Disassemble Hydraulic Apply Wet Disc Brake; Disassemble Three Function Wet Disc Brake - JLG GRADALL 522D Owner's/Operator's Manual

Disassemble Hydraulic Apply
Wet Disc Brake
1. Remove piston return spring capscrews.
2. Remove return springs.
3. Remove brake piston assembly. Figure 2.9.
Figure 2.9
!
CAUTION
Ground oil seal surfaces must be properly
protected to avoid damage. Whenever necessary,
use No. 600 sandpaper to correct any damage.
4. If necessary, replace brake piston oil seals.
Figure 2.10.
Figure 2.10
5. Follow steps 1 through 4 to disassemble the
second brake piston.
Re m ova l a nd Disa sse m bly
Disassemble Three Function
Wet Disc Brake
NOTE
Do not disassemble brake piston unless
necessary.
1. Remove return spring capscrews with 4 mm
Allen wrench. Remove return springs and
washers. Figure 2.11.
Figure 2.11
2. Remove brake piston assembly from brake
housing as shown in Figure 2.12 or place brake
housing on a bench with the opening turned
down. Inject 80 psi (5.5 bar) compressed air
through inlet of service brake to eject brake
piston.
3. Remove shims.
Figure 2.12
Se c t ion 2
5
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