JLG 40RTS Service Manual - Manual (Page 51)

SECTION 2 - PROCEDURES
3120826 – JLG Sizzor – 2-35
12. Place cover assembly onto ring gear, aligning pipe
plug holes in cover and hub according to applicable
assembly print. Also, make sure shoulder bolt holes
in cover and ring gear are aligned.
13. Place four flat washers on top of bolt holes in cover
assembly.
14. Place shoulder bolts into four shoulder bolt holes in
cover and tighten by hand.
15. Place remaining twelve flat washers onto remaining
bolt holes in cover.
16. Place twelve bolts into remaining bolt holes in cover
and tighten.
17. Torque shoulder bolts to 25 - 34 Nm (18 - 25 ft. lbs.).
Torque bolts to 25 - 34 Nm (18 - 25 ft. lbs.).
18. Turn hub over on to its side. Insert coupling into end
of spindle.
19. Roll test unit in accordance with paragraph b in both
clockwise and counterclockwise directions. Perform
same number of turns in each direction as ratio of
unit. Ratio is last two digits of model number on
unit’s ID tag. For example, if model number is
W1BFF0335, then roll unit 35 times in each direc-
tion.
20. Leak test unit in accordance with paragraph c at a
pressure of 0.4 bar (5 psi) for 2-3 minutes.
2.25 DRIVE TORQUE HUB/BRAKE - 4WD
FRONT
TORQUE HUB UNITS SHOULD ALWAYS BE ROLL AND LEAK
TESTED BEFORE DISASSEMBLY AND AFTER ASSEMBLY TO
MAKE SURE THAT THE UNIT’S GEARS AND SEALANTS ARE
WORKING PROPERLY.
Disassembly
1. Remove pipe plug from cover and drain oil from unit.
2. Inspect spindle/brake as follows:
a. Examine two brake ports on bottom of spindle/
brake. Bottom of one is tapered and bottom of
other one is flat. Install hydraulic line of a hand
pump into flat brake port.
b. Install a bleeder valve into tapered brake port.
c. Insert roll checker into spindle/brake. If brake is
not working properly, roll checker should not
turn.
d. Set hand pump to “PUMP”.
e. Increase hydraulic pressure in brake by pump-
ing gradually. At the same time, try to turn roll
checker. If brake is set correctly, roll checker
should turn when pump pressure reaches 10-11
bar (140 - 160 psi).
f. Roll test brake in both clockwise and counter-
clockwise directions. Perform same number of
turns in each direction as ratio of unit. This num-
ber is the same as the last two digits of the
model number found on the unit’s ID tag. For
example, if unit’s model number is W1BJ4U318,
then it should be rolled 18 times in both direc-
tions.
g. Set hand pump to “RELEASE” and check to see
if brake has reset itself. If brake has reset roll
checker should not be able to turn.