JLG 450AJ Service Manual - Manual (Page 49)

SECTION 2 - PROCEDURES
3120869 – JLG Lift – 2-33
6. Place the assembled planet gear (11), large end
towards the roll pin onto the planet shaft (10).
7. Push the planet shaft (10) through until it reaches
the other side of the planet gear (11). Place the other
flat tanged washer (12) onto the shaft so that the
bump is on the internal side of the carrier, and is
lined up with the slot on the carrier.
8. Push the planet shaft (13) all the way through the
carrier (8) until the roll pin holes line up.
9. Using an alignment punch, align the roll pin holes in
the carrier (8) with the roll pin holes in the planet
shaft (10) and drive the roll pin (9) into the hole until
it is flush with the carrier housing.
10. Repeat steps 4 to 10 for the remaining two planet
gears.
11. At this point the carrier sub-assembly is complete.
Ring Gear/Cover Sub-Assembly
1. Grease and install O-Ring (5) into ring gear/cover
(4).
2. Place disengage cap (2) on ring gear/cover (4) with
the nipple facing out.
3. Fasten disengage cap (2) with two bolts (1). Torque
bolts to 8 - 9 Nm (70-80 in-lbs).
4. Insert disengage rod (3) into ring gear/cover (2).
5. Install pipe plugs (6) into ring gear/cover (4).
Hub-Spindle Sub-Assembly
NOTE: If your unit does not have studs, skip this step.
1. Place the hub with the large diameter up on a flat
surface. Using a bearing cup pressing tool press the
inboard cup (24) into the housing (16). Turn the unit
over.
2. Using a stud fixture and a hammer, carefully press
studs (15) into the housing (16). If there is not a stud
fixture available anything that can suspend the hous-
ing in the air can be used.
3. With the unit still in the fixture, press in the outboard
cup (24).
4. Place outboard bearing (23) into the outboard cup.
5. With the housing still in the stud fixture, with a seal
pressing fixture, press the seal (34) with the closed
face up into the small diameter of the housing.
6. Place spindle (21) on a flat surface with large diame-
ter down. Coat the seal shoulder with grease.
7. Place the hub onto spindle. Press bearing cone (23)
onto the spindle.
8. Press the inboard bearing cone (23) onto the spin-
dle until you get slight drag when rotating the hub.
9. Place the spacer (18) on the bearing cone. Install
retaining ring (17) onto spindle (21). Do not use
retaining ring pliers.
SAFETY GLASSES MUST BE WORN DURING THIS STEP.
10. Insert Spring (15) into spindle (1A) counterbore.
Place Spacer (16) on top of spring. Install retaining
ring (17) into spindle counterbore using retaining
ring pliers.
Main Assembly
NOTE: All components should receive a generous amount
of lubricant oil as they are being assembled.
1. Place hub-spindle sub-assembly on a flat surface.
2. Grease and install O-Ring (33) onto hub pilot.
3. Install retaining ring (32) onto input shaft (29) using
retaining ring pliers.
4. Install input shaft (29) into spindle (21).
5. Install internal gear (31) onto spindle (21) spline.
6. Place thrust washer (27) on spindle (21) pilot.
7. Place thrust washer (20) into spindle (21) counter-
bore.
8. Time the assembled carrier with the large diameter
of the cluster gears facing up. Make sure that all
three punch marks on the gears are in the 12 o’clock
position and secure the gear teeth.
9. Install the sun gear (28) into the cluster gears (11).
Be sure that the punch marks remain in their correct
location.