JLG 600A_AJ Service Manual - Manual (Page 53)

SECTION 3 - CHASSIS & TURNTABLE
3121201 – JLG Lift – 3-3
THE BRAKE TEST
Reference: Sample Model 7HBE01F0B30057. The under-
lined letter is the brake option. Options are A, B, C, D, E,
or X.
If brake does not release at these pressure values, brake
has to be inspected, repaired or replaced.
NOTE: Failure to perform this test may result in damaged or
ineffective brake parts.
Tightening and Torquing Bolts
If an air impact wrench is used to tighten bolts, extreme
care should be taken to ensure that the bolts are not tight-
ened beyond their specified torque.
The following steps describe how to tighten and torque
bolts or socket head cap screws in a bolt circle.
1. Tighten (but do not torque) bolt "A" until snug.
2. Go to the opposite side of the bolt circle and tighten
bolt "B" until equally snug.
3. Crisscross around the bolt circle and tighten remain-
ing bolts.
4. Now use a torque wrench to apply the specified
torque to bolt "A".
5. Using the same sequence, crisscross around the
bolt circle and apply an equal torque to the remain-
ing bolts.
Main Disassembly
1. Perform Roll Check, Leak Check and Brake Check if
applicable prior to disassembling the unit.
2. Drain oil from unit. Note the condition and volume of
the oil.
3. Remove Retaining Ring (6G) by prying the open end
of Retaining Ring out of the groove in the Ring Gear
(1E) with a screwdriver, then grasp the loose end
with pliers and pull the Retaining Ring completely
out of the groove.
4. Remove the Cover Subassembly (6) from the unit.
The unit can be carefully pressurized with air to pop
the cover out of the unit.
A Input Brake 2,200 in-lb (248 Nm) Static, 280 psi (19.3 bar) Full
Release 3000 psi (207 bar) maximum o-ring check.
B Input Brake 1,900 in-lb (215 Nm) Static, 240 psi (16.5 bar) Full
Release 3000 psi (207 bar) maximum o-ring check.
C Input Brake 1,600 in-lb (181 Nm) Static, 200 psi (13.8 bar) Full
Release 3000 psi (207 bar) maximum o-ring check.
D Input Brake 1,400 in-lb (158 Nm) Static, 180 psi (12.4 bar) Full
Release 3000 psi (207 bar) maximum o-ring check.
E Input Brake 1,250 in-lb (141 Nm) Static, 160 psi (11.0 bar) Full
Release 3000 psi (207 bar) maximum o-ring check.
X — No Brake