904B Wheel LoaderPower Train Caterpillar

Release Procedure

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

1. Lower the implements to the ground.

2. Shut off the engine.

3. Move the control levers through the full range of travel. This will relieve any pressure that may be present in the implement hydraulic system.

4. Depress the brake pedal repeatedly. This will relieve any pressure that may be present in the brake hydraulic system.

5. Slowly loosen the filler cap in order to release the tank pressure.

6. Tighten the filler cap.

7. The pressure in the hydraulic system has been released. Lines and components can be removed.