JLG GRADALL 522D Owner's/Operator's Manual page 131

!
WARNING
To avoid serious personal injury, be careful when
using Loctite. Follow the manufacturer's
instructions for safe use to prevent irritation to
eyes and skin. Wash after skin contact. If the
Loctite gets in eyes, flush with water for 15
minutes. Have eyes checked by a doctor.
8. Apply medium torque liquid adhesive, Loctite 241
or Three Bond 1334 in threaded external piston
bolt holes. Install action plate bolts as shown in
Figure 4.57 and apply a pretorque of 30 lb-in
(3.3 N•m). Tighten to specified torque of
120-140 lb-in (13.5-16 N•m).
Figure 4.57
4
9. Install three larger oil seals into outer piston. Make
sure the oil seals fit in the bores. Figure 4.58.
Figure 4.58
LARGER OIL SEALS
Asse m bly a nd I nst a lla t ion
10. Install shim pack into brake housing. Use bolts
T
1
11. Remove guide bolts and manually install brake
3
12. Use bolts as guide and align piston and holes.
2
Figure 4.60
13. With a manual press on brake housing, apply
to align holes. Figure 4.59.
Figure 4.59
GUIDE BOLTS
SHIMS
piston assembly into brake housing. Rotate
piston assembly 15 to 20 degrees. The rotation
must be easy and without resistance. If there is
any resistance, disassemble the brake piston
assembly and find the cause.
Use marks made during disassembly as
reference. Figure 4.60.
pressure to brake piston until the springs
compress. Make sure oil seals fit in bores.
Figure 4.60.
Se c t ion 4
41
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