797 Off-Highway Truck Power Train Caterpillar

Assembly Procedure

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. Lubricate all seals with a light film of oil prior to installation.

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Illustration 1	g00683938

1. Install O-ring seal (61) onto the plug.
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   Illustration 2	g00683937

2. Install two plugs (60) and the O-ring seals. Refer to Power Train Specifications, "Transmisson Hydraulic Control" for the correct tightening procedure. Install plate (58). Install thirteen bolts (59). Refer to Power Train Specifications, "Transmisson Hydraulic Control" for the correct tightening procedure.
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   Illustration 3	g00683936

3. Install plate (57). Install twelve bolts (56).
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   Illustration 4	g00683935

4. Install orifice plug (55) into the spool.
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   Illustration 5	g00683934

5. Install ball (52), spring (53), and retainer (54) into the spool.
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   Illustration 6	g00683932

6. Use Tooling (A) in order to install retaining ring (51) into the spool.
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   Illustration 7	g00683930

7. Install spool (50) into the relief valve.
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   Illustration 8	g00683928

8. Install spring (48) and stop (49) into the relief valve.
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   Illustration 9	g00683927

9. Install O-ring seal (47) into the relief valve.
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   Illustration 10	g00683926

10. Install bolt (46) into the cover.
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    Illustration 11	g00683925

11. Install cover (45) onto the relief valve. Install four bolts (44) and the washers.
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    Illustration 12	g00683924

12. Install O-ring seal (43) into the adjustment cover.
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    Illustration 13	g00683922

13. Install adjustment cover (42). Install two bolts (41) and the washers.
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    Illustration 14	g00683791

14. Install slug (40) into the relief valve.
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    Illustration 15	g00683645

15. Install O-ring seal (39) onto the plug.
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    Illustration 16	g00683620

16. Install plug (38) and the O-ring seal into the relief valve.
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    Illustration 17	g00683611

17. Install O-ring seal (37) onto the fitting.
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    Illustration 18	g00683556

18. Install fitting (36) and the O-ring seal into the relief valve.

    Note: Prior to installation, refer to Power Train Specifications, "Transmission Relief Valve (Main)" for the bench test procedure.

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    Illustration 19	g00683545

19. Install relief valve (35) onto the manifold. Install eight bolts (34) and the washers.
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    Illustration 20	g00683523

20. Install O-ring seal (29). Install O-ring seal (30) and back up ring (31). Install O-ring seal (32) and back up ring (33).
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    Illustration 21	g00683531

21. Install cartridge (28) into the manifold. Refer to Power Train Specifications, "Transmisson Hydraulic Control" for the correct tightening procedure.
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    Illustration 22	g00683484

22. Install coil assembly (27). Install washer (26). Install nut (25). Refer to Power Train Specifications, "Transmisson Hydraulic Control" for the correct tightening procedure.
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    Illustration 23	g00682957

23. Install four control valves (23). Install sixteen bolts (24). Install two control valves (22). Install six bolts (21).
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    Illustration 24	g00682087

24. Install two plates (19). Install four plates (20).
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    Illustration 25	g00676018

25. Install five modulating valves (18). Install six bolts (17) and the washers. Install two modulating valves (16). Install twenty bolts (15) and the washers.
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    Illustration 26	g00675912

26. Install wiring harness (14). Install clips (12). Install eight bolts (13) and the washers. Connect electrical connectors (11).
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    Illustration 27	g00675895

27. Install six adapters (8), two adapters (9), two adapters (10) and the O-ring seals. Refer to Power Train Specifications, "Transmisson Hydraulic Control" for the correct tightening procedure.
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    Illustration 28	g00675878

28. Install two drains (6). Install four bolts (7) and the washers.
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    Illustration 29	g00670009

29. Install O-ring seals (5) onto the sleeve.
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    Illustration 30	g00669984

30. Install four sleeves (3) into manifold (4). Install two retainers (2). Install two bolts (1).

End By:

1. Install the Transmission Hydraulic Control. Refer to Disassembly and Assembly, "Transmision Hydraulic Control - Install" for the machine that is being serviced.