69D and 769D Off-Highway Trucks and 771D Quarry Truck Machine Systems Caterpillar


Brake Valve (Parking and Secondary) - Assemble

Usage:

769D 5SS

Assembly Procedure

  1. Check all of the O-ring seals and the components for wear or damage. Replace the components, if necessary.

  2. Lubricate all of the O-ring seals lightly with the lubricant that is being sealed.


    Illustration 1g00573596

  3. Install O-ring seal (28) and (29) on check valve (27).

  4. Install valve (30), dowel (33), spring (31), O-ring seal (32) and O-ring plug (34) onto check valve (27).


    Illustration 2g00485484

  5. Lubricate the bore lightly with the lubricant that is being sealed. Install check valve (27) to brake valve (2).


    Illustration 3g00573552

  6. Install O-ring seal (26), (25) and (24) onto relief valve (18).

  7. Install gasket (21) and nut (22). Tighten nut (22) to a torque of 17 ± 2 N·m (150 ± 18 lb in).

  8. Install gasket (21) and cap (20) to relief valve (18). Tighten cap (20) to a torque of 17 ± 2 N·m (150 ± 18 lb in).


    Illustration 4g00573551

  9. Install O-ring plug (19) and relief valve (18) to brake valve (2).


    Illustration 5g00485423


    Illustration 6g00485422

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

    Improper assembly of parts that are spring loaded can cause bodily injury.

    To prevent possible injury, follow the established assembly procedure and wear protective equipment.


  10. Install spool (15), four shims (16), spring (17), the O-ring seal and O-ring plug (14) to brake valve (2).


    Illustration 7g00572414

  11. Install lip seal (13) into head (10).


    Illustration 8g00572404


    Illustration 9g00485320

  12. Install seal (8) and seal (11) onto piston (9). Install piston (9) into air cylinder (6).

  13. Install seal (12) onto head (10). Install head (10) into air cylinder (6).

  14. Install snap ring (7) onto air cylinder (6).


    Illustration 10g00485266

  15. Install air cylinder (6) to brake valve (2). Install two locking bolts (5) and the hard washers.


    Illustration 11g00485264

  16. Install O-ring seal (4) to check valve (1).


    Illustration 12g00485180

  17. Install connector (3) and check valve (1) to brake valve (2).

End By:

  1. Install the parking and secondary brake valve. Refer to Disassembly and Assembly, "Brake Valve (Parking and Secondary) - Install".

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