D6D TRACTOR POWER TRAIN – Steering Clutch Hydraulic Control Valve (Power Shift)

Remove Steering Clutch Hydraulic Control Valve (Power Shift)

Start By:

a. remove fuel tank

NOTE: The cab is tilted back for better photo illustration of the steering clutch hydraulic control valve.

1. Move air conditioner hoses (1) away from the steering clutch hydraulic control valve if so equipped.

2. Disconnect steering clutch control rod assemblies (2) from the levers on the valve.

3. Disconnect tube assemblies (3), (4), and (6). Disconnect hose assembly (5).

4. Remove two bolts (7) that hold each elbow on the valve to the bevel gear case.

5. Remove four bolts (9) that hold the valve to the bevel gear case. Remove steering clutch hydraulic control valve (8).

6. Remove five O-ring seals (10). Check the condition of the seals. If the seals are damaged, use new parts for replacement.

7. Coat the o-ring seals with clean oil and install in the steering clutch hydraulic control valve in reverse order.

8. If necessary, make an adjustment to the steering clutch linkage. See Adjustment of the Linkage for the Steering Clutches, in Specifications.

End By:

a. install fuel tank

Disassemble And Assemble Steering Clutch Hydraulic Control Valve

Start By:

a. remove steering clutch hydraulic control valve (direct drive and special application)

b. remove steering clutch hydraulic control valve (power shift)

NOTE: The disassembly and assembly of the steering clutch hydraulic control valve for the direct drive, special application and power shift machines are the same. The only difference is the housing assembly for the valve.


NOTICE

Keep all parts clean from contaminants. Contaminants put into the system may cause rapid wear and shortened component life.


1. Remove O-ring seals (1).

2. Remove five bolts (2).

3. Remove bolt (4). Hit the end of shaft (3) in toward the housing to remove the plug from the end of the housing.

4. Remove ring (5) and key (6). Remove shaft (3), lever (7) and the washer.

5. Remove bolt (11). Hit the end of shaft (9) in toward the housing to remove the plug in the end of the housing.

6. Remove the ring and key from the shaft. Remove shaft (9), lever (10) and washer (8).

7. Use tool (A) and remove the two seals and four bearings (12).

8. Remove gasket (13) from housing (15). Check the condition of the gasket. If the gasket is damaged, use a new part for replacement.

------ WARNING! ------

When bolt (14) is removed, the valves in the housing are under tension from the springs on the valve. The valves will move out of the housing approximately 38.1 mm (1.5 in.) before the tension is released.

--------WARNING!------

9. Remove bolt (14) and the washer.

NOTE: As the valves are removed from the housing, put identification on the parts for correct installation.

10. Remove plunger (16), bushing (17), spring (18) and washer (19). Remove valve assembly (20). Remove the ring from plunger (16).

11. Remove plunger (21), bushing (22), spring (23) and washer (24). Remove valve assembly (25). Remove the ring from plunger (21).

12. Disassemble valve assemblies (20) and (25) as follows:

a. Remove snap ring (32), washer (31) and spring (30) from valve (29).

b. Remove slug (28), piston (27) and spring (26) from valve (29).

13. Remove spiral rings (34) and plugs (33). Remove the O-ring seals from the plugs. Check the condition of the seals. If the seals are damaged, use new parts for replacement.

NOTE: The following steps are for the assembly of the steering clutch hydraulic control valve.

14. Install the O-ring seals on plugs (33). Put clean oil on the seals. Install the plugs in the housing. Install spiral rings (34) to hold the plugs.

15. Assemble the two valve assemblies for the steering clutch hydraulic control valve as follows:

a. Put clean oil on all the parts of the valves.

b. Install springs (30) and washers (31) on valves (29). Install snap rings (32).

c. Install slugs (28) and pistons (27) in valves (29). Install springs (26).

16. Put clean oil in the bores in the housing.

17. Install valve assembly (20). Install washer (19), spring (18) and bushing (17). Install the ring on plunger (16). Install the plunger in bushing (17).

18. Install valve assembly (25). Install washer (24), spring (23) and bushing (22). Install the ring on plunger (21). Install the plunger in bushing (22).

19. Push the two valve assemblies into the housing until bolt (14) can be installed.

20. Use tool (A) and install four bearings (12). Install the bearings until they are even with the counterbores in the housing.

21. Install the two seals in the housing with tooling (A). Install the seals with the lips toward the inside of the housing and until they make contact with the bottom of the counterbores in the housing. Put clean oil on the lip of the seals.

22. Slide the longest shaft (9) through the seal in the rear hole in the housing. While the shaft is put in position, install washer (8) and lever (10) as shown.

23. Install the plug in the end of the housing over the end of the shaft (9) with tooling (A). The plug will put shaft (9) in the correct position in the housing.

24. Install key (6) in shaft (9). Slide lever (10) over the key. Install the bolt that holds the lever in position on the shaft.

25. Slide shaft (13) through the plug hole in the housing. As the shaft is put in position, install the washer and lever (7).

26. Install the key for lever (7) in the shaft. Install the lockring in the groove on the shaft.

27. Put the shaft in position in the housing and install the plug in the end of the housing with tooling (A). Install bolt (4) that holds lever (7) in position.

28. Put the gasket in position on the housing. Put the two housings together and install the five bolts that hold them together.

29. If O-ring seals (1) were removed, install new O-ring seals.

End By:

a. install steering clutch hydraulic control valve (power shift)

b. install steering clutch hydraulic control valve (direct drive and special application)

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