Assemble Ball And Ramp Brakes, Brake Discs, Reaction Plate And Pins - JLG GRADALL 522D Owner's/Operator's Manual

Se c t ion 4
Asse m bly a nd I nst a lla t ion
14. With piston still compressed, apply 350 psi
(24 bar) into parking brake to make sure oil
seals fit in bores. Figure 4.61.
Figure 4.61
350 PSI (24 BAR)
15. Keep the parking brake under 350 psi (24 bar)
pressure and remove the manual press and
guide pins.
16. Apply medium torque liquid adhesive, Loctite
241 or Three Bond 1334, to return spring holes
and bolt threads. Install return springs, washers
and return spring bolts into brake housing.
Tighten bolts to 80-115 lb-in (9-13 N•m).
Figure 4.62.
T
Figure 4.62
350 PSI
(24 BAR)
NOTE
Use same procedure to install other brake piston
assemblies into main housing.
42
BOLT
WASHER
SPRING
Assemble Ball and Ramp
Brakes, Brake Discs, Reaction
Plate and Pins
1. Install sun gear. Figure 4.63.
Figure 4.63
NOTE
After assembly, friction disc lubrication holes
must be perfectly aligned.
2. Install friction and stationary discs alternately.
Make sure friction disc is against brake piston.
3. For ball and ramp brakes, discs must be installed
alternately and a friction disc must be on each
side of the expansive plate. Figure 4.64.
Figure 4.64
REACTION PLATE
EXPANSIVE PLATE
PIN
STATIONARY DISC
SPACER
FRICTION DISC
FRICTION DISC
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