MAJOR SUSPENSION REBUILD
Disassembly
NOTE: Refer to your Komatsu Distributor for HY-
DRAIR
®
II repair information and instructions not cov-
ered in this manual.
1. With suspension held in a vertical position (end
cap up), remove capscrews (1, Figure 2-7) and
hardened washers (2). Attach hoist to end cap
structure (16) and lift end cap out of suspension
housing (6) until piston stop (12) contacts upper
bearing retainer (5). Remove capscrews (3) and
hardened washers (4). Lift cap structure and
bearing from housing.
2. Remove roll pin (10), nut (11), piston stop (12) and
key (13). Separate cap and bearing. Remove
O-rings and backup rings (15). Remove bearing
(14).
3. Rotate the suspension 180
o
.
NOTE: Steel balls (9) will fall free when the housing is
rotated.
4. Attach lifting device to the piston (7) and carefully
lift out of housing.
5. Remove capscrews and washers (20 & 21, Figure
2-8). Install pusher bolts and remove lower bear-
ing retainer (18).
6. Remove and discard rod seal (28) step seal (27)
and rod wiper (29). Remove and discard O-rings
(22) and backup rings (23). Remove lower bear-
ing (24).
1. Housing
2. Cap Structure
3. Capscrew
4. Hardened Washer
5. O-Ring
6. Backup Ring
7. Capscrew
8. Hardened Washer
9. Charging Valve Assy.
10. Vent Plug
11. Plug (Pressure Sensor Port)
12. Upper Bearing Retainer
13. Piston Stop
14. Nut
15. Roll Pin
16. Steel Check Ball
17. Piston
18. Lower Bearing Retainer
19. Plug
20. Capscrew
21. Hardened Washer
22. O-Ring
23. Backup Ring
24. Lower Bearing
25. Key
26. Upper Bearing
27. Step Seal
28. Rod Seal
29. Rod Wiper
FIGURE 2-8. FRONT SUSPENSION
H2-6 Front Suspensions H02013 2/01
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