Komatsu 830E-AC Shop Manual page 172

6. Check the piston for a drilled orifice at the inside
face. If the piston contains the orifice, modify
the piston as shown in Figure 7-35.
7. Inspect clutch hub (29) for wear. Wear marks
that may be present on the teeth must not
restrict plate movement. If they have smooth
entry and exit ramps, the notches will not
restrict plate movement and the clutch hub may
be reused.
8. Check steel plates (31) for wear. The plates
must be smooth and free of grooves or heat
related damage. The plates are 3.07 mm (0.121
in.) minimum thickness when new and must be
flat within 0.13 mm (0.005 in.).
9. Inspect facing plates (30). Minimum thickness
for new facing plates is 2.77 mm (0.109 in.).
Grooves are 0.15 mm (0.006 in.) deep. The
plates must be flat within 0.13 mm (0.005 in.).
Check the teeth for excessive wear. When new,
the space between the teeth is approximately
7.11 mm (0.280 in.).
C7-18
FIGURE 7-35. PISTON REWORK
(For earlier pistons with the drilled orifice.)
10. Inspect fan mounting hub (42).
Fan Clutch
FIGURE 7-36.
C07001