Start By:
- Release the system pressure.
Note: The hydraulic accumulator is installed under the main control valve.
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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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
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Personal injury can result from the sudden release of high pressure oil. Be sure the engine has been shut off for a minimum of five minutes to ensure that the accumulator pressure is zero. The accumulator is filled with dry nitrogen. Do not loosen or remove the valve or the cap from the top of the accumulator. |
- Remove bolts (1) and plate (2).
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Illustration 2 g06309565 Note: Do not release the nitrogen from the hydraulic accumulator unless the unit will be disassembled.
- Remove hydraulic accumulator (3) by turning the nut that is at the top of the accumulator. Remove the O-ring seal from accumulator (3).
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| Illustration 1 | g06309564 |
- Replace the O-ring seal with a new O-ring seal. Install the O-ring seal in accumulator (3).
- Install accumulator (3) by tightening the nut that is at the top of the accumulator. Refer to Testing and Adjusting, "Accumulator (Pilot) - Test and Charge" if the accumulator requires charging.
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Illustration 4 g06309564 - Install plate (2) and bolts (1).
- Check the hydraulic oil level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
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| Illustration 3 | g06309565 |