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	g00574322

3. Use a suitable lift truck (not shown) in order to position hydraulic tank (1) for installation. The weight of hydraulic tank (1) is 367 kg (810 lb).
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   Illustration 2	g00506994

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   Illustration 3	g00506995

4. Install cap (23). Install two bolts (22) and the washers.

5. Install cap (20). Install two bolts (19) and the washers.

6. Connect hose assembly (21) and (24).
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   Illustration 4	g00507002

7. Install one bolt (18), the locknut, the washers and the mountings.
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   Illustration 5	g00506992
   (12) Transmission return port. (13) Converter inlet relief port. (14) ( 15) ( 16) Brake cooling ports. (17) Control valve return port.

8. Install the following hose assemblies: (17), (16), (15), (14), (13) and (12).
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   Illustration 6	g00506987
   (8) Converter scavenger return port. (9) Parking brake drain port. (10) Parking brake lip seal drain port. (11) Brake make-up tank return port .

9. Install the following hose assemblies: (11), (10), (9) and (8).
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   Illustration 7	g00506970
   (2) Transmission suction port. (3) ( 4) Hoist pump suction port. (5) Brake cooling suction port. (6) Converter suction port. (7) Auxiliary port.

10. Install the following hose assemblies: (7), (6), (5), (4), (3) and (2).
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    Illustration 8	g00506961

11. Fill tank (A) of hydraulic tank (1) 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.

12. Fill tank (B) of hydraulic tank (1) with hydraulic oil to the correct level. Refer to Operation and Maintenance Manual, SEBU7173, "Transmission Tank Oil - Change" 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.

13. 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. Install the oil filter and base (torque converter). Refer to Disassembly and Assembly, SENR1490, "Oil Filter and Base (Torque Converter) - Install".

2. Install the retaining cable. Refer to Disassembly and Assembly, "Truck Body Retaining Cable - Remove and Install".

3. Remove the wheel chocks. Refer to Disassembly and Assembly, "Wheel Chock - Remove and Install".