Komatsu 830E-AC Shop Manual page 625

Piston Subassembly
1. Install inner spring guide (10, Figure 6-25) into
the piston cavity.
2. Install adjuster pin (8) with the adjuster assem-
blies installed onto the adjuster pin.
3. Install outer spring guide (7).
4. Install return spring (6).
5. Install spring retainer (5).
6. Position the piston assembly onto an arbor
press table as shown in Figure 6-16. Use spe-
cial sleeve A shown in Figure 6-26 over the
adjuster pin. Position the threaded ring over the
special sleeve.
7. Slowly lower the arbor and compress the return
spring to minimum height, and hold.
FIGURE 6-25. PISTON SUBASSEMBLY
1. Lock Ring
2. Threaded Ring
3. O-Ring
4. Adjuster Pin Washer
5. Spring Retainer
6. Return Spring
J06025 10/06
7. Outer Spring Guide
8. Adjuster Pin
9. Adjuster
10. Inner Spring Guide
11. Piston
Armature Speed Rear Disc Brakes
8. Screw the threaded ring against the spring
retainer, using a spanner wrench to ensure that
the threaded ring is bottomed. Holding the
spring compressed, back off the threaded ring
one full turn, plus the additional amount needed
to install the lock ring into the first available lock
ring position.
NOTE: This procedure provides the required built-in
clearance (BIC).
9. Raise the arbor, remove the piston assembly
from the arbor press, and install the lock ring.
FIGURE 6-26. SPECIAL SLEEVES
J6-21