Service Hydraulics

Hydraulics and Hydraulic Oil

Use oil viscosity based on the expected air temperature range during the period between oil changes.

MIF

A sufficient quality and quantity of hydraulic oil is essential for full lift cylinder action, drive/steering action, and protection against severe damage to hydrostatic pumps, charge pump, control valve, and hydraulic pump motors.

The following hydraulic oils are preferred:

· John Deere HY-GARD

· John Deere low viscosity HY-GARD (cold weather operation only)

Checking Hydraulic Reservoir Oil Level


IMPORTANT: Avoid damage! To ensure an accurate reading, park skid steer on smooth level ground and check level only when the hydraulic oil is cold and the boom is down with the boom and bucket cylinders fully retracted. When adding oil to the reservoir, be careful not to get dirt into reservoir or oil. Do not overfill the hydraulic oil reservoir. An overfilled hydraulic reservoir will not allow for oil expansion, which may result in oil leakage past the hydraulic tank breather or fill cap.

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

KV1148

2. Locate sight plug (A) on the left rear side of the frame.

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3. The float ball (B) and visible hydraulic oil should be at approximately the midpoint of the sight glass.

NOTE: Add approximately 1.9 L (2 qt) if the hydraulic oil is just visible at the bottom of the sight glass.

4. Add oil if necessary:

· Open engine cover and remove left side panel.

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· Clean any dirt and debris from area around the reservoir cap (C).

· Remove cap and fill reservoir with John Deere HYGARD or low viscosity HY-GARD oil.

· As oil is added, monitor the position of the float ball. The oil level is adequate for machine operation when the float ball reaches the midpoint of the sight glass.

· Install cap.

5. Install side panel and close engine cover and rear service door.

Changing Hydraulic Oil Filter

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

2. Raise ROPS and assure ROPS is safely in the locked position.

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3. Turn filter (A) counterclockwise with a filter wrench to remove.

4. Put a film of clean hydraulic oil on seal of new filter.

5. Install the filter until it contacts the mounting surface. Tighten filter by hand 2/3 to 1 turn more.

6. Lower ROPS.

Changing Hydraulic Oil

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

2. Open engine cover and remove left side panel.

3. Remove hydraulic oil reservoir cap.

4. Remove skid plate.

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Picture Note: Bottom view.

5. Position a suitable container under the hydraulic drain plugs (A).

6. Remove hydraulic reservoir drain plug (A), located under the skid steer, and drain fluid.

7. Dispose of oil properly.

8. Install drain plugs (A).

9. Fill reservoir, through hydraulic oil dipstick tube, with John Deere HY-GARD or low viscosity HY-GARD (cold weather operation only) oil. Reservoir capacity is 32.2 L (8.5 gal).

10. Check reservoir oil level.

11. Inspect drain plug for leakage.

12. Install skid plate.

13. Install hydraulic oil reservoir cap.

14. Close engine cover and rear service door.

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