Service Manual Instruction Manual

SECTION 3 - CHASSIS & TURNTABLE
3-2 – JLG Lift – 3121171
Wheel Installation
It is extremely important to apply and maintain proper wheel
mounting torque.
WHEEL NUTS MUST BE INSTALLED AND MAINTAINED AT THE PROPER TORQUE
TO PREVENT LOOSE WHEELS, BROKEN STUDS, AND POSSIBLE DANGEROUS
SEPARATION OF WHEEL FROM THE AXLE. BE SURE TO USE ONLY THE NUTS
MATCHED TO THE CONE ANGLE OF THE WHEEL.
Tighten the lug nuts to the proper torque to prevent wheels
from coming loose. Use a torque wrench to tighten the fasten-
ers. If you do not have a torque wrench, tighten the fasteners
with a lug wrench, then immediately have a service garage or
dealer tighten the lug nuts to the proper torque. Over-tighten-
ing will result in breaking the studs or permanently deforming
the mounting stud holes in the wheels. The proper procedure
for attaching wheels is as follows:
1. Start all nuts by hand to prevent cross threading. DO
NOT use a lubricant on threads or nuts.
2. Tighten nuts in the following sequence:
3. The tightening of the nuts should be done in stages. Fol-
lowing the recommended sequence, tighten nuts per
wheel torque chart.
4. Wheel nuts should be torqued before first road use and
after each wheel removal. Check and torque every 3
months or 150 hours of operation.
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
45 ft. lbs.
(60 Nm)
100 ft. lbs.
(140 Nm)
180 ft. lbs.
(252 Nm)