Gradall 534C-10 (2460-4129) Service Manual - Manual (Page 134)

46
Section 4
Assembly and Installation
8. Install cover. Figure 4.75.
9. The dimension “Y” must be equal with ± 0.02 inch
(0.5 mm) on each side. If dimension is larger on
one of the sides after adjustment, disassemble
and find the cause.
NOTE
Do not check the brake torque before the wheel
has turned at least two times with the brake
activated.
Figure 4.74
Figure 4.75
LOCK NUT
ADJUSTING
NUT
WITHOUT
PRESSURE
“X”=
1.47 inch
(37.0 mm)
DIM. “Y”
ADJUSTING NUT
SPRING
PISTON
O-RING
CYLINDER
SUPPORT
CYLINDER
WITHOUT
PRESSURE
O-RING
LOCK NUT
COVER
6. After 1.47 inch (37.0 mm) dimension is obtained,
apply specified pressure to brake and check the
brake torque on pinion as shown in chart.
Torque Disc Pressure Torque
Reduction No.
PRA-382 06 275 psi min 950-1200 lb-ft
17.08:1 (19 bar min) (1288.0-
1559.0 N•m)
PRA-353 06 275 psi min 350-500
46.00:1 (19 bar min) (474.5-
678.0 N•m)
NOTE
To obtain the desired brake torque, fasten or
unfasten the adjusting nut. For each 0.04 inch
(1 mm) turned on dimension “X”, the variation in
torque is 4%.
7. After obtaining the desired brake torque, install nut
lock as shown in Figure 4.74. Tighten to 60-90
lb-in (80-120 N•m).
T