784C and 785C Off-Highway Trucks Machine Systems Caterpillar

Installation Procedure

Note: Cleanliness is an important factor. Before the installation procedure, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble.

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.
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   Illustration 1	g00499641

3. Use four bolts (13) and the washers in order to install brake valve (1) to the frame assembly.
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   Illustration 2	g00499640

4. Connect hose assembly (12).
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   Illustration 3	g00499638

5. Connect hose assembly (11).
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   Illustration 4	g00499636

6. Connect hose assembly (10).
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   Illustration 5	g00499634

7. Connect hose assembly (9).
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   Illustration 6	g00499632

8. Connect hose assembly (8).
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   Illustration 7	g00499628

9. Connect hose assembly (7).
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   Illustration 8	g00499620

10. Connect hose assembly (6).
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    Illustration 9	g00499615

11. Connect hose assembly (5).
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    Illustration 10	g00499612

12. Connect hose assembly (4).
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    Illustration 11	g00499600

13. Connect hose assembly (3).
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    Illustration 12	g00499578

14. Connect fitting (2) to brake valve (1).

15. Fill the hydraulic tank with hydraulic oil to the correct level. Refer to Operation and Maintenance Manual, SEBU7173, "Hoist, Torque Converter and Brake Tank Oil - Change " for the correct procedure.

16. Charge the air pressure in the air tank. Refer to Operation and Maintenance Manual , ""Starting with an External Air Supply" for the correct procedure.
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    Personal injury or death can result from air in the oil for the brake hydraulic system. Air in the system can prevent complete brake application and it is possible that the wheels on the machine can not be stopped. Air must not be in the oil for the brake hydraulic system to function properly.

17. Purge the air from the hydraulic oil in the brake hydraulic system. Refer to Systems Operation/Testing and Adjusting, SENR1494, "Brake System Air - Purge" for the correct procedure.

End By:

1. Disconnect the retaining cable. Lower the truck body. Refer to Disassembly and Assembly, "Truck Body Retaining Cable - Remove and Install".

2. Remove the wheel chocks. Refer to Disassembly and Assembly, "Wheel Chock (Front and Rear) - Remove and Install".