Disassembly Procedure
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Table 1
| Required Tools |
| Tool |
Part Number |
Part Description |
Qty |
| A |
264-6681 |
Spool Clamp |
1 |
| B |
4C-5648 |
Threaded Adapter Gp |
1 |
| 156-7100 |
Slide Hammer Puller Gp |
1 |
| C |
341-4073 |
Spanner |
1 |
| D |
1P-1853 |
Retaining Ring Pliers |
1 |
Start By:
- Remove the bank valve. Refer to Disassembly and Assembly, "Bank Valve (Backhoe) - 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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| Illustration 1 | g01738917 |
Typical Example |
Note: Do not damage the discs and the balls that are located on the valve assemblies, during the disassembly procedures. The discs and the balls are not serviceable components.
Note: Mark the location of the relief valves during the disassembly procedure.
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| Illustration 2 | g01731914 |
- Remove nuts (1) and cover (2) .
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| Illustration 3 | g01151866 |
- Remove O-ring seals (3) from cover (2) .
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| Illustration 4 | g01731917 |
- Remove stabilizer valve (4) .
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| Illustration 5 | g01732120 |
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| Illustration 6 | g01732121 |
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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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- Remove O-ring seals (5) .
- Remove bolts (6). Remove housing assembly (7) and spool assembly (8) as a unit.
- Separate spool assembly (8) from housing assembly (7) .
- Remove the seals from housing assembly (7) .
- Remove lever (9) .
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| Illustration 7 | g01685074 |
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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 Tooling (A) and a suitable vise in order to secure spool (11). Remove rod (15), the O-ring seal, retainer (14), spring (13), and retainer (12) from spool (11). Remove plug (10) and the O-ring seal from spool (11) .
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| Illustration 8 | g01685078 |
- Remove thermal valve (16) .
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| Illustration 9 | g01732293 |
- Remove backup ring (17) and O-ring seals (18) from thermal valve (16) .
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| Illustration 10 | g01684919 |
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| Illustration 11 | g01740973 |
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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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- Remove bolts (19), cover (20), and the O-ring seals.
- Use Tooling (B) in order to remove plug (21). Remove plug (21), the O-ring seal, the spring, and the piston. Repeat for the opposite side.
- Use Tooling (B) in order to remove plugs (22). Remove plugs (22), O-ring seals (23), backup rings (24), springs (25), and poppet (26) .
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| Illustration 12 | g01740977 |
- Remove stabilizer valve (27) and rods (28) .
- Repeat Steps 4 through Steps 14 for stabilizer valve (23) .
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| Illustration 13 | g01740979 |
- Remove nut (30), coil assembly (29), and the O-ring seals.
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| Illustration 14 | g01740981 |
- Remove cartridge (31) .
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| Illustration 15 | g01740993 |
- Remove O-ring seals (33) and backup ring (32) from cartridge (31) .
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| Illustration 16 | g01740995 |
- Remove nuts (34). Remove extendable stick valve (35), if equipped.
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| Illustration 17 | g01740843 |
- Remove O-ring seals (40) .
- Remove bolts (38) and cover assembly (39) .
- Remove bolts (37) and spool assembly (36) .
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| Illustration 18 | g01740943 |
- Remove bolts (41) and cover (42) .
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| Illustration 19 | g01732453 |
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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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Note: Do not slide the surface of seals in cover assembly (49) across the lands of spool (46) .
- Clamp the tang of spool (46) into a suitable vise in order to remove bolt (47). Remove bolt (47), retainer (43), spring (44), retainer (45), plate (48), and cover assembly (49) from spool (46) .
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| Illustration 20 | g01732455 |
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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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- Remove plug (50) and the O-ring seal.
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| Illustration 21 | g01732456 |
- Remove spring (51) and spool (52) .
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| Illustration 22 | g01732457 |
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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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- Remove plug (53), the O-ring seal, and the relief valve assembly. Repeat for the other side.
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| Illustration 23 | g01151907 |
- Remove stick valve (54) .
- Repeat Steps 21 through Steps 28 for stick valve (54) .
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| Illustration 24 | g01151908 |
- Remove bucket valve (55) .
- Repeat Steps 21 through Steps 28 for bucket valve (55) .
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| Illustration 25 | g01151909 |
- Remove swing valve (56) .
- Repeat Steps 21 through Steps 28 for swing valve (56) .
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| Illustration 26 | g01151910 |
- Remove boom valve (57) .
- Repeat Steps 21 through Steps 28 for boom valve (57) .
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| Illustration 27 | g01151912 |
- Remove auxiliary valve (58), if equipped.
- Repeat Steps 21 through Steps 28 for auxiliary valve (58) .
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| Illustration 28 | g01151913 |
- Remove studs (59) from inlet manifold (60) .
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| Illustration 29 | g01151914 |
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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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- Remove plug (61) and the O-ring seal.
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| Illustration 30 | g01151915 |
- Remove spring (62) .
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| Illustration 31 | g01151916 |
- Remove spool (63) .
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| Illustration 32 | g01154671 |
- Remove cap (64) .
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| Illustration 33 | g01732695 |
- Use Tooling (C) in order to remove relief valve (65). Remove relief valve (65) .
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| Illustration 34 | g01732696 |
- Remove plug (66) and the O-ring seal.
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| Illustration 35 | g01732697 |
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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 Tooling (D) in order to remove retaining ring (67). Remove retaining ring (67), check valve (68), the spring, and the ball.
