JLG 150HAX Service Manual - Manual (Page 65)

SECTION 3 - CHASSIS & TURNTABLE
3120817 – JLG Lift – 3-27
Assembly
1. Assemble hub/shaft assembly as follows:
a. Set hub (9) on work surface, wide end up. Using
a suitable press, press bearing cup (2) into
counterbore in tall end of hub.
b. Set hub on work surface, wide end down. Using
the press, install bearing cup (4) into counter-
bore in small end of hub.
c. Using the press, press bearing cone (5) onto
smaller end of shaft (1).
d. Slowly lower hub, small end down, onto shaft.
Check initial torque. Install one bolt (31) into bolt
circle of hub, and, keeping torque wrench tan-
gent to bolt circle, pull torque wrench smoothly
toward you. Rolling torque must fall in the range
of 30-40 in. lb. (3-5 Nm). If it does, proceed to
step (f). If not, perform step (e).
e. If rolling torque is below 30-40 in. lb. (3-5 Nm),
apply more pressure to bearings. If rolling
torque is above 30-40 in. lb. (3-5 Nm), tap top of
shaft to release bearings and repeat step (d).
f. Using the bearing press, press bearing cone (3)
around shaft in hub.
g. Clean threads on shaft and apply “Primer T” (a
de-greasing agent) to shaft. Apply a light coat of
“Primer T” to locknut (8). Allow 2-3 minutes’ dry-
ing time.
h. Place tanged washer (7) over end of shaft.
i. Place lockwasher (6) over shaft.
NOTE: Loctite 277 is an anaerobic adhesive; once out of
contact with air, it begins to set. Read steps (j) thru
(m) before performing them as quickly as possible.
j. Apply Loctite 277 to threads of locknut (8). DO
NOT put Loctite on shaft threads.
k. Thread locknut onto shaft, making sure that
chamfered side of locknut is facing toward lock-
washer, and tighten locknut down by hand.
l. Using torquing tool and locknut wrench, torque
locknut to 175 ft. lb. (237 Nm). One tab of lock-
washer should be aligned with slot in locknut
when torquing is done. Tighten locknut to align
slot if necessary, but NEVER LOOSEN THE
LOCKNUT.
m. Check final rolling torque. Put a torque wrench
on bolt in hub, and, keeping torque wrench tan-
gent to bolt circle, pull torque wrench smoothly
toward you. Final rolling torque must be 5-10 in.
lb. (0.6-1 Nm) greater than initial reading. If final
reading is correct, proceed to step (o). If not,
perform step (n).
n. If final rolling torque is less than 5-10 in. lb. (0.6-
1 Nm) higher than initial reading, tighten locknut
slightly and re-measure. If final rolling torque is
greater than 5-10 in. lb. (0.6-1 Nm) higher than
initial reading, remove locknut and lockwasher,
remove Loctite from all parts, and repeat steps
(g) through (m) to reinstall parts.
o. Remove bolt (31) from bolt circle of hub and
bend aligned tang of lockwasher into slot in
locknut.
p. Stake locknut in four equally spaced places 1/8
inch (3.2 mm) from inner edge of locknut.
q. Apply a light coat of “Never-Seize” to three mag-
netic pipe plugs (12) and install then into side of
hub.
r. Turn unit over onto its wide end. Using a seal
pressing tool, press seal (10), seal lip facing up,
into hub around end of shaft.
s. Apply a light coat of “Never-Seize” to pipe plug
(11) and install it into bottom of hub near shaft.
2. Assemble carrier assembly (16) as follows:
a. Apply a light coating of petroleum jelly or multi-
purpose grease to inside of one cluster gear (19)
and line inside of large end of cluster with nine-
teen needle rollers (13).
b. Place spacer (17) on top of needle rollers inside
cluster gear.