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422E, 428E, 432E, 434E, 442E and 444E Backhoe Loaders Machine Systems Caterpillar


Bank Valve (Backhoe) - Disassemble - Pilot Operated

Usage:

444E HXB

Disassembly Procedure

Start By:

  1. Remove the bank valve (backhoe). Refer to Disassembly and Assembly, "Bank Valve (Backhoe) - Remove".

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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, "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 1g01401051

  1. The valves within the bank valve are positioned in the following manner. outlet manifold (1), stabilizer valve (2), extendable stick valve (3), stick valve (4), bucket valve (5), swing valve (6), boom valve (7), stabilizer valve (8), and inlet manifold (9) .
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    Illustration 2g01401145

  1. Remove nuts (11) from bank valve (10). Remove outlet manifold (1) .
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    Illustration 3g01403300

  1. Disassemble outlet manifold (1) .
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    Illustration 4g01401147

  1. Remove plugs (12) and (14). Remove O-ring seal (13) and (15) .
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    Illustration 5g01401342

  1. Remove plug (16). Remove O-ring seal (17). Remove nut (18). Remove coil (19) .
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    Illustration 6g01401363

  1. Remove spool (20). Remove cartridge (21) .
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    Illustration 7g01401393

  1. Remove backup ring (22), O-ring seal (23) and O-ring (24) from cartridge (21) .
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    Illustration 8g01401420

  1. Remove stabilizer valve (2) .
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    Illustration 9g01401440

  1. Remove O-ring seals (25) from stabilizer valve (2) .
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    Illustration 10g01401450

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove bolts (26) and cover (27) .
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    Illustration 11g01401468

  1. Remove spool (28), retainer (29), spring (30), and O-ring seal (31) .
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    Illustration 12g01401486

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove bolts (33) and cover (32). Remove check valve (34) .
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    Illustration 13g01401533
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    Illustration 14g01401537

  1. Remove O-ring seal (35), spring (35), and retainer (37). Remove O-ring seals (38) .
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    Illustration 15g01401642

  1. Remove extendable stick valve (3) .
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    Illustration 16g01401656

  1. Remove O-ring seals (41). Remove check valve (39). Remove O-ring seal (40) .
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    Illustration 17g01401667

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove bolts (42). Remove cover (43) .
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    Illustration 18g01401683

  1. Remove spool (44), retainer (45), spring (46), and O-ring seal (47) .
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    Illustration 19g01401691

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove bolts (48). Remove cover (49) .
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    Illustration 20g01401712

  1. Remove O-ring seal (50), spring (51), and retainer (52) .
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    Illustration 21g01401777

  1. Remove plug (53). Remove fittings (54) .
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    Illustration 22g01401792

  1. Remove O-ring seal (55) and orifice valve (56) .
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    Illustration 23g01401840

  1. Remove relief valves (57) and (58) .
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    Illustration 24g01681862

  1. Remove O-ring seals (59) .
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    Illustration 25g01401859

  1. Remove stick valve (4) .

  1. Repeat Steps 15 through Step 23 for the disassembly of stick valve (4) .
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    Illustration 26g01401876

  1. Remove bucket valve (5) .

  1. Repeat Steps 15 through Step 23 for the disassembly of bucket valve (5) .
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    Illustration 27g01401886

  1. Remove swing valve (6) .

  1. Repeat Steps 15 through Step 23 for the disassembly of swing valve (6) .
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    Illustration 28g01401891

  1. Remove boom valve (7) .
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    Illustration 29g01401899

  1. Remove O-ring seals (61). Remove check valves (60) .
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    Illustration 30g01401909

  1. Remove O-ring seals (63). Remove relief valve (62) .
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    Illustration 31g01402072

  1. Remove O-ring seals (64) and (66). Remove backup ring (65) .
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    Illustration 32g01402093

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove relief valve (67). Remove bolts (68) and remove cover (69) .
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    Illustration 33g01402110

  1. Remove spool (70), retainer (71), spring (72), and O-ring seal (73) .
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    Illustration 34g01402115

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove bolts (74). Remove cover (75) .
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    Illustration 35g01402129

  1. Remove O-ring seal (76), spring (77), and retainer (78) .
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    Illustration 36g01402133

  1. Remove plug (79) .
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    Illustration 37g01402154

  1. Remove O-ring seal (80) and orifice valve (81) .
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    Illustration 38g01402544

  1. Remove stabilizer valve (8) .

  1. Repeat Steps 9 through Step 13 for the disassembly of stabilizer valve (8) .
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    Illustration 39g01402845

  1. Disassemble inlet manifold (9) .
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    Illustration 40g01402379

  1. Remove O-ring seal (82) .
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    Illustration 41g01402542

  1. Remove plug (83) and O-ring seal (84) .
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    Illustration 42g01402566

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    ------ WARNING! ------

    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.

    ----------------------

  1. Remove cap (85) .
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    Illustration 43g01402584

  1. Remove spool (86), shims (87), spring (88), and O-ring seal (89) .
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    Illustration 44g01402588

  1. Remove relief valve (90) .
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    Illustration 45g01402591

  1. Remove O-ring seals (91) and (93). Remove backup ring (92) .
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    Illustration 46g01402603

  1. Remove plugs (94) and (96). Remove O-ring seal (95) and (97) .

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