JLG 450AJ Service Manual User Manual
Page 50
SECTION 2 - PROCEDURES
2-34
– JLG Lift –
3120869
10.
Install carrier sub-assembly with sun gear (28) onto
input shaft (29) and into internal gear (31). Rotate
the carrier to insure that the timing is correct.
11.
Place second washer (27) into the counterbore of
the carrier(8).
12.
Install Ring gear/cover (4) sub-assembly onto the
hub making sure that the holes on the ring gear/
cover (4) match up with the holes on the hub.
13.
Secure ring gear/cover (4) to hub using three hex
socket screws (7). Torque screws 20 - 27 Nm (15-20
ft-lbs).
14.
Install retaining ring (26) into coupling (25) using
retaining ring pliers.
15.
Insert coupling (25) into spindle (21) counterbore.
16.
Roll check unit. To do this, you would turn the num-
ber of turns in each direction that the unit is being
reduced. For example a 19 to 1 reduction would
require 19 turns to the left and 19 turns to the right.
17.
Air check unit by plugging up the input diameter of
the spindle and filling the unit with air. If the unit
retains all of the air after 15 minutes then it is good.
2.18 TORQUE HUB (S/N 39594 TO PRESENT)
NOTE: All index number references in parentheses in the
following paragraphs are in reference to Figure 2-
29., Torque Hub (S/N 39594 to Present) - Cutaway
View
Main Disassembly
18.
Turn hub (1G) over on its side. Remove coupling
(14) from the wide end of the spindle (1A).
19.
Mark the location of the shoulder bolt holes on out-
side of ring gear and hub for easy re-alignment
when rebuilding. Remove the four shoulder bolts
(13) and twelve bolts (12) from cover (6).
20.
Remove the 16 flatwashers (16) from cover (6).
21.
Lift cover sub assembly (6) off of ring gear (4), and
set cover on the table, interior side facing up.
BEWARE OF SHARP EDGES IN THE COUNTERBORE WHEN
REMOVING THE O-RING.
22.
Remove o-ring (5) from the counterbore around the
edge of cover (6A). Discard the o-ring.
NOTE: If o-ring is not in the cover counterbore, it is in the
ring gear counterbore. Remove it from the hub and
discard it.
23.
Remove thrust washer (11) from the counterbore in
top of carrier (3A).
24.
Remove input gear (8) from the middle of carrier
sub-assembly.
25.
Lift ring gear (4) off of hub (1G).
26.
Lift carrier sub-assembly (3) out of hub (1G).
27.
Remove the thrust spacer (9) from input shaft (7) in
the middle of spindle (1A).
28.
Lift input shaft sub-assembly (7) out of middle of
spindle (1A), and stand input shaft (7A) on its
splined end.
WEAR SAFETY GLASSES DURING THIS STEP BEING AWARE
THAT SPRING AND SPACERS COMPRESSED BY RETAINING
RING MAY POP SUDDENLY OFF SHAFT WHEN REMOVING THE
RETAINING RING.
29.
Using retaining ring pliers, remove the retaining ring
(7B) from the groove on the input shaft (7A).
30.
Remove one spacer (7D), one spring (7C), and
other spacer (7D) from input shaft (7A) on its splined
end.
31.
Remove thrust washer (11) from around spindle
(1A).
32.
Lift internal gear (2) out of hub (1G).
BEWARE OF SHARP EDGES IN THE COUNTERBORE WHEN
REMOVING THE O-RING.
33.
Remove o-ring (5) from the counterbore in hub (1G).
Discard o-ring.
Hub-Spindle Disassembly
NOTE: Start with the large end of hub facing up, large end of
spindle facing down.
WEAR SAFETY GLASSES DURING STEP ONE.
1.
Remove retaining ring (1I) from around spindle (1A)
in hub (1G).
2.
Remove spacer (1H) from around the spindle (1A) in
hub (1G).