385B Excavator Hydraulic System Oil Level - Check Caterpillar


Hydraulic System Oil Level - Check
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NOTICE

Never remove the fill/vent plug from the hydraulic tank if the oil is hot.

Air can enter the system and cause pump damage.




Illustration 1g00101435
The hydraulic oil tank is on the right side of the machine.

  1. Park the machine on level ground. Place the machine in the servicing position.


    Illustration 2g00808061
    (A) High temperature range
    (B) Low temperature range

  2. For a cold machine, maintain the hydraulic oil level in the low temperature range. For a machine that is at normal operating temperature, maintain the hydraulic oil level in the high temperature range.


    Illustration 3g00837304

    Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.

  3. Slowly loosen the fill/vent plug in order to relieve any pressure. Add oil, if necessary.

  4. Check the O-ring seal of the fill/vent plug. Replace the O-ring seal if the O-ring seal is damaged.

  5. Clean the fill/vent plug and install the fill/vent plug.

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