Changing Hydraulic Oil and Filter

CAUTION: 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: 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 hydraulic oil reservoir to cool.

  3. Lift the thigh pad.

  4. NOTE: Place drain pan directly under filter head.

    TCAL43660
    TCAL43660-UN-26MAR13

    Loosen hose connection (A), and disconnect filter inlet line (B).


  5. Allow hydraulic oil to drain into a drain pan with a capacity of at approximately 2.8 L (3 qt.).

  6. Turn oil filter (C) counterclockwise to remove.

  7. Apply a film of clean hydraulic oil to gasket of new filter.

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

  9. Connect filter inlet line (B), and secure connection (A).

  10. Clean area around breather cap (D).

  11. IMPORTANT: Do not add oil beyond FULL mark. Oil capacity after draining may be less than dry fill capacity. Check oil level before filling completely.

    TCAL43661
    TCAL43661-UN-26MAR13

    Remove breather cap (D) and fill oil reservoir to the correct level (E), approximately 2.7 L (2.9 qt.). of oil. Install socket head plug.


  12. Before starting engine bleed the hydraulic system. See (Bleeding Air From Hydraulic System).

  13. When the hydraulic system is free of all air, start engine.

  14. Move throttle lever to the FAST position.

  15. Unlock park brake.

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

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

  17. Stop engine. Check oil level, and add oil as necessary to bring oil level to FULL mark (F) on the reservoir sight glass (E).

  18. Lower thigh pad.

BB87125,0001472-19-20130708