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

SECTION 2 - PROCEDURES
3120696 – JLG Sizzor – 2-23
8. Remove thrust washer from carrier assembly.
9. Remove thrust spacer from input shaft assembly.
10. Remove ring gear from mesh with carrier assembly.
11. Remove carrier assembly from hub.
12. If necessary, disassemble carrier assembly as fol-
lows:
a. Locate roll pin in carrier housing. Drive roll pin
down into planet shaft until it bottoms against
carrier housing. If roll pin is not completely
driven into planet shaft, damage to carrier could
occur when shaft is removed.
b. Drive roll pin out of planet shaft. Roll pin must
come out through side of planet shaft that it orig-
inally went into.
c. Remove planet shaft from carrier housing. Two
tongued thrust washers and cluster gear will
slide off.
d. Remove needle rollers and spacer from inside
cluster gear.
e. Repeat steps (a) through (d) to remove two
remaining cluster gears.
13. Remove input gear from input shaft assembly.
14. Remove thrust spacer from input shaft assembly.
15. Remove input shaft assembly from spindle/brake.
16. If necessary, disassemble input shaft as follows:
a. Remove retaining ring from input shaft.
Discard retaining ring.
b. Slide thrust spacer, spring, and other
thrust spacer off of input shaft.
17. Remove thrust washer from bottom of internal gear.
18. Remove internal gear from hub.
19. Remove o-ring from counterbore in hub. Discard o-
ring.
20. Using a screwdriver or chisel and hammer,
straighten out tang on lock washer which has been
bent into notch in locknut.
21. Using an N-13 locknut wrench (tool no. T-141863),
loosen locknut. Remove locknut from spindle/brake
and discard.
22. Remove lock washer from spindle/brake and dis-
card.
23. Remove tongued washer from spindle/brake.
24. Lift bearing cone out of hub.
25. Lift hub off of spindle/brake.
26. Using a slide hammer, remove seal from small end
of hub. Discard seal.
27. Lift bearing cone off of spindle/brake.
28. Using a soft punch and hammer, remove bearing
cup from deep end of hub.
NOTE: When using punch, be very careful not to strike
counterbore of hub where cup is located.
29. Using a soft punch and hammer, remove bearing
cup from shallow end of hub.
NOTE: This cup can be reached by putting punch into small
access hole in bottom of hubs deep end.
30. Remove two pipe plugs from pipe plug holes in side
of hub.
31. Remove two magnetic pipe plugs from pipe plug
holes in flange of hub.
32. Hammer out nine wheel studs.
Roll Test
The purpose of a roll test is to determine if the units gears
are rotating freely and properly. Gears should be able to
be rotated by applying a constant force to the roll checker.
If more drag is felt in the gears only at certain points, then
the gears are not rolling freely and should be examined for
proper installation or defects. Some gear packages roll
with more difficulty than others. Do not be concerned if
gears seem to roll hard as long as they roll with consis-
tency.
Leak Test
The purpose of the leak test is to make sure the unit is air
tight. The unit has a leak if the pressure gauge reading on
the air checker starts to fall once the unit has been pres-
surized. Leaks will most likely occur at main seal or wher-
ever o-rings or gaskets are located. The exact location of
a leak can usually be detected by brushing a soap and
water solution around the main seal and where o-rings or
gaskets meet the exterior of the unit, then checking for air
bubbles. If a leak is detected in a seal, o-ring, or gasket,
the part must be replaced.
Assembly
1. Grease o-ring.
2. Place o-ring into counterbore in hub.
BEWARE OF SHARP EDGES AND BURRS IN COUNTERBORE
WHEN INSTALLING O-RING.