Disassembly Procedure
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Table 1
| Required Tools |
| Tool |
Part Number |
Part Description |
Qty |
| A |
1P-1861 |
Retaining Ring Pliers |
1 |
| B |
1P-0510 |
Driver Gp |
1 |
| C |
1P-1864 |
Retaining Ring Pliers As |
1 |
| D |
1P-1862 |
Retaining Ring Pliers |
1 |
| E |
1P-0074 |
Slide Hammer Puller Gp |
1 |
Start By:
- Remove the piston motor. Refer to Disassembly and Assembly, "Piston Motor (Drum Propel) - Remove".
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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 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. |
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Note: Cleanliness is an important factor. Before you begin the disassembly procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform disassembly procedures on a clean work surface. Keep components covered and protected at all times.
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 the failures of the piston pump and the motor. Refer to Special Publication, SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
Note: After disassembly has been completed, check the condition of all the components. Refer to Guideline For Reusable Parts, SEBF8032, "Piston Pumps and Motors". During reconditioning, correct any conditions that might have caused the original failure. Information is available to analyze failures on the piston pumps and the motor. Refer to Special Publication, SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
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| Illustration 1 | g01222171 |
- Remove bolts (1) and remove flange (2). Remove coupling (3) and remove O-ring seal (4) .
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| Illustration 2 | g01222182 |
- Remove O-ring seal (5) .
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| Illustration 3 | g01222184 |
- Remove bolts (6) and remove head assembly (7) .
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| Illustration 4 | g01222185 |
- Remove port plate (8) and remove O-ring seal (9). Remove O-ring seal (10) .
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| Illustration 5 | g01331620 |
- Remove valve (11) and remove the O-ring seals.
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| Illustration 6 | g01331621 |
- Remove valve (12) and remove the O-ring seals.
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| Illustration 7 | g01331623 |
- Remove plug (13), cap (14), and valve (15). Remove the O-ring seals.
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| Illustration 8 | g01331625 |
- Remove rotating group (16) .
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| Illustration 9 | g01331626 |
- Remove pistons (17) and remove retainer plate (18). Remove retainer (19) from the rotating group.
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| Illustration 10 | g01331627 |
- Remove shims (20) .
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| Illustration 11 | g01331629 |
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| Illustration 12 | g01331630 |
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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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- Use the following items in order to remove retaining ring (21) from barrel assembly (22) : Tooling (A), Tooling (B) and a suitable press.
- Remove shim (25), spring (24), and shim (23) from barrel assembly (22) .
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| Illustration 13 | g01331631 |
- Remove bolts (26) and remove bolt (27). Remove cover assembly (28) .
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| Illustration 14 | g01331633 |
- Remove O-ring seal (29) and plug (30) from cover assembly (28) .
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| Illustration 15 | g01331697 |
- Remove gasket (31) and remove valve assembly (32) .
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| Illustration 16 | g01331698 |
- Remove gasket (33) .
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| Illustration 17 | g01331700 |
- Remove nuts (35) and remove O-ring seals (36) from both sides. Remove coils (37), bolts (38), and cartridges (38) from both sides.
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| Illustration 18 | g01222262 |
- Remove swashplate assembly (39) .
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| Illustration 19 | g01222264 |
- Remove guide block (40) and remove pin (41) from swashplate assembly (39). Remove bearing (42). Remove pin (44) and remove bearing (43) from swashplate assembly (39) .
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| Illustration 20 | g01222265 |
- Remove bearing races (45) .
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| Illustration 21 | g01222270 |
- Remove bolts (46). Remove cover (47) and the piston assembly from the housing.
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| Illustration 22 | g01222274 |
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| Illustration 23 | g01222277 |
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Possible injury can result when removing the retaining ring and spring. Spring force will be released when the retaining ring is removed. Be prepared to hold the cylinder assembly as the retaining ring is removed. |
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- Remove retainer (48) from flow control valve (49) .
- Use a suitable press and apply pressure to plate (50) .
- Use Tooling (C) in order to remove retaining ring (51) from control valve (49) .
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| Illustration 24 | g01222284 |
- Remove two spacers (52) from control valve (49) .
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| Illustration 25 | g01222287 |
- Remove nut (53) from shaft (54). Remove cap (55) .
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| Illustration 26 | g01222348 |
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Possible injury can result when removing the retaining ring and spring. Spring force will be released when the retaining ring is removed. Be prepared to hold the cylinder assembly as the retaining ring is removed. |
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- Remove retainer (56) and O-ring seal (57) from the shaft.
- Use a suitable press and apply pressure to the plate. Use Tooling (D) in order to remove retaining ring (58). Remove spacers (59) .
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| Illustration 27 | g01222313 |
- Remove the following items from the flow control valve: shaft (54), plate (60), spring (61), spring (62) and plate (63) .
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| Illustration 28 | g01222316 |
- Remove the following items from the control valve: plate (64), spring (65), spring (66) and plate (67) .
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| Illustration 29 | g01222319 |
- Remove O-ring seal (68) from cap (55) .
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| Illustration 30 | g01222321 |
- Remove bolts (69) and remove cover (70) .
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| Illustration 31 | g01222326 |
- Use Tooling (A) in order to remove retaining ring (71) from the housing.
- Use Tooling (E) in order to remove seal (72) from the housing.
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| Illustration 32 | g01222331 |
- Use Tooling (A) in order to remove retaining ring (73) from the housing.
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| Illustration 33 | g01222333 |
- Remove shaft (74) from the housing.
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| Illustration 34 | g01222335 |
- Use Tooling (C) in order to remove retaining ring (75) from shaft (74) .
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| Illustration 35 | g01222338 |
- Use a suitable press in order to remove bearing (76) from shaft (74) .
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| Illustration 36 | g01222342 |
- Remove plug (77) and remove pin retainer (78) .
