Main Hydraulic Pump - Disassemble
Disassembly Procedure
Show/hide table
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 156-7100 | Slide Hammer Puller Gp | 1 |
| 4C-5656 | Adapter | 1 | |
| B | 138-7574 | Link Bracket | 2 |
| C | 1P-1855 | Retaining Ring Pliers | 1 |
| D | 1P-1863 | Retaining Ring Pliers | 1 |
| E | 5P-5197 | Retaining Ring Pliers As | 1 |
| F | 5P-4758 | Retaining Ring Pliers As | 1 |
Start By:
- Remove the main hydraulic pump. Refer to Disassembly and Assembly, "Main Hydraulic Pump - Remove".
- Remove the gear pump. Refer to Disassembly and Assembly, "Gear Pump (Pilot) - Remove".
- Remove bolts (1) , sensor (2) , the O-ring seal, and the backup ring.
Show/hide table
 | |
| Illustration 1 | g01174641 |
- Repeat Step 1 for the opposite side.
- Remove bolts (3) and housing (4) .
Show/hide table
 | |
| Illustration 2 | g01174675 |
- Remove O-ring seals (5) .
Show/hide table
 | |
| Illustration 3 | g01174677 |
- Remove bolts (7) , solenoid (6) , and the O-ring seals.
Show/hide table
 | |
| Illustration 4 | g01174676 |
- Remove bolts (8) , cover (9) , and the O-ring seal.
Show/hide table
 | |
| Illustration 5 | g01174679 |
- Remove impeller (10) .
Show/hide table
 | |
| Illustration 6 | g01174680 |
- Remove bolts (11) and valve (12) .
Show/hide table
 | |
| Illustration 7 | g01174678 |
- Remove O-ring seals (13) .
Show/hide table
 | |
| Illustration 8 | g01174681 |
- Remove cover (14) and the O-ring seals.
Show/hide table
 | |
| Illustration 9 | g01174682 |
- Remove bolts (15) and cover (16) .
Show/hide table
 | |
| Illustration 10 | g01174684 |
- Use Tooling (A) in order to remove plug (18) and plug (17) .
Show/hide table
 | |
| Illustration 11 | g01174685 |
- Remove bolts (19) , cover (20) , and the O-ring seals.
Show/hide table
 | |
| Illustration 12 | g01174686 |
Show/hide table
 | |
| Illustration 13 | g01174687 |
Show/hide table
 | |
| Illustration 14 | g01174688 |
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 bolts (21) , cover (22) , and the O-ring seals.
- Remove spring (23) , spring (24) , and retainer (25) .
- Remove spring (26) , sleeve (27) , and piston (28) .
- Remove plug (29) .
Show/hide table
 | |
| Illustration 15 | g01174691 |
- Remove spring (30) .
Show/hide table
 | |
| Illustration 16 | g01174692 |
- Use Tooling (C) in order to remove retaining ring (40) .
Show/hide table
 | |
| Illustration 17 | g01174693 |
Show/hide table
 | |
| Illustration 18 | g01174694 |
- Remove O-ring seals (34) .
- Remove retainer (39) and spring (38) .
- Remove lever (31) , lever (32) , and lever (33) .
- Remove spool (35) , spool (37) , sleeve (36) , and spool (41) .
- Repeat Steps 8 through Steps 23 for valve (42) .
Show/hide table
 | |
| Illustration 19 | g01174695 |
- Attach Tooling (B) and a suitable lifting device to head assembly (45) .
Show/hide table
 | |
| Illustration 20 | g01174696 |
- Remove bolts (44) and bolts (43) .
- Remove head assembly (45) .
- Remove port plates (47) and barrels (48) .
Show/hide table
 | |
| Illustration 21 | g01174697 |
- Remove gasket (46) .
- Remove springs (49) .
Show/hide table
 | |
| Illustration 22 | g01175099 |
- Remove bearings (52) , pistons (50) , and retainer (51) .
Show/hide table
 | |
| Illustration 23 | g01174698 |
- Remove plates (53) and swashplates (54) .
Show/hide table
 | |
| Illustration 24 | g01174699 |
- Attach Tooling (B) and a suitable lifting device to cover (56) .
Show/hide table
 | |
| Illustration 25 | g01174701 |
- Remove bolts (55) and cover (56) .
- Use Tooling (D) in order to remove retaining ring (59) .
Show/hide table
 | |
| Illustration 26 | g01174702 |
- Remove shim (60) and gear (57A) .
- Use Tooling (E) in order to remove retaining ring (58) .
- Remove shim (62) , gear (58) , and the gasket (61) .
- Remove shim (66) .
Show/hide table
 | |
| Illustration 27 | g01174723 |
Show/hide table
 | |
| Illustration 28 | g01174724 |
- Use Tooling (F) in order to remove retaining ring (63) .
- Use Tooling (F) in order to remove retaining ring (65) .
- Remove shaft assembly (64) .
- Remove shaft assembly (67) .
- Remove bolts (68) and bearing carriers (69) .
- Use Tooling (D) in order to remove retaining ring (70) from bearing (72) .
Show/hide table
 | |
| Illustration 29 | g01174725 |
- Use Tooling (D) in order to remove retaining ring (71) .
- Use a suitable press in order to remove bearing (72) from shaft assembly (67) .
Show/hide table
 | |
| Illustration 30 | g01174813 |
- Use Tooling (D) in order to remove retaining ring (73) from bearing (74) .
Show/hide table
 | |
| Illustration 31 | g01174814 |
- Use a suitable press in order to remove bearing (74) from shaft assembly (64) .
Show/hide table
 | |
| Illustration 32 | g01174815 |
- Remove bolts (77) and screws (76) .
Show/hide table
 | |
| Illustration 33 | g01174816 |
- Remove bolts (75) and covers (78) .
- Remove plugs (79) and the O-ring seals.
Show/hide table
 | |
| Illustration 34 | g01174817 |
- Unscrew pistons (80) from pin assemblies (81) .
Show/hide table
 | |
| Illustration 35 | g02251817 |
- Remove pin assemblies (81) .
Show/hide table
 | |
| Illustration 36 | g02251815 |
Caterpillar Information System:
M318C and M322C Excavators Machine Systems Cab - Install
M318C and M322C Excavators Machine Systems Cab - Remove
M318C and M322C Excavators Machine Systems Counterweight - Remove and Install
301.6C and 301.8C Mini Hydraulic Excavators Machine Systems Swing Motor - Install
301.6C and 301.8C Mini Hydraulic Excavators Machine Systems Swing Motor - Remove
301.6C and 301.8C Mini Hydraulic Excavators Hydraulic System Travel Hydraulic System
725C2 and 730C2 Articulated Truck Machine System Window Wiper and Wiper Motor (Front) - Remove and Install
324D Excavator Hydraulic System Pilot Hydraulic System
301.6C and 301.8C Mini Hydraulic Excavators Machine Systems Hydraulic Tank - Install
301.6C and 301.8C Mini Hydraulic Excavators Machine Systems Hydraulic Tank - Remove
301.6C and 301.8C Mini Hydraulic Excavators Machine Systems Main Control Valve - Install
M318C and M322C Excavators Machine Systems Swing Pump - Install
345C MHPU Mobile Hydraulic Power Unit Machine Systems Main Hydraulic Pump - Assemble
325D and 329D Excavators Capacities (Refill)
2005/12/26 New Seals for the Glass in the Cab Prevent the Entry of Debris and Moisture {7310}
302.5C Mini Hydraulic Excavator Engine Supplement Muffler - Remove and Install
345C MHPU Mobile Hydraulic Power Unit Demolition Boom Removal
302.5C Mini Hydraulic Excavator Engine Supplement Battery - Remove and Install
301.6C and 301.8C Mini Hydraulic Excavators Hydraulic System Travel Motor
302.5C Mini Hydraulic Excavator Engine Supplement Hydraulic Oil Cooler - Remove and Install
345B Series II Excavator Hydraulic System (Ecomate Attachment) Boom Hydraulic System
320D Excavator Operator Controls
330D and 336D Excavators Lifting Capacities
303C CR, 303.5C CR, 304C CR and 305C CR Mini Hydraulic Excavators Quick Coupler - Clean