Removal Procedure
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 5P-0306 | Vacuum Transducer | 1 |
| FT-1115 | Vacuum Cap | 1 | |
| 6V-4142 | Fitting | 1 | |
| 5K-5068 | Fitting | 1 | |
Start By:
- Remove the fuel tank. Refer to Disassembly and Assembly, "Fuel Tank - Remove".
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
| NOTICE |
|---|
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. |
| NOTICE |
|---|
Keep all parts clean from contaminants. Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components. To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly. Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination. |
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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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- Open the access door to the main control valve. Turn the main control valve (1) to the OFF position.
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| Illustration 1 | g01176704 |
- Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.
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| Illustration 2 | g00944947 |
- Remove cover (2) .
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| Illustration 3 | g01176706 |
- Remove bolts (3) .
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| Illustration 4 | g01176708 |
- Disconnect hose assemblies (4) .
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| Illustration 5 | g01176820 |
- Disconnect harness assembly (5) .
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| Illustration 6 | g01176821 |
- Remove bolts (6) and valve assembly (7) .
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| Illustration 7 | g01176822 |
- Remove relief valve assembly (8) and block (9) .
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| Illustration 8 | g01182970 |
- Remove O-ring seals (10) from relief valve assembly (8) .
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| Illustration 9 | g01182971 |