| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 439-3939 | Link Bracket | 1 |
| B | 1P-0510 | Driver Gp | 1 |
| C | 1P-1861 | Retaining Ring Pliers | 1 |
| D | 1U-7600 | Slide Hammer Puller Gp | 1 |
Start By:
- Remove the piston pump.
- Drain the piston pump.
- Remove bolts (1) and pump control (2) from the piston pump.
Show/hide table
Illustration 2 g03859742 Show/hide table
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.
- Remove plug (3), spool (5), and plug (7) from pump control (2).
- Remove valve group (4). Refer to Step 12 for more instructions.
- Remove plug assembly (6), O-ring seals (8), O-ring seal (9), piston assembly (10), and pins (12) from pump control (2).
- Remove valve group (13). Refer to Step 8 for more instructions.
- Remove retaining ring (17), pin (15), O-ring seal (16), and lever (11) from pump control (2).
- Remove bushing (14) from pump control (2).
Show/hide table
Illustration 3 g03859745 Show/hide tablePersonal 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.
- Remove locknut (29) and setscrew (30) from the pump control.
- Remove spring (26) and retainer (23) from the pump control.
- Remove coil assembly (13), bolts (27), spacer (18), O-ring seal (19), and O-ring seal (28) from sleeve (22).
- Remove piston (25), spring (21), O-ring seals (24), and bushing (20) from sleeve (22).
Show/hide table
Illustration 4 g03859919 Show/hide tablePersonal 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.
- Remove spool (35) and pin (36) from the pump control.
- Remove adapter (39) from valve group (4).
- Remove locknut (34), setscrew (38), and O-ring seal (41) from plug (33).
- Remove spring retainers (37), spring (32), piston (40), and O-ring seals (31) from adapter (39).
Show/hide table
Illustration 5 g03861110 - Remove hub (43) and O-ring seal (44) from flange (45).
- Remove bolts (42) and flange (45) from shuttle valve group (46).
Show/hide table
Illustration 6 g03861112 - Remove O-ring seal (47) from flange (45).
Show/hide table
Illustration 7 g03860515 Show/hide tablePersonal 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.
- Attach Tooling (A) and a suitable lifting device to shuttle valve group (46).
- Remove bolts (48) and shuttle valve group (46).
Show/hide table
Illustration 8 g03861296 Typical Example - Remove bushing (48) and port plate (49) from shuttle valve group (46).
Show/hide table
Illustration 9 g03860631 - Remove plugs (50), (51), (52), and the O-ring seals from the shuttle valve group.
- Remove dowels (55) and dowel (57) from the shuttle valve group.
- Use Tooling (B) to remove roller bearing (53) from the shuttle valve group.
- Remove break off plugs (54) and (56) from the shuttle valve group.
Show/hide table
Illustration 10 g03861580 - Remove seat adjuster group (58). Remove rod adjuster assembly (59).
Show/hide table
Illustration 11 g03861605 - Disassemble the seat adjuster group, as follows: rod (60), piston (61) and spring (62).
Show/hide table
Illustration 12 g03861606 - Disassemble the rod adjuster assembly, as follows: rod (63), piston (64) and spring (65).
Show/hide table
Illustration 13 g03861626 - Mark the position of the maximum angle stop screw (66) prior to removal from piston pump body (67). Remove maximum angle stop screw (66). Repeat for the opposite side of the piston pump in order to remove the minimum angle stop screw.
Show/hide table
Illustration 14 g03861631 - Remove O-ring seal (70). Remove swashplate (69) and barrel assembly (68) as one piece.
Show/hide table
Illustration 15 g03861661 Show/hide table
Illustration 16 g03861663 Note: Mark barrel (68), pistons (71), and swashplate (69) for orientation.
- The swashplate must be heated in order to remove bolts (75) from swashplate (69).
Note: Bolts (75) should be replaced with new bolts.
- Remove retainers (73) and (74) from swashplate (69).
- Remove barrel (68) from swashplate (69).
- Remove pistons (71) and retaining plate (72) from barrel (68).
Show/hide table
Illustration 17 g03861680 Show/hide table
Illustration 18 g03862893 Show/hide table
Illustration 19 g03861682 - Remove ball guide (76) from barrel (68).
- Remove springs (77) and shims (78) from barrel (68).
Show/hide table
Illustration 20 g03861691 - Remove plugs (79), the O-ring seals, and retainers (80).
- Repeat Step 37 for the opposite side.
Show/hide table
Illustration 21 g03861703 - Remove rods (81) from swashplate (69).
Show/hide table
Illustration 22 g03861708 - Remove bearings (82) from piston pump body (67).
Show/hide table
Illustration 23 g03861715 - Remove bearing liners (83) from piston pump body (67).
Show/hide table
Illustration 24 g03861717 - Use Tooling (C) to remove retaining ring (84).
- Use Tooling (D) to remove lip seal (85).
- Use Tooling (C) to remove retaining ring (86).
Show/hide table
Illustration 25 g03861746 - Remove shaft (87) from piston pump body (67).
Show/hide table
Illustration 26 g03861747 - Remove retaining ring (88) from shaft (87).
- Use a suitable press to remove bearing (89) from shaft (87).
| |
| Illustration 1 | g03859279 |
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 139-7575 | Link Bracket | 1 |
Start By:
- Remove the piston pump.
| NOTICE |
|---|
|
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: Steps 2 through 4 are for the Left Hand pump only.
Note: Note the location and orientation of the components for assembly purposes.
- Drain the piston pump.
Show/hide table
Illustration 27 g03378004 - Remove O-ring seal (1) and coupler (2).
- Remove bolts (3) and mounting flange (4).
Show/hide table
Illustration 28 g03378058 - Remove O-ring seal (5) from mounting flange (4).
Show/hide table
Illustration 29 g03378818 Show/hide tablePersonal 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.
- Remove bolts (6) and pump control (7).
Show/hide table
Illustration 30 g03378822 Show/hide tablePersonal 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.
- Remove plug (8), the O-ring seal, pin (9), and spool (10) from pump control (7).
- Remove adapter (11) and the O-ring seal.
- Remove cap assembly (17), the O-ring seal, spring (16), spring (15), guide (14), spool (13), and sleeve (12).
Show/hide table
Illustration 31 g03378925 Show/hide tablePersonal 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.
- Remove nut (18), O-ring seal (19), solenoid (20), cartridge (21), guide (22), spring (23), and guide (24) from pump control (7).
Show/hide table
Illustration 32 g03378936 Show/hide tablePersonal 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.
- Remove cap assembly (28), the O-ring seal, guide (27), spring (26), and guide (25).
Show/hide table
Illustration 33 g03378996 Show/hide table
Illustration 34 g03379022 - Remove O-ring seals (29), O-ring seal (30), and sensor group (31).
- Remove roller spool assembly (32), spring (33), and guide (34).
Show/hide table
Illustration 35 g03378946 - Remove retaining clip (35) and rotor assembly (36).
Show/hide table
Illustration 36 g03380652 - Remove retaining clip (37).
Show/hide table
Illustration 37 g03379065 Show/hide table
Illustration 38 g03379079 Show/hide tablePersonal 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.
- Remove bolts (38). Use Tooling (A) and a suitable lifting device to remove head (39) from pump body (40).
Show/hide table
Illustration 39 g03379336 - Remove port plate (41), bushing (42), and bearing (43) from head (39).
Show/hide table
Illustration 40 g03379364 - Remove seat adjuster group (44). Remove rod adjuster assembly (45).
- Remove O-ring seal (46).
Show/hide table
Illustration 41 g03379440 - Disassemble the seat adjuster group, as follows: rod (47), piston (48) and spring (49).
Show/hide table
Illustration 42 g03379443 - Disassemble the rod adjuster assembly, as follows: rod (50), piston (51) and spring (52).
Show/hide table
Illustration 43 g03379444 - Remove bolts (53). Remove retainers (54).
Show/hide table
Illustration 44 g03379710 - Measure Dimension (X) and Dimension (Y). Record the measurements for assembly purposes. Loosen locknuts (55). Tighten setscrews (56) in order to contact the swashplate. Tighten locknuts (55).
Show/hide table
Illustration 45 g03379448 - Place the pump on a level surface. Remove rotating group (57). Keep the rotating group assembly together with the pistons.
Show/hide table
Illustration 46 g03379449 - Mark the pistons so the pistons can be installed in the original bores.
- Remove pistons (58) and plate (59) from barrel (60).
- Remove pistons (58) from plate (59).
Show/hide table
Illustration 47 g03379769 - Remove spring retainer (61).
Show/hide table
Illustration 48 g03379461 Show/hide table
Illustration 49 g03379467 - Remove spring washers (62).
- Remove shims (63).
Note: Spring washers (62) are concave and shims (63) are flat.
Show/hide table
Illustration 50 g03379470 - Loosen locknuts (56) (not shown). Remove hidden setscrews (55) and locknuts (56). Remove swashplate assembly (64).
Show/hide table
Illustration 51 g03379471 - Remove rods (65). Remove bearings (66) from swashplate (64).
- Repeat Step 32 for the other side of the swashplate.
Show/hide table
Illustration 52 g03379912 Show/hide table
Illustration 53 g03379914 - Remove bearings (67). Remove covers (68).
Show/hide table
Illustration 54 g03379916 Note: Guide pins (69) are slotted in order to secure rods (65) during the assembly procedure. Refer to Illustration 51.
- Remove guide pins (69).
Show/hide table
Illustration 55 g03379524 - Remove retaining ring (70). Remove seal carrier (71).
Show/hide table
Illustration 56 g03379526 - Remove O-ring seal (72) and shaft seal (73) from seal carrier (71).
Show/hide table
Illustration 57 g03379534 - Use a soft faced hammer in order to remove shaft assembly (74).
Show/hide table
Illustration 58 g03379536 - Remove retaining ring (75).
Show/hide table
Illustration 59 g03379538 - Use a suitable press to remove shaft (74) from bearing (76).
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 for piston pumps and motors. Refer to Special Publication, SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
