JLG 450A II Series, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-2 – JLG Lift – 3121290
Wheel Installation
WHEEL NUTS MUST BE INSTALLED AND MAINTAINED AT PROPER TORQUE TO
PREVENT LOOSE WHEELS, BROKEN STUDS, AND DANGEROUS SEPARATION OF
WHEEL FROM AXLE. USE ONLY NUTS MATCHED TO CONE ANGLE OF WHEEL.
Tighten lug nuts to proper torque to prevent wheels from
coming loose. Use a torque wrench to tighten fasteners. If you
do not have a torque wrench, tighten fasteners with a lug
wrench, then immediately have a service garage or dealer
tighten lug nuts to proper torque.
OVER-TIGHTENING WILL BREAK STUDS OR PERMANENTLY DEFORM MOUNT-
ING STUD HOLES IN WHEELS.
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:
Figure 3-1. Wheel Lug Nut Tightening Sequence
3. Torque wheel nuts after first 50 hours of operation and
after each wheel removal. Check torque every 3 months
or 150 hours of operation.
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
40 ft-lb (55 Nm) 100 ft-lb (130 Nm) 170 ft-lb (255 Nm)