Piston Pump (Steering) - Disassemble
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| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 558-4585 | Fixture Assembly | 1 |
| 1U-9128 | Adapter Plate | 1 | |
| 1U-5750 | Engine Stand | 1 | |
| B | 4C-8359 | Eyebolt | 2 |
| C | 1P-0510 | Driver Gp | 1 |
| D | 8H-0663 | Bearing Puller | 1 |
| E | 1U-7602 | adapter | 1 |
| 1P-3037 | Screw Tip | 1 | |
| 1U-7600 | Slide Hammer Puller Gp | 1 | |
Start By:
- Remove the piston pump.
- Orient the piston pump with the shaft facing upward.
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Illustration 1 g06348434 - Remove retaining ring (2) and seal carrier (1) from the pump.
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Illustration 2 g06348439 - Remove lip seal (3) and O-ring seal (4) from seal carrier (1).
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Illustration 3 g06348457 - Invert the piston pump and attach to Tooling (A) or a suitable fixture. The weight of the piston pump is approximately
65 kg (143 lb) .Show/hide table
Illustration 4 g06348574 - Remove bolts (5) and valve group (6).
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Illustration 5 g06348576 - Remove gasket (7) and feedback lever (8).
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Illustration 6 g06348600 - Remove seal nut (9), plug (10), and the O-ring seal.
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Illustration 7 g06348614 - Remove bolts (11), solenoid assembly (12), and the O-ring seal from valve group (6). Repeat for the opposite side.
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Illustration 8 g06348630 - Remove cap (17), O-ring seal (16), and solenoid (15) from cartridge (14). Remove O-ring seal (13) from cartridge (14).
- Repeat for the opposite side.
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Illustration 9 g06348638 - Remove bolts (18), (19), and adapter assembly (20) from the piston pump.
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Illustration 10 g06348498 - Remove plug (21) and the O-ring seal from adapter assembly (20).
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Illustration 11 g06348503 - Remove bearing (22) and plate (23) from adapter assembly (20).
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Illustration 12 g06348509 - Remove gasket (24), pins (25), coupling (26), and ring (27).
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Illustration 13 g06348553 Note: Control plate (28) is marked with an (R).
- Remove control plate (28).
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Illustration 14 g06348560 - Remove O-ring seal (29) from control plate (28).
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Illustration 15 g06349011 Show/hide table
Illustration 16 g06349023 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 (30) from the head assembly. Remove O-ring seal (31) from plug (30). Remove spring (32) and piston (33) from the head assembly.
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Illustration 17 g06349029 - Remove plug (34) and the O-ring seal.
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Illustration 18 g06349034 Show/hide table
Illustration 19 g06349037 - Remove plug (35) from the head assembly.
- Remove O-ring seal (36) from plug (35). Remove piston (37) from the head assembly.
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Illustration 20 g06349048 - Remove plugs (38), (39), (40), (41), (42), and the O-ring seals from the head assembly.
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Illustration 21 g06349064 Show/hide table
Illustration 22 g06349151 - Remove relief valves (43). Remove O-ring seals (44) and (45) from relief valves (43).
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Illustration 23 g06349154 - Remove plug (46) and the O-ring seal.
- Remove plug (47) and the O-ring seal.
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Illustration 24 g06349158 Note: Measure the length of the adjustment screw for assembly purposes.
- Remove bolts (49) and bracket (50). Remove relief valve (48).
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Illustration 25 g06349166 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 seal nut (52) from adjustment screw (51). Remove adjustment screw (51) and O-ring seal (53) from relief valve (48).
- Remove spring (54), (55), and piston (56) from the head assembly.
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Illustration 26 g06349195 - Remove bolts (57), control (58), and the gasket.
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Illustration 27 g06349200 - Remove plug (59), O-ring seal (60), and spool (61) from control (58).
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Illustration 28 g06349211 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.
Note: Measure the length of the adjustment screw for assembly purposes.
- Remove seal nut (69) and O-ring seal (68) from adjustment screw (70). Remove cap (67), guide (65), spring (64), spring (63), and guide (62), from control (58). Remove O-ring seal (66) from plug (67).
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Illustration 29 g06349221 - Remove rollers (71) and roller casing (72).
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Illustration 30 g06349232 - Remove inner bearing shell (73) and outer bearing shell (74).
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Illustration 31 g06349241 Note: Control plate (75) is marked with an (L).
- Remove control plate (75).
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Illustration 32 g06349244 - Remove O-ring seal (76) from control plate (75).
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Illustration 33 g06349250 - Remove ring (77).
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Illustration 34 g06349253 Show/hide table
Illustration 35 g06349257 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 (78).
- Attach Tooling (B) and a suitable lifting device to head assembly (79). Remove head assembly (79). The weight of head assembly (79) is approximately
25 kg (55 lb) .Show/hide table
Illustration 36 g06349267 - Remove control plate (80) and orifice (81).
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Illustration 37 g06349273 - Remove bearings (82) and (83).
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Illustration 38 g06349304 - Remove gasket (84) and pins (85).
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Illustration 39 g06349308 - Rotate the housing to a horizontal position. Remove rotating group (86).
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Illustration 40 g06349339 - Remove pistons (87) and retainer (88).
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Illustration 41 g06349346 - Remove bearing (89).
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Illustration 42 g06349355 - Remove spring (90) from barrel (91).
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Illustration 43 g06349359 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.
- Use Tooling (C) and a suitable press to remove retaining ring (92) from barrel (91).
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Illustration 44 g06349363 - Remove washer (95), spring (94), and washer (93) from barrel (91).
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Illustration 45 g06350667 - Measure the length of servo can (96) for assembly purposes. Repeat for the opposite side.
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Illustration 46 g06349399 Note: Mark servo can (96) and locking plate (98) for assembly purposes.
- Remove bolts (97) and locking plate (98). Remove servo can (96). Repeat for the opposite side.
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Illustration 47 g06349412 - Remove O-ring seal (99) from servo can (96). Repeat for the opposite side.
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Illustration 48 g06349416 - Remove servo piston (101) and swashplate (100) as a unit.
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Illustration 49 g06349427 - Remove servo piston (101) from swashplate (100).
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Illustration 50 g06349633 - Remove seals (102) and slide block (103) from servo piston (101).
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Illustration 51 g06349431 - Remove roller bearings (104).
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Illustration 52 g06349433 - Remove bearing races (105).
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Illustration 53 g06349645 - Rotate the piston pump to the horizontal position. Remove retaining ring (106). Use a soft faced hammer to remove shaft assembly (107).
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Illustration 54 g06349649 - Remove retaining ring (108) from shaft assembly (107).
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Illustration 55 g06350676 - Use Tooling (D) and a suitable press to remove bearing (109) from shaft assembly (107).
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Illustration 56 g06349727 Show/hide table
Illustration 57 g06351848 Show/hide table
Illustration 58 g06351842 - Use Tooling (E) to remove filter assemblies (110) from housing (111).
- Remove inner sleeve (110A), outer sleeve (110B), and filter (110C).
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Illustration 59 g06349732 - Remove plug (112) and the O-ring seal. Remove plugs (113) and the O-ring seals from housing (111).
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Illustration 60 g06349737 - Remove plug (114) and the O-ring seal. Remove plugs (115) and the O-ring seals from housing (111).
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