Removal 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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| 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, on all hoses, on all wires and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
Note: Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
- Release the pressure in the hydraulic system. Refer to Disassembly and Assembly Manual, "System Pressure - Release".
- Open the engine hood. Refer to Operation and Maintenance Manual, "Hood Tilt".
- Remove hoses (1) and (2) .
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| Illustration 1 | g00809744 |
- Remove six hoses (3) from the top of the main control valve. Remove the same hoses from the bottom of the main control valve.
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| Illustration 2 | g00812053 |
- Remove the bolts and six hoses (4) .
- Remove four bolts (6) from each of four lines (5) .
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| Illustration 3 | g00829803 |
- Remove the four bolts and tube (7) .
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| Illustration 4 | g00829806 |
- Remove four bolts (8) in order to disconnect the block and the remaining tube.
- Remove the four bolts and tube (8) .
- Remove the four bolts and tube (9) .
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| Illustration 5 | g00829805 |
- Remove the four bolts and tube (10) .
- Remove tubes (11) and (12) .
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| Illustration 6 | g00812133 |
- Attach a hoist and a suitable lifting device to the main control valve. The weight of the main control valve is 691 kg (1525 lb).
- Remove four mounting bolts (13) .
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| Illustration 7 | g00811964 |
- Remove the main control valve.