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	g00496437

3. Apply 4C-4030 Thread Lock Compound to the threads of three bolts (14).

4. Install plate (15), three bolts (14) and the washers onto metering pump (1).
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   Illustration 2	g00496432

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   Illustration 3	g00496434

5. Install bracket assembly (13) onto metering pump (1). Install the following items: four bolts (10), eight washers (11) and eight mountings (12).
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   Illustration 4	g00496431

6. Install four elbows (9) onto metering pump (1).

   Note: Position the elbows, as shown. This will ease installation.

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   Illustration 5	g00496430

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   Illustration 6	g00496428

7. Use two people to install the metering pump. The weight of the metering pump is 45 kg (100 lb). Install four bolts (8) and the washers.

   Note: Do not tighten four bolts (8) until the metering pump shaft is positioned correctly.

   Note: Apply 4C-4030 Thread Lock Compound to the threads of nut (6) prior to installation.

8. Install nut (6). Tighten nut (6) to a torque of 101.7 ± 2 N·m (75 ± 1 lb ft).

9. Tighten four bolts (8).
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   Illustration 7	g00496429

10. Install four caps (7).
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    Illustration 8	g00496426

11. Connect tube assembly (5).
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    Illustration 9	g00496425

12. Connect tube assembly (4).
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    Illustration 10	g00496424

13. Connect tube assembly (3).
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    Illustration 11	g00496421

14. Connect tube assembly (2) onto metering pump (1).

15. Refill the steering hydraulic tank with hydraulic oil to the correct level. Refer to Operation and Maintenance Manual, SEBU7173, "Steering System Oil - Change" for the correct procedure.

End By:

1. Install the cab front plate. Refer to Disassembly and Assembly, "Plate (Cab Front) - Remove and Install".