All Manuals Close Window

Service Transmission

Hydrostatic Transmission Oil


NOTE: Transaxle is filled with John Deere HY-Gard® (J20C) transmission oil at the factory. DO NOT mix oils.

Use only HY-GARD® (J20C) transmission oil.

Do not use type “F” automatic transmission fluid.

John Deere HY-GARD® (J20C) transmission oil is specially formulated to provide maximum protection against mechanical wear, corrosion and foaming.

IMPORTANT: Avoid damage! If operating temperatures are below - 18?C (0?F), you must use Low Viscosity HY-Gard® (J20D) or transmission damage will occur.

Cleaning Hydraulic Oil Cooler

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).

IMPORTANT: Avoid damage! To ensure proper cooling, keep the cooling fins clean at all times. Operating the machine with obstructed cooling fins could cause damage due to overheating.

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

2. Open hood.


3. Clean hydraulic cooler(A) with a rag, brush, or compressed air.

4. Close hood.

Checking Hydraulic Oil Level

IMPORTANT: Avoid damage! Stop engine first.

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

2. Open hood.


3. Unscrew tank cap (A).

4. Check oil at dipstick (B).


5. Oil level should be between minimum (C) and maximum indicators (D).

6. If necessary, add oil.

7. Fit tank cap. Lower hood.

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.

IMPORTANT: Avoid damage! Contamination of hydraulic fluid could cause transmission damage or failure. Do not open oil reservoir cap unless absolutely necessary.

Severe or unusual conditions may require a more frequent service interval.

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

2. Allow engine and hydraulic oil reservoir to cool.

3. Open hood.


Picture Note: Parts have been removed for photo clarity.

4. Put a container under hydraulic oil filter (A).

5. Turn hydraulic oil filter four turns counterclockwise to drain oil from tank.


Picture Note: Bottom of hydraulic pump shown

6. Put a container under drain plug (B).

7. Remove drain plug.

8. Remove old filter.

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

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

11. Install drain plug.


12. Clean area around reservoir fill cap (C).

13. Remove cap.

14. Fill oil reservoir with approximately 19 L (5 gal) of oil.

15. Install cap.

16. Start engine.

17. Move throttle lever to the slow position.

18. Run machine in idle position for 3 minutes.

19. Unlock park brake.

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

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

21. Stop the engine. Check oil level. Add oil if necessary.

22. Close hood.

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.

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.

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

2. Start engine.

3. Set throttle lever to the fast position.

4. Unlock park brake.

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

Adjusting Motion Control Linkages

1. Stop engine and lock park brake.

2. Lift drive wheels off the ground using a safe lifting device.


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

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

NOTE: To avoid damaging the seat cushion, cover end of wood block with a rag.


5. Place a wooden block (B) approximately 33-38 cm (13-14 in.) long between the foot plate and the center of the seat.

6. Start engine.

7. Set throttle to the fast position.

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

8. Unlock park brake.


9. Locate left (D) and right (E) motion control linkages.

10. 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:

a. Loosen jam nuts (F) on each end of the linkage.

b. Adjust linkage until the wheel stops rotating completely.

c. Tighten jam nuts.

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


• Loosen nut (H).

• Move the right motion control lever to the neutral position.

• Adjust bolt in slot.

• Tighten nut to 20 N•m (15 ft-lb).

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

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

13. Repeat procedure to adjust the left motion control linkage (G).

• Drive wheels do not rotate when in neutral lock position or when motion control levers return to neutral position in slot.

14. Stop engine.

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

16. Remove by-pass from wiring harness and reconnect machine harness to seat switch harness. Make sure harnesses do not obstruct seat base when adjusting seat.

17. Lower machine.

18. Lower seat.