Removal Procedure
Start By:
- Install the steering frame lock. Refer to Disassembly and Assembly, "Steering Frame Lock - Remove and Install".
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "System Pressure - Release".
Note: Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help prevent dirt from entering the internal mechanism.
Note: Put identification marks on all hoses, on all hose assemblies on all wires, and on all tube assemblies for installation purposes. Plug all hose assemblies and plug all tube assemblies. This helps prevent fluid loss, and this helps keep contaminants from entering the system.
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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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
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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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| Illustration 1 | g01280486 |
- Remove four bolts (1) and the nuts from pressurizer assembly (2) .
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| Illustration 2 | g01280488 |
- Disconnect electrical connector (3) .
- Remove pressurizer assembly (2) .
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| Illustration 3 | g01280489 |
- Remove covers (4) and (5) .
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| Illustration 4 | g01278602 |
- Disconnect seven electrical connectors (6) .
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| Illustration 5 | g01278607 |
- Remove two bolts (7) and bracket (8). Move bracket (8) out of the way.
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| Illustration 6 | g01278608 |
- Disconnect five hose assemblies (9) .
- Remove two bolts (10) and parking brake control valve (11) .
Installation Procedure
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| Illustration 7 | g01278608 |
- Install parking brake control valve (11) and two bolts (10) .
- Connect five hose assemblies (9) .
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| Illustration 8 | g01278607 |
- Install bracket (8) and two bolts (7) .
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| Illustration 9 | g01278602 |
- Connect seven electrical connectors (6) .
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| Illustration 10 | g01280489 |
- Install covers (5) and (4) .
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| Illustration 11 | g01280491 |
- Connect electrical connector (3) .
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| Illustration 12 | g01280486 |
- Install pressurizer assembly (1), four bolts (2) and the nuts.
- Purge the air from the parking brake. Refer to Systems Operation, Testing and Adjusting, Braking System, "Braking System Air - Purge".
- Fill the hydraulic tank with oil to the correct level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
End By:
Remove the steering frame lock. Refer to Disassembly and Assembly, "Steering Frame Lock - Remove and Install".
