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 work tools have been lowered to the ground, and the 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. |
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To prevent personal injury when checks are made while the machine is in operation, make sure only approved personnel are on the machine. Keep other personnel off the machine and in view of the operator. Make sure checks are done in an open area. |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Make sure that the machine is resting on a smooth, level surface. The machine should be moved away from other operating machines and away from personnel.
- Permit only one operator on the machine. Keep other personnel away from the machine or in the operator's sight.
- Fully extend the stick cylinder rod.
- Lower the boom until the felling head is resting on the ground.
- Stop the engine.
- Cycle all control levers through the full range of motion. This will release any pressure that might be present in the pilot system.
- Move the hydraulic activation control lever to the LOCKED position.
Note: When the hydraulic activation control lever is in the LOCKED position no implements will function.
- Push down on the hydraulic tank breaker relief valve until all pressure is released.
Note: The hydraulic tank filler cap may be removed in order to relieve tank pressure.