Changing Hydraulic Oil and Filter

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.

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 to Parking Safely in the Safety section.)

  2. Allow engine and hydraulic oil reservoir to cool.

  3. Lift thigh pad.

  4. Place drain pan directly under filter head.

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    Turn oil filter (A) counterclockwise to remove.


  5. Allow hydraulic oil to drain into drain pan.

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

  7. Install new filter. Turn filter clockwise until the housing touches the metal edge of the filter to avoid leaking.

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    Clean area around breather cap (B).


  9. The oil level should not be below the sight glass and not more than 1/2 in. above the top of the sight glass.

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    Remove breather cap (B) and fill oil reservoir to the correct level (F), approximately 1.9 L (2.0 qt) of oil. Install breather cap.


  10. Before starting engine bleed the hydraulic system. See Bleeding Air From Hydraulic System.

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

  12. Move throttle lever to the fast position.

  13. Unlock park brake.

  14. 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.

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

  16. Lower thigh pad.

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