Changing Transmission Oil and Filters

Escaping fluid under high pressure can penetrate the skin and cause serious injury. Avoid the hazard by relieving pressure before connecting 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.

• If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A. In the United States and Canada only, this information may be obtained by calling 1-800-822-8262.

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. (See Parking Safely in the SAFETY section.)

2. Allow engine and transmission oil reservoir to cool.

3. Place drain pan under both transmissions.

Z900E and Z900M Series

Do not use chlorinated solvents or high pressure water to clean grass and debris from filter caps.

1. 
   TCAL43540-UN-21MAR13

   Clean area around each filter cap (A).

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2. Remove filter cap (A) and filter from each transmission. Discard filters.

3. Allow transmission oil to drain into a drain pan.

4. Apply a film of clean oil on gasket of each new transmission filter.

5. 
   TCAL43541-UN-21MAR13

   Install new filter into each transmission, with spring end (B) facing filter cap (C).

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6. Replace O-ring (D) on the filter cap.

7. Install filter cap (removed earlier) and tighten to specification.

   Filter Cap	Torque	7.3 - 12.3 N·m (5.4 - 9 lb-ft)

8. Use a safe lifting device to raise the drive wheel off the ground. Support with jackstands.

9. Lift operator seat and lock into position.

10. Fill reservoir until oil level is between MIN and MAX marks on reservoir.

11. On both transmissions, pull the bypass levers back to the open position.

12. Rotate each drive tire by hand 1 full revolution forward and backward.

13. Check and fill reservoir until oil level is between MIN and MAX marks on reservoir.

14. Lower seat.

15. Start engine.

16. Allow engine to idle for 1 minute at low idle.

17. Push both motion control levers to full forward and hold for 5 seconds. Pull both control levers to full reverse and hold for 5 seconds. Repeat two additional times.

18. Stop the engine.

19. Push the bypass levers forward to the closed position.

20. Use a safe lifting device to raise the drive wheels off the ground. Remove the jackstands.

21. Help prevent serious bodily injury. Remain alert to other people and the surroundings when operating the machine.

    Start the engine.

22. Move throttle lever to the 3/4 fast idle position.

23. Unlock park brake.

24. Run engine in full throttle for 5 minutes and then cycle motion control levers forward and rearward several times. Check for leaks around filters.

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

Z900R Series

Do not use chlorinated solvents or high pressure water to clean grass and debris from filter caps and hydraulic filter base.

1. 
   TCAL43542-UN-21MAR13

   Clean area around each filter cap (A) and hydraulic filter (B) base.

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2. Remove filter cap (A) and filter from each transmission. Discard filters.

3. Remove inline hydraulic filter (B) from filter base.

4. Allow transmission oil to drain into a drain pan.

5. Apply a film of clean oil on gasket of new inline hydraulic filter and tighten onto filter base.

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

7. 
   TCAL43543-UN-21MAR13

   Install new filter into each transmission, with spring end (C) facing filter cap (D).

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8. Replace O-ring (E) on the filter cap.

9. Install filter cap (removed earlier) and tighten to specification.

   Filter Cap	Torque	7.3 - 12.3 N·m (5.4 - 9 lb-ft)

10. Use a safe lifting device to raise the drive wheel off the ground. Support with jackstands.

11. Lift operator seat and lock into position.

12. Fill reservoir until oil level is between MIN and MAX marks on reservoir.

13. On both transmissions, pull the bypass levers back to the open position.

14. Rotate each drive tire by hand 1 full revolution forward and backward.

15. Check and fill reservoir until oil level is between MIN and MAX marks on reservoir.

16. Lower seat.

17. Start engine.

18. Allow engine to idle for 1 minute at low idle.

19. Push both motion control levers to full forward and hold for 5 seconds. Pull both control levers to full reverse and hold for 5 seconds. Repeat two additional times.

20. Stop the engine.

21. Push the bypass levers forward to the closed position.

22. Use a safe lifting device to raise the drive wheels off the ground. Remove the jackstands.

23. Help prevent serious bodily injury. Remain alert to other people and the surroundings when operating the machine.

    Start the engine.

24. Move throttle lever to the 3/4 fast idle position.

25. Unlock park brake.

26. Run engine in full throttle for 5 minutes and then cycle motion control levers forward and rearward several times. Check for leaks around filters.

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