Komatsu 830E Shop Manual page 500

FIGURE 8-12. HOIST PILOT VALVE
1. Snap Ring
2. Ball (4)
3. Detent Pin
4. Spring
5. Spacer
6. Capscrew
7. Outlet Housing
8. Nut
9. Tie Rod
10. Nut
11. O-Ring
12. O-Ring
13. Wiper
14. Spool
L8-8
15. Machine Screw
16. Seal Plate
17. Spool Housing
18. Inlet Housing
19. Spring Seat
20. Spring
21. Ball (1)
22. Detent Sleeve
23. Spacer
24. Cap
25. Seal Retainer
26. Wiper
27. O-Ring
Hoist Circuit Component Repair
3. Remove snap ring (1, figure 8-12), capscrews
(6), cap (24), spacer (23), and detent sleeve
(22). Detent Balls (2) and (21) will fall free when
the cap and detent sleeve are removed. Sepa-
rate cap (24), spacer (23) and detent sleeve
(22), as this will be necessary for reassembly.
4. Carefully slide the spool (14) out of the spool
housing (17). Remove seal retainer (25), wiper
(26) and O-ring (27) from spool (14).
5. Insert a rod in the cross holes of the detent pin
(3) and unscrew from spool (14). Slight pres-
sure should be exerted against the detent pin
as it disengages and spring tension is released.
6. Remove spring seats (19), spring (4) and spacer
(5).
7. Remove relief valve (2, Figure 8-13) from the
spool housing (1).
8. Match mark the inlet and outlet housings in rela-
tionship to the spool housing to insure correct
location during reassembly.
9. Remove nuts (8) and (10) and remove tie rods
(9). Separate the valve housings. Remove O-
ring (11). Remove the poppet check and spring
from the spool housing which are located on the
outlet housing side of the spool housing.
FIGURE 8-13. RELIEF VALVE
1. Valve Housing 2. Relief Valve
L08031