
7
8. Install both control valve springs in control valve bore
and install cover and retaining ring.
Slave Piston
1. Remove lock nut from slave piston adjusting screw.
2. Loosen slave piston adjusting screw until slave piston
seats on bottom of bore.
Figure 5-7
CAUTION
When removing slave pistons wear eye protection
and use proper tools. Slave piston springs are highly
compressed and may cause serious personal injury
if not removed with caution.
3. Install slave piston spring removal tool as illustrated.
Turn tool screw until all force is removed from spring
retainer.
4. Using retaining ring pliers, orient the retaining ring
end near slot in brake housing.
5. Compress the retaining ring with the retaining ring
pliers and remove it from the groove in the housing.
Figure 5-8
6. Loosen screw in spring removal tool slowly and carefully
to remove the spring tension. Remove the retainer, springs
and slave piston.
7. Check slave piston outside diameter ground surface
for burs or defects.
8. Clean all parts with approved solvent and lubricate
with engine oil.
Figure 5-9
9. Insert piston in bore. Piston must slide in bore without
binding. Replace if binding occurs.
10. Reassemble all parts in reverse order from
disassembly procedure.
11. Before removing the slave piston spring removal tool,
be sure the retaining ring is fully seated in the groove. Rotate
retaining ring 90
o
away from the slot in brake housing.
Master Piston
Figure 5-10
1. Remove button head screw, washer and flat spring from
brake housing.
2. Remove master piston from bore.
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