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.

  4. TC100821
    TC100821-UN-07MAR19

    Unscrew transmission oil filter cover (A) by removing two hex head bolts (B).


  5. TCT016776
    TCT016776-UN-14SEP18

    Loosen breather bolts (C) on both transmissions.


  6. Clean area around filter.

  7. Remove filter from each transmission. Discard filters.

  8. Allow transmission oil to drain into drain pan.

  9. Install new filter.

  10. Install oil filter cover.

  11. Use a safe lifting device to raise the drive wheel off the ground. Support with jack stands.

  12. APY08968
    APY08968-UN-25JUL18

    Fill reservoir between MIN and MAX cold fill line.


  13. Tighten breather bolts to 20 N·m (15 lb·ft)

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

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

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

  17. Lower seat.

  18. Start engine.

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

  20. 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.

  21. Stop the engine.

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

  23. Use a safe lifting device to raise the drive wheels off the ground. Remove the jack stands.

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).

SR99263,000004E-19-20190306