D6N Track-Type Tractor Power Train Brake Control Valve - Disassemble Caterpillar


Brake Control Valve - Disassemble
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D6N Track-Type Tractor Power Train [RENR5257]
BRAKING SYSTEM
VALVE GP
D6N Track-Type Tractor Power Train Brake Control Valve - Disassemble
D6N Track-Type Tractor Power Train Brake Control Valve - Assemble
1.1. Disassembly Procedure

Disassembly Procedure

Start By:

  1. Remove the brake control valve. Refer to Disassembly and Assembly, "Brake Control Valve - Remove".


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: Cleanliness is an important factor. Before you begin the disassembly procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform disassembly procedures on a clean work surface. Keep components covered and protected at all times.



    Illustration 1g00728087

  1. Remove cable straps (2). Remove bolts (3) and the washers from brake control valve (1). Remove plate (4).


    Illustration 2g00728168

  2. Remove washers (5) from manifold (6). Remove manifold (6) from brake control valve (1).


    Illustration 3g00728175

  3. Remove O-ring seal (7) from manifold (6).


    Illustration 4g00992910

  4. Remove nut (11), washer (10), and coil assembly (9) from cartridge valve (8). Remove cartridge valve (8) from manifold (6).


    Illustration 5g00992909

  5. Remove O-ring seal (15), screen (14), O-ring seal (13), and rectangular seal (12) from cartridge valve (8).


    Illustration 6g00992908

  6. Remove nut (19), washer (18), and coil assembly (17) from cartridge valve (16). Remove cartridge valve (16) from manifold (6).


    Illustration 7g00992906

  7. Remove O-ring seal (23), screen (22), O-ring seal (21), and rectangular seal (20) from cartridge valve (16).


    Illustration 8g00728255

  8. Remove plate (24) from brake control valve (1).


    Illustration 9g00992905

  9. Remove O-ring seal (25) from valve body (26). Remove bolts (27) and (28) and the washers. Remove valve body (26).


    Illustration 10g00728292

  10. Remove O-ring seal (29) from valve body (26).


    Illustration 11g00992904

    ------ 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.


  11. Remove bolts (30) and the washers. Remove bracket (31) from valve body (26). Remove bolts (33) and plate (32).


    Illustration 12g00992903

  12. Remove O-ring seals (37), springs (36) and (35), and pistons (34) from valve body (26).


    Illustration 13g00993566

    ------ 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.


  13. Remove plug (38) from valve body (26).


    Illustration 14g00992902

  14. Remove O-ring seal (42) from plug (38). Remove spring (41) and spool (40) from valve body (26). Remove plug (39).


    Illustration 15g00992900

    ------ 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.


  15. Remove O-ring seal (45) from plug (39). Remove spring (44) and spool (43) from valve body (26).


    Illustration 16g00993630

  16. Remove separator plate (46).


    Illustration 17g00993632

  17. Remove screen (47) and the O-ring seal from separator plate (46).


    Illustration 18g00993633

  18. Remove O-ring seal (48) from manifold (49).


    Illustration 19g00992899

  19. Remove nut (50), washer (51), and coil assembly (52) from cartridge valve (53). Remove cartridge valve (53) from manifold (49).


    Illustration 20g00992898

  20. Remove O-ring seals (54) and (55) from cartridge valve (53).


    Illustration 21g00992897

  21. Remove adapter (58), O-ring seal (59), and pin (60) from cartridge valve (53). Remove seat (56) and ball (57) from adapter (58).


    Illustration 22g00992896

  22. Remove dowel (61) from manifold (49).


    Illustration 23g00993297

  23. Remove spool (62) from manifold (49).


    Illustration 24g00992894

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

    Personal injury can result from parts and/or covers under spring pressure.

    Spring force will be released when covers are removed.

    Be prepared to hold spring loaded covers as the bolts are loosened.


  24. Remove retaining ring (63), retainer (64), and spring (65) from spool (68). Remove O-ring seal (66) from stop (67). Remove stop (67) from spool (68).

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