Pump, Rear Housing - Komatsu 930E-2 Shop Manual

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 piston/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. Capscrew
2. O-Ring
3. Plug
4. Cap
5. Back-Up Ring
L6-18
FIGURE 6-15. PUMP, REAR HOUSING
6. O-Ring
7. Capscrew
8. Capscrew
9. Cover Plate
Steering Circuit Component Repair
b. Measure shoe thickness (the part held between
retainer (27, Figure 6-14) and cradle. All shoes
must be equal within 0.0001 in. (0.003 mm). If
one or more piston/shoe assemblies (13)
needs to be replaced, all piston/shoes assem-
blies must be replaced.
c. Inspect cylinder bearing (26) and matching
cylinder barrel bearing mating surface for gall-
ing, pitting or roughness. Replace if necessary.
10. O-Ring
11. Valve Plate
12. Gasket
13. Bearing
L06021