JLG GRADALL 522D Owner's/Operator's Manual page 135

2. While out of the axle, connect cylinder assembly
to hydraulic system. Apply 400 psi (27.6 bar)
pressure to compress spring until piston is against
brake cylinder. Repeat this operation four to five
times to make sure there is no leakage.
Figure 4.70.
Figure 4.70
!
CAUTION
Do not use brake fluid in the hydraulic system.
Use Shell Donax TD or Shell Tellus 32 or
equivalent.
3. Install brake cylinder assembly onto main
housing. Figure 4.71.
Figure 4.71
SUPPORT
CAPSCREW
Asse m bly a nd I nst a lla t ion
HYDRAULIC
PRESSURE
CYLINDER
CAPSCREW
4. While the cylinder is pressurized with 400 psi
(27.6 bar), apply liquid adhesive, Loctite 221 or
Three Bond 1341, on threads of brake shaft.
Install adjusting nut until it rests against piston.
DO NOT TIGHTEN ADJUSTING NUT. Loosen
the adjusting nut one full turn. Figure 4.72.
Figure 4.72
ADJUSTING NUT
RETURN 1 LAP
5. Release cylinder pressure to ZERO so piston
returns back against adjusting nut. Check
dimension "X" as shown in Figure 4.73.
Figure 4.73
ADJUSTING NUT
If dimension "X" is smaller than 1.47 inch (37.0
mm), tighten adjusting nut until the dimension is
reached. If dimension gets larger, unfasten the
nut. This adjustment must be made with piston
activated.
Se c t ion 4
BRAKE SHAFT
HYDRAULIC
PRESSURE
BRAKE SHAFT
"X"=
1.47 inch
(37.0 mm)
WITHOUT
PRESSURE
45
Courtesy of Crane.Market