Disassembly Procedure
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Table 1
| Required Tools |
| Tool |
Part Number |
Part Description |
Qty |
| (A) |
1P-1859 |
Retaining Ring Pliers |
1 |
| (B) |
4C-8359 |
Eyebolts |
2 |
| (C) |
1P-0074 |
Slide Hammer Puller |
1 |
| (D) |
5F-7345 |
Screw |
1 |
| 7S-7786 |
Puller Legs |
2 |
| 5F-7344 |
Crossblock |
1 |
| 9S-9155 |
Spacer |
1 |
| (E) |
1P-1862 |
Retaining Ring Pliers |
1 |
| (F) |
1U-7600 |
Slide Hammer Puller |
1 |
Start By:
- Remove the swing motor. Refer to Disassembly and Assembly, "Swing Motor - 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: The following procedure is for the disassembly of a swing motor that has a swing parking brake.
Note: Regular maintenance and frequent inspections are routine precautions. Practice preventive maintenance before damage occurs. Preventive maintenance can help to avoid a failure. If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information is available to analyze failures for piston pumps and motors. Refer to Special Publication, SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
Note: Many times, the installation of new parts is not necessary. The installation of used parts during reconditioning is acceptable. Used parts can result in a substantial cost reduction. Reusable information is available on piston pumps and motors. Refer to Special Publication, SEBF8032, "Guideline For Reusable Parts - Piston Pumps and Motors". During reconditioning, correct any conditions that might have caused the original failure.
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. Dirt and contaminants can damage precision components that are in pumps and motors. All disassembly and assembly procedures must be performed on a clean work surface. Clean all the interior components in clean solvent. Dry all the interior components with compressed air. Plug ports and plug hoses on the machine during repair.
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| NOTICE |
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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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| Illustration 1 | g00725398 |
- Remove O-ring seal (1) from housing (2). Use Tooling (A) to remove retaining ring (3) from shaft (4) .
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| Illustration 2 | g00725399 |
- Place the swing motor on wood blocks, as shown. Remove three bolts (5) from body (6). Remove solenoid valve assembly (7) from the body.
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| Illustration 3 | g00725407 |
- Remove two O-ring seals (8) from the valve body. Remove orifice (9) from the valve body.
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| Illustration 4 | g00725408 |
- Remove two bolts (10) from the valve body. Remove solenoid (11) from the valve body.
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| Illustration 5 | g00725409 |
- Remove O-ring seals (12), (13), (14), and (15) from the solenoid.
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| Illustration 6 | g00725417 |
- Remove two relief valves (16) from head (17) .
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| Illustration 7 | g00726111 |
- Remove O-ring seal (22), O-ring seal (21), backup ring (20), O-ring seal (19), and backup ring (18) from the relief valve.
- Repeat for the other relief valve.
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| Illustration 8 | g00725443 |
- Remove four socket head bolts (23) from the head.
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| Illustration 9 | g00725480 |
- Install Tooling (B) and use a suitable lifting device to remove the head from the housing.
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| Illustration 10 | g00725488 |
- Remove O-ring seal (24) from the head.
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| Illustration 11 | g00725493 |
- Use Tooling (C) to remove bearing (25) from the head. Remove two roll pins (26) from the head.
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| Illustration 12 | g00725509 |
- Remove two plugs (27) from the head.
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| Illustration 13 | g00725644 |
- Remove O-ring seal (28) from plug (27) .
- Repeat for the other plug.
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| Illustration 14 | g00725566 |
- Remove two makeup valves (29) from the head.
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| NOTICE |
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Put identification marks on the components of each makeup valve as the makeup valves are removed from the valve casing of the swing motor. The components of each makeup valve must be reinstalled in the component's original location. |
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| Illustration 15 | g00725567 |
- Remove plug (30), O-ring seal (31), spring (32), and valve (33) from the head.
- Repeat for the other side of the head.
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| Illustration 16 | g00725581 |
- Remove eight bolts (34) and the washers. Remove four half flanges (35) and two covers (36) from the head.
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| Illustration 17 | g00725578 |
- Remove port plate (37) from the barrel assembly. Remove eighteen springs (38) from the housing.
Note: Mark the position of the piston in the housing of the swing motor for assembly purposes.
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| Illustration 18 | g00725582 |
- Install Tooling (D), as shown. Remove piston (39) from the housing.
Note: Mark the position of the seven plates in the housing for assembly purposes.
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| Illustration 19 | g00725598 |
- Remove four separator plates and three friction plates (40) from the housing.
Note: Mark the location of the barrel assembly in the housing for assembly purposes. During the removal of the barrel assembly from the housing, do not allow the components to come apart. All parts in the barrel assembly must be reinstalled in the original locations.
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| Illustration 20 | g00725600 |
- Place the swing motor on the swing motor's side, as shown. Remove barrel assembly (41) from the shaft.
Note: Mark the location of the nine piston assemblies in the barrel for assembly purposes.
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| Illustration 21 | g00725614 |
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| Illustration 22 | g00725615 |
- Remove nine piston assemblies (42) and plate (43) as a unit from barrel (44). Remove the plate from the nine piston assemblies.
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| Illustration 23 | g00725617 |
- Remove bushing (45) from the barrel.
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| Illustration 24 | g00725620 |
- Remove spacer (46) from the bushing.
Note: There are twelve pins in the barrel. Two pins are used in each of the six hole locations.
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| Illustration 25 | g00725633 |
- Remove twelve pins (47) from the barrel.
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Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force. |
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| Illustration 26 | g00725638 |
- Use a suitable press and Tooling (E) to remove retaining ring (48) from the barrel.
Note: The two spacers are different in size. Put identification marks on the two spacers during the removal for assembly purposes.
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| Illustration 27 | g00725647 |
- Remove spacer (49), spring (50), and spacer (51) from the barrel.
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| Illustration 28 | g00725655 |
- Remove O-ring seals (52) and (53) from the housing.
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| Illustration 29 | g00725658 |
- Remove swashplate (54) from the housing.
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| Illustration 30 | g00725661 |
- Remove shaft (4) from the housing.
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| Illustration 31 | g00725933 |
- Remove inner bearing race (55), spacer (56), and inner bearing race (57) from the shaft.
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| Illustration 32 | g00725663 |
- Use Tooling (E) to remove retaining ring (58) from the housing.
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| Illustration 33 | g00725664 |
- Remove spacer (59) from the housing.
Note: The seal will be destroyed during the removal procedure.
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| Illustration 34 | g00725665 |
- Install Tooling (F), as shown. Remove seal (60) from the housing.
Note: The bearing will be destroyed during the removal procedure.
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| Illustration 35 | g00725666 |
- Remove bearing (61) from the housing.
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| Illustration 36 | g00725894 |
- Remove plug (62) from the housing.
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| Illustration 37 | g00725895 |
- Remove O-ring seal (63) from plug (62) .
