JLG 120HX ANSI Service Manual - Manual (Page 58)

SECTION 2 - PROCEDURES
2-38 – JLG Lift – 3120686
Assembly
1. If necessary, assemble the hub/spindle assembly (1)
as follows:
a. With large open end of hub (107) up, press
bearing cup (103) into hub. If no press is avail-
able, bearing cup may be frozen and tapped into
place with a non-metallic faced hammer.
b. Turn hub over, small diameter up. Install two
pipe plugs (110) into hub.
c. Press bearing cup (103) into small diameter end
of hub. If no press is available, bearing cup may
be frozen and tapped into place with a non-
metallic faced hammer.
d. Install bearing cone (104) into bearing cup.
e. Press seal (102) into hub counterbore with flat
metal side facing out. Use a flat object to ensure
that seal is pressed evenly and is flush with hub
face.
f. Lower hub onto spindle (101) with large open
end up.
g. Place bearing cone (104) over end of spindle
and into bearing cup.
h. Place bearing shim (105) over end of spindle
and against bearing cone.
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING
INSTALLATION.
i. Secure retaining ring (106) completely into spin-
dle groove and against bearing shim. Ensure
retaining ring is entirely in groove.
j. Install retaining ring keeper ring (21) in location
around retaining ring and on bearing spacer.
k. With large open end of hub/spindle assembly
facing up, place one spacer washer (7) into spin-
dle counterbore.
l. Place spring (8) into spindle counterbore.
m. Set second spacer washer (7) on top of spring.
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING
INSTALLATION.
n. Compress spacer washer and spring into spin-
dle counterbore and install retaining ring (9) into
spindle groove.
2. Position hub/spindle assembly (1) with large open
end up.
3. Lower internal gear (2) onto spindle.
4. Place one thrust bearing (16) between two thrust
washers (15) and place them onto spindle pilot.
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING
INSTALLATION.
5. Install retaining ring (10) in groove of input shaft
(11).
6. Place input shaft into spindle counterbore of hub/
spindle assembly. The action of the disengaged
spring should be checked at this time.
7. Slide thrust spacer (12) onto input shaft.
BEWARE OF SHARP EDGES OF COUNTERBORE WHILE SEATING
THIS O-RING.
8. Place o-ring (5) into counterbore of hub/spindle
assembly. Use grease or petroleum jelly to hold o-
ring in place.
9. Assemble carrier assembly (3) as follows:
a. Press bearing cups (203) into both ends of clus-
ter gear (206) with large inside diameter facing
out. Use an arbor type press with a 5.110 diame-
ter adapter tool.
b. Place planet shaft (205) on a flat surface with
large diameter down. Place one bearing cone
(204) over shaft and against shoulder. This
should be a slip fit.
c. Place cluster gear over planet shaft and onto
bearing cone, with large gear on top.
d. Place another bearing cone (204) over planet
shaft and into cluster gear. This is a slip fit.
e. Slide largest spacer (207) onto planet shaft.
f. Bearings in cluster gear must be seated by
applying 25-50 lb. (11-23 kg) against them and
rotating cluster gear at the same time. This can
be done by sliding a second spacer (207) over
planet shaft and pushing downward while rotat-
ing the gear.
g. See if retaining ring (208) will fit onto planet shaft
groove. If not, try smaller spacer (207) until
retaining ring fits. This will set bearings at 0.000-
0.006.
h. Place carrier on edge of a table with one set of
holes hanging over the edge. Side with roll pin
hole should be down.
i. Place bearing cones (203) into cluster gear.
j. Place cluster gear into carrier with large gear up.