Removal Procedure
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Table 1
| Required Tools |
| Tool |
Part Number |
Part Description |
Qty |
| A |
159-3327 |
Hex wrench |
1 |
| B |
1U-7600 |
Puller |
1 |
Start By:
- Release the pressure in the hydraulic system. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
- Remove the hydraulic tank. Refer to Disassembly and Assembly, RENR4812, "Hydraulic Tank - Remove".
- Remove the gear pump. Refer to Disassembly and Assembly, RENR4812, "Gear Pump - Remove".
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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. |
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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.
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| Illustration 1 | g00771455 |
- Disconnect hoses (1), (2) and (3) from the right side of the piston pump.
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| Illustration 2 | g00771467 |
- Disconnect hoses (4) and (5) from the right side of the piston pump.
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| Illustration 3 | g00771469 |
- Disconnect hoses (6), (7), (8) and (9) from the left side of the piston pump.
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| Illustration 4 | g00771484 |
- Disconnect hoses (10), (11), (12) and (13) from the left side of the piston pump.
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| Illustration 5 | g00771489 |
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| Illustration 6 | g00784268 |
- Use Tooling (A) to remove two bolts (14) and the washers that secure the piston pump to the pump mount.
- Attach a suitable lifting device for support and removal of the piston pump. Weight of the piston pump is 57 kg (125 lb).
- Slide the piston pump toward the front of the machine for removal.
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| Illustration 7 | g00771496 |
- Loosen allen head screw (15) .
- Remove coupling hub (16) from the spline of the piston pump.
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| Illustration 8 | g00795865 |
- Remove snap ring (17) .
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| Illustration 9 | g00795868 |
- Use tooling (B) to remove shaft seal (18) .
