Cleaning and Inspection. - TM-10-3930-624-340095

KEY to fig 5-10:

22. Screw

1. Nut

23. Cap

2. Washer

24. Capscrew

3. Locknut

25. Seat

4. Washer

26. Spring

5. Plug

27. Seat

6. Plug

28. Plate

7. Preformed packing

29. Seat

8. Adjusting screw

30. Ring

9. Spring

31. Capscrew

10. Guide

32. Plate

11. Sleeve

33. Seat

12. Poppet

34. Ring

13. Backup ring

35. Plunger

14. Preformed parking

36. Plug

15. Plug

37. Preformed packing

16. Preformed packing

38. Spring

17. Spring

39. Poppet

18. Nut

40. Plug

19. Stud

41. Preformed packing

20. Cap

42. Housing

21. Plunger

(3) Remove the sleeve assembly (8 through

(2) Place poppet (12), spring (9) and guide

(10) in the upper end of the sleeve (11).

(1) from the valve housing. Remove the adjusting

(3) Install the spring (17) in the valve housing

screw (8), spring (9) and guide (10) from the sleeve

(42), install a new preformed packing (16) on the

(11). Remove the poppet (12), backup ring (13)

plug (15), and screw the plug into the valve body.

and preformed packing (14).

(4) Install the sleeve (11) and adjusting screw

(4) Remove the plug (15), preformed packing

(8), add a new preformed packing (7) on the relief

(16) and spring (17).

plug (5). Turn the plug until it is seated and sealed.

(5) Remove the nut (18), stud (19) and cap

(20). Remove the lift plunger (21).

Tighten the lower plug (6).

(5) Install the locknut (3) and washer (4), add

(6) Remove the screws (22), cap (23), cap-

the cap nut (1) and washer (2).

screw (24), spring seat (25), spring (26), spring

(6) Place new seals (29) and rings (34) into

seat (27), plate (28), seat (29) and ring (30).

the valve housing (42). Install the plungers (2) and

Remove the capscrews (31), plate (32), seat (33),

35) into the proper bores.

ring (34) and tilt plunger (35).

(7) Install the seal plates (32) and screws (31).

(7) Remove the check valve plug (36),

(8) Install the seal plates (28), seats (27), and

preformed packing (37), spring (38) and poppet

springs (26) and reinstall the special capscrew (24).

(39).

(9) Install the caps (20 and 23) and screws

(8) Remove the plugs (40) and preformed

(22).

packings (41) from the valve housing (42).

c. Cleaning and Inspection.

(10) Place new preformed packing (37) on

(1) Clean all parts with cleaning solvent and

plug (36).

(11) Install poppet (39), spring (38) and plug

dry thoroughly.

(36) into the valve body (42). Make sure that the

(2) Inspect the springs for cracks, wear,

plug is tight.

deformation or signs of weakness.

(12) Place new preformed packings (41) on

(3) Discard all seals.

plugs (40) and install into the valve body.

(4) Inspect all machined surfaces for cracks,

e. Installation.

nicks, scratches, gouges or other damage which

(1) Install the control valve on the truck with

could cause internal or external leakage.

the mounting hardware.

(5) Inspect all housings for cracks, stripped

(2) Reconnect the control linkages to the

threads or other damage which could affect

control valve plungers. (fig. 5-9.) Connect

operation.

(6) Inspect the plungers and plunger bores for

hydraulic lines.

f. Relief Valve Adjustment.

scoring, chips, nicks, cracks or other damage which

could result in internal or external leaks.

(1) Remove cap nut (1, fig. 5-10), washer (2)

and locknut (3) from the relief valve.

(7) Replace all seals and any defective parts.

d. Reassembly. (fig. 5-10.)

(2) Using a screwdriver, turn down the pilot

poppet adjusting screw (8) until it is snug against

( 1 ) P l a c e a new backup ring (13) and

the pilot poppet.

preformed packing (14) on the poppet (12). Place

into lower end of sleeve (11).

5-11