Disassembly Procedure
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Table 1
| Required Tools |
| Tool |
Part Number |
Part Description |
Qty |
| (A) |
1P-1862 |
Snap Ring Pliers |
1 |
| (B) |
1P-1861 |
Snap Ring Pliers |
1 |
Start By:
- Remove the main hydraulic pump. Refer to Disassembly and Assembly, "Main Hydraulic Pump- Remove" in this manual.
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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 the pump and on all lines for installation purposes. Plug all lines. This will help to prevent fluid loss and this helps to keep contaminants from entering the system.
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
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| Illustration 1 | g00760479 |
- Remove two socket head bolts (1). Remove the gear pump.
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| Illustration 2 | g00762869 |
- Remove coupling (2). Remove four socket head bolts (3). Remove head (4) .
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| Illustration 3 | g00760750 |
- Remove port plate (5). Remove four O-ring seals (6) and O-ring seal (7). Remove two socket head screws (8). Remove piston block (9) .
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| Illustration 4 | g00760612 |
- Remove O-ring seals (10) .
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| Illustration 5 | g00760615 |
- Remove pistons (11) .
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| Illustration 6 | g00760620 |
- Remove valve (12) and shims (13) .
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| Illustration 7 | g00762754 |
Note: If it is necessary to remove nut (14) and set screw (15), measure the distance from the top of nut (14) to the top of set screw (15). Use this measurement for assembly purposes.
- Remove two socket head bolts (16). Remove cover (17) .
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| Illustration 8 | g00762769 |
- Remove piston (18) .
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| Illustration 9 | g00760686 |
- Remove shims (19), and O-ring seal (20) from piston (18) .
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| Illustration 10 | g00762834 |
- Remove three socket head bolts (21). Remove cover (22) .
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| Illustration 11 | g00760724 |
- Remove plate (25), and seal (24) from cover (22) .
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| Illustration 12 | g00762740 |
- If necessary, remove two plugs (23) and the O-ring seals. Remove gear (26) and gear (27) .
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| Illustration 13 | g00760727 |
- Remove bearing (28) .
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| Illustration 14 | g00760976 |
- Remove spring (29), spring (30) and spring retainer (31) from housing (32) .
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| Illustration 15 | g00760784 |
- Remove rotating group (33) .
Note: Mark the position of all the pistons as you take the pistons from the cylinder. The pistons must go back into the same position in the cylinder.
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| Illustration 16 | g00761264 |
- Remove ten pistons (34) .
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| Illustration 17 | g00761262 |
- Remove retainer plate (35), and collar (36). Remove three pins (37) .
Note: The barrel assembly is under spring pressure.
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Sudden release of spring force can cause injury. To prevent the possibility of injury, follow the procedure to relieve the spring pressure. |
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| Illustration 18 | g00761148 |
- Use Tooling (A) and a suitable press in order to remove retaining ring (38) .
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| Illustration 19 | g00761174 |
- Remove washers (40), and spring (41) from barrel (39) .
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| Illustration 20 | g00761415 |
- Use Tooling (B) in order to remove retaining ring (42) .
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| Illustration 21 | g00761183 |
- Remove cover (43) and O-ring seal (44). Remove shaft assembly (45) .
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| Illustration 22 | g00760972 |
- Remove retaining rings (46). Remove bearing (47) .
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| Illustration 23 | g00761389 |
- Remove lip seal (48) .
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| Illustration 24 | g00761395 |
- Remove four socket head bolts (49). Remove cover (50) .
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| Illustration 25 | g00761407 |
- Remove O-ring seal (51) .
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| Illustration 26 | g00761409 |
- Remove spacer (52), race (53), and bearing (54) .
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| Illustration 27 | g00761744 |
- Remove swashplate (55) .
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| Illustration 28 | g00761748 |
- Remove bearing (56) .
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| Illustration 29 | g00761758 |
- Remove race (57) .
