JLG 1230ES Service Manual - Manual (Page 40)

SECTION 4 - BASE COMPONENTS
4-4 – JLG Lift – 3121222
4.4 REAR WHEEL HUB - INSTALLATION
NOTE: Before assembly check that inner and outer taper roller bear-
ings are lubricated (packed) with mutli-purpose grease.
1. Tighten spindle nut to 30-40 ft. lbs. (40-54 nm) to
properly seat bearings.
2. Loosen spindle nut completely until it can be turned
by hand.
3. Then finger tighten spindle nut by hand without
rotating the wheel mounting hub.
4. Install cotter pin, if necessary nut may be backed off
to nearest slot, if more than 1/2 the cotter pin hole is
visible, the nut may be tightened slightly to get the
cotter pin installed.
5. Before installing the hub cap, check wheel hub for
excessive end play.
a. Rotate hub by hand, hub should rotate freely, if
too tight, back the nut off to the next cotter pin
hole.
b. Hub should not be noticeably loose when
moved parallel with spindle center-line.
6. Install wheel, torque wheel per specification in Sec-
tion 4.3 on page 4-3.
Rear Wheel Hub Installation
1. Hub Cap
2. Cotter Pin
3. Spindle Nut
4. Washer
5. Outer Tapered Roller Bearing (a) 6. Outer Bearing Race (a)
7. Wheel Mounting Hub (a)
8. Inner Bearing Race (a)
9. Inner Tapered Roller Bearing (a)
10. Hub Seal
NOTE: (a) Bearing race (6, 8) are press fitted to wheel mounting hub (7) and are only available for service as a complete hub assembly.
Also before installing or re-installing the inner and outer taper roller bearings, be certain they are lubricated (packed) with multi-
purpose grease.
Later design incorporated wheels lugs into hub, tighten wheel lug nuts same as lug bolts, per step 6 below.