Komatsu 830E Shop Manual page 471

9. Piston shoes must pivot smoothly, but end play
must not exceed 0.003 in (0.076 mm).
10. Check end play as follows:
a. Place square end of piston on bench and
hold down firmly. Pull on end of shoe with
other hand and note end play. A good pis-
ton/shoe fit will have no end play, but the
shoe may rotate and pivot on the piston
ball. Inspect each shoe face for nicks or
scratches.
1. Plug
2. O-Ring
3. Capscrew
4. O-Ring
5. Plug
6. O-Ring
7. Plug
8. Valve, 4-Way
L05026
FIGURE 5-24. PUMP, REAR HOUSING
9. Capscrew
10. Orifice
11. O-Ring
12. Plug
13. Compensator
14. Valve, Relief
15. Bearing
16. Gasket
Steering Component Repair
b. Measure shoe thickness (the part held
between retainer (27, Figure 5-24) and cra-
dle. All shoes must be equal within 0.0001in
(0.003 mm). If one or more piston/shoe
assemblies (13) needs to be replaced, all
piston/shoes assemblies must be replaced.
c. Inspect cylinder bearing (26) and matching
cylinder barrel bearing mating surface for
galling, pitting or roughness. Replace if nec-
essary.
17. Valve Plate
18. O-Ring
19. Cover Plate
20. Capscrew
21. Capscrew
22. O-Ring
23. Back-up Ring
24. Cap
25. O-Ring
26. O-Ring
27. O-Ring
28. O-Ring
29. Unloader Module
30. Orifice
31. Capscrew
L5-27