Komatsu 830E-AC Shop Manual page 614

15. Use a suitable tool to push the parking piston
out of the caliper housing.
16. Remove the 127 mm (5 in.) diameter O-ring (1,
Figure 6-11) and backup ring (2) from the park-
ing piston. Discard the O-ring and backup ring.
FIGURE 6-11. PARKING PISTON
1. O-Ring
2. Backup Ring
17. Use a suitable tool to remove the 63.5 mm (2.5-
in.) diameter parking piston O-ring (1, Figure 6-
12) and backup ring (2) from the caliper hous-
ing. Discard the O-ring and backup ring.
.
FIGURE 6-12. PARKING PISTON O-RING
1. O-Ring
J6-10
3. Parking Piston
4. Housing
2. Backup Ring
Armature Speed Rear Disc Brakes
18. Position the caliper housing so that the ends of
the adjuster pin and nut are up. Use a 5/32-inch
Allen wrench to hold the pin and remove the nut
and washer from the caliper housing.
19. Use a suitable dowel or drift to push the pistons
(1, Figure 6-13) out of each caliper housing.
FIGURE 6-13. SERVICE PISTONS
1. Piston Assembly
20. Use a suitable tool to remove the two service
piston dust seals (1, Figure 6-14) from the cali-
per housing. Discard the dust seals.
FIGURE 6-14. DUST SEALS
1. Dust Seal
2. Dust Seal
2. Groove
10/06 J06025