Pilot Operated Hydraulic Control - Remove
Removal Procedure
Start By:
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
- Raise the cab. Refer to Disassembly and Assembly, "Cab - Tilt".
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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. |
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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. |
Note: Put identification marks on all lines and on all wires for installation purposes. Plug all lines. This will help to prevent fluid loss and this helps to keep contaminants from entering the system.
- Remove four screws (1) and cover (2) .
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| Illustration 1 | g00774731 |
- Disconnect three electrical connectors (3), (4) and (5) .
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| Illustration 2 | g00774788 |
- Disconnect six hydraulic lines (6), (7), (8), (9), (10) and (11) .
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| Illustration 3 | g00774792 |
Note: These lines must be marked prior to removal.
- Remove strap (12) and lift up boot (13) .
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| Illustration 4 | g00774799 |
- Remove three allen head screws and the washers (14).
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| Illustration 5 | g00774811 |
- Remove four bolts and the washers (15) from the side of the machine. Bolts (15) secure a portion of the support assembly.
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| Illustration 6 | g00774817 |
- Remove two bolts (16) from bracket (17). Bolts (16) secure bracket (17) to the support assembly. Remove bracket (17) .
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| Illustration 7 | g00774819 |
- Remove pilot operated hydraulic control (18) .
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| Illustration 8 | g00774821 |
- Repeat Steps 1 through 8 for the opposite side of the machine.
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