| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 1P-1862 | Pliers | 1 |
| B | 1P-1861 | Retaining Ring Pliers | 1 |
| C | 147-3497 | Spring Compressor | 1 |
| D | 1U-7600 | Slide Hammer Puller Gp | 1 |
Start By:
- Remove the piston pump.
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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. |
| 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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
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.
- Remove bolts (2), cover (3), and the gasket.
- Remove bolts (3B) and servo valve (2B).
- Remove bolts (1), solenoids (1A), the O-ring seals, and the bevel washers.
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Illustration 2 g01284508 - Remove bolts (5) and O-ring seal (6A) from flange (6).
- Remove flange (6) from housing (4).
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Illustration 3 g01284387 - Remove bolts (8) and O-ring seal (9A) from head (7).
- Remove head (7) from the housing.
- Remove coupler (9).
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Illustration 4 g00875055 Note: Mark the proper orientation of port plate (11) for installation purposes.
- Remove O-ring seal (10) from head (7).
- Remove port plate (11) from head (7).
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Illustration 5 g06221275 - Remove plug (12), pin (13), plug (14), and the O-ring seal from head (7).
Note: Plug (12) will need to be installed in new head (7) if head (7) is replaced.
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Illustration 6 g02994896 Show/hide tablePersonal injury can result from parts and/or covers under spring pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
- Remove O-ring seal (15) from head (7).
- Remove relief valves (16) and the O-ring seals from head (7).
- Remove test port (17) from head (7) and the O-ring seal.
- Remove compensator valve (22) and the O-ring seal from head (7).
- Remove retainer (21), spring (20), and retainer (19) from compensator valve (22).
- Remove control piston (18) from head (7).
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Illustration 7 g00875130 - Remove rotating assembly (23) from housing (4).
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Illustration 8 g00875175 Note: Mark the location of pistons (24) for assembly purposes.
- Remove pistons (24) from retainer plate (25).
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Illustration 9 g00875182 - Remove ball joint (26) from barrel assembly (27).
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Illustration 10 g00875186 - Remove spring assembly (28) and shim (29) from barrel assembly (27).
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Illustration 11 g00875193 Show/hide tablePersonal injury can result from parts and/or covers under spring pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
- Use Tooling (B) and a suitable press to remove retaining ring (30) from barrel assembly (27).
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Illustration 12 g01332818 - Remove washers (31) and spring (32) from barrel assembly (27).
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Illustration 13 g00875204 - Remove retaining ring (33) from housing (4).
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Illustration 14 g03699121 Note: Use Tooling (D) for removal of seal (34).
- Remove seal (34) from housing (4).
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Illustration 15 g03699124 - Remove retaining ring (35) from housing (4).
- Remove shaft assembly (36) from housing (4).
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Illustration 16 g00875537 - Remove swashplate assembly (38).
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Illustration 17 g00875538 - Remove slide (39), rods (40), and bearings (41).
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Illustration 18 g00875539 - Remove bearings (42).
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Illustration 19 g00875564 - Remove plug assembly (44) and joint pin (43).
- Repeat Step 31 for the opposite side.
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Illustration 20 g00875567 - Remove bolts (45) and servo valve (46).
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Illustration 21 g00875568 Show/hide tablePersonal injury can result from parts and/or covers under spring pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
- Use Tooling (A) and a suitable press to remove retaining ring (47).
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Illustration 22 g00875569 Show/hide tablePersonal injury can result from parts and/or covers under spring pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
- Use Tooling (C) and a suitable press to remove ring assembly (48).
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Illustration 23 g00875570 - Remove spring retainer (49). Remove springs (50), (51), and (52). Remove spring retainer (53).
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Illustration 24 g00875571 Note: Measure nut (54) for installation.
- Remove nut (54) and cover (55).
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Illustration 25 g00875573 - Remove O-ring seal (56) from cover (55).
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Illustration 26 g00875599 Show/hide tablePersonal injury can result from parts and/or covers under spring pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
- Use Tooling (A) and a suitable press to remove retaining ring (57).
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Illustration 27 g00875601 - Remove O-ring seal (58) and ring assembly (59). Remove spring retainer (60). Remove springs (61), (62), and (64). Remove spring retainer (63) and rod (65).
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Illustration 28 g00875602 - Remove bolts (66) and cover (67).
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Illustration 29 g00875604 - Remove O-ring seal (68) from cover (67).
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Illustration 30 g00877519 - Remove guide ring (69) and ring (70).
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| Illustration 1 | g01284385 |
