever is in the neutral lock position.

• The right drive wheel must not turn. If it does turn, adjust the motion control linkage:

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a. Loosen hex nuts (D and E) on each end of the center link (F).

b. Adjust center link (F) until the wheel stops rotating completely.

c. Tighten hex nuts.

10. Move the right motion control lever completely rearward in the slot and release lever. The lever should return back to the neutral position (completely centered in the slot).

• The drive wheels must stop completely. If the drive wheel does not completely stop rotating, a damper mount adjustment is necessary:

• Adjust damper in slot as necessary; tighten nut to 20 N•m (15 ft-lb).

11. Move the right motion control lever completely forward and rearward in the slot and then back to the neutral lock position.

• The drive wheels must stop completely. If the drive wheel does not completely stop rotating, repeat steps 9 and 10.

12. Repeat procedure to adjust the left motion control linkage. Loosen jam nuts on both ends of linkage and turn linkage to adjust.

13. Stop engine.

14. Move both motion control levers to the neutral lock position.

15. Remove wooden block that is activating seat switch.

16. Lower machine.

17. Lower seat.