D11R Track-Type Tractor Machine Systems Caterpillar

Assembly Procedure

1. Clean all parts and inspect all parts. Replace the parts that are damaged or worn. Put clean hydraulic oil on the parts of the bulldozer control valve. Put clean hydraulic oil in all bores of the valve body.

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Illustration 1	g00536430

2. Replace the O-ring seals on plugs (1), if necessary.

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Illustration 2	g00536434

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Illustration 3	g00536436

Note: Use a 1/4 inch -20 threaded rod to install valve assembly (2) in the control valve body.

3. Install valve assembly (2), spacer (3) and plug (4) on the control valve body.

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Illustration 4	g00536440

4. Install stem (5) in the original location on the valve body.

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Illustration 5	g00536448

5. Install the O-ring (8) on plug (9). Install piston (7) and plug (9) on housing (6) .

6. Install nut (11) on plunger (10) .

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Illustration 6	g00536454

7. Install O-ring seal (15) on housing (16). Install retainer (12), spring (13), and retainer (14) on housing (16) .

8. Install two screws (17) and plunger (10) on housing (16) .

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Illustration 7	g00536477

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Illustration 8	g00536479

Note: Housing (18) is assembled in the same manner as housing (16). Except, housing (18) has two springs. Perform steps 7 through 8 in order to assemble housing (18) .

Note: When you install the housings on the control valve body, housing (6) must be aligned so that piston (7) fits in the groove of stem (5) .

9. Position housings (18), (6), and (16) in the original location on the control valve body. Install two bolts (19) and the nuts on both ends of the valve body.

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Illustration 9	g00536484

10. Install spool (23) in the original location on the valve body.

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Illustration 10	g00536485

11. Install pin (26) in screw (29) .

12. Install plug (25), nut (28), and screw (29) on housing (24). Tighten nut (28) to a torque of 35 ± 6 N·m (26 ± 4 lb ft).

13. Install nut (27) on housing (24). Tighten nut (27) to a torque of 20 ± 6 N·m (15 ± 4 lb ft).

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Illustration 11	g00536489

14. Install O-ring seal (29) on seat (30). Install O-ring seal (35) on housing (24) .

Note: Spacers and shims (34) must be positioned so that the two spacers are on the outside of the shims. One of the spacers must contact spring (33) .

15. Install spacers and shims (34) on housing (24). Install spring (33), retainers (32), and valve (31) on housing (24) .

Note: To compensate for spring pressure, use longer bolts 1D-4585 to position housing (24) on the valve body. After positioning housing (24) on the valve body, replace the longer bolts with the original bolts.

16. Position spring (28), seat (30) and housing (24) in the original location on the valve body. Install two bolts (36) .

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Illustration 12	g00536496

17. Install spool (37) in the original location on the valve body.

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Illustration 13	g00536518

18. Install O-ring seal (42) on both housings (38) .

19. Install retainer (39), spring (40), washer (41), and housing (38) on both sides of the valve body.

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Illustration 14	g00536519

20. Install pin (46) in screw (48) .

21. Install plug (45), nut (47), and screw (48) on housing (44). Tighten nut (47) to a torque of 35 ± 6 N·m (26 ± 4 lb ft).

Note: Spacers and shims (52) must be positioned so that the two spacers are on the outside of the shims. One of the spacers must contact spring (51).

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Illustration 15	g00536521

22. Install spacers and shims (52) on housing (44). Install spring (51), retainers (50), and valve (49) on housing (44) .

23. Install nut (53) on housing (44). Tighten nut (53) to a torque of 20 ± 6 N·m (15 ± 4 lb ft).

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Illustration 16	g00536522

24. Install spool (54) in the original location in the valve body.

25. Position spring (55), seat (56) and housing (44) in the original location on the valve body. Install two bolts (57) .

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Illustration 17	g00536704

26. Position valve (60), spring (59) and plug (58) in the original location on the valve body.

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Illustration 18	g00536706

27. Install plug (64), spring (63) and plug (61) in the original location on the valve body.

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Illustration 19	g00536707

28. Position cover (66) in the original location on the valve body. Install two bolts (65) .

End By: Install the bulldozer control valve.