JLG 500RTS ANSI Service Manual - Manual (Page 39)

SECTION 2 - PROCEDURES
3121103 – JLG Sizzor – 2-23
BEWARE OF SHARP EDGES IN COUNTERBORE WHEN INSTALL-
ING O-RING.
18. Set cover assembly on table, interior side up.
Grease o-ring and place it into counterbore around
edge of cover.
NOTE: O-ring may be stretched or pinched together to
make it fit counterbore exactly.
19. 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.
20. Place four flat washers on top of bolt holes in cover
assembly.
21. Place shoulder bolts into four shoulder bolt holes in
cover and tighten by hand.
22. Place remaining twelve flat washers) onto remaining
bolt holes in cover.
23. Place twelve bolts into remaining bolt holes in cover
and tighten.
24. Torque shoulder bolts to 18 - 25 ft lb (25 - 34 Nm).
Torque bolts to 18 - 25 ft lb (25 - 34 Nm).
25. Turn hub over on to its side. Insert coupling into end
of spindle.
26. Roll test unit in both clockwise and counter clock-
wise directions. Perform same number of turns in
each direction as ratio of unit. Ratio is last two digits
of model number on units ID tag. For example, if
model number is W1BFF0335, then roll unit 35 times
in each direction.
27. Leak test unit at a pressure of 5 psi (0.4 bar) for 2-3
minutes.
2.22 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 UNITS 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.
Figure 2-9. Torque Hub Carrier Timing