JLG G6-42P Service Manual - Manual (Page 337)

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Section 4
Assembly and Installation
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.
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 4.70
HYDRAULIC
PRESSURE
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.
5. Release cylinder pressure to ZERO so piston
returns back against adjusting nut. Check
dimension “X” as shown in Figure 4.73.
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.
Figure 4.71
Figure 4.72
CYLINDER
CAPSCREW
SUPPORT
CAPSCREW
BRAKE SHAFT
ADJUSTING NUT
RETURN 1 LAP
HYDRAULIC
PRESSURE
Figure 4.73
BRAKE SHAFT
ADJUSTING NUT
WITHOUT
PRESSURE
“X”=
1.47 inch
(37.0 mm)