JLG 642 Operation & Safety Manual page 173

Due to size variations between tire brands, when selecting and installing a replacement
tire ensure both tires on the axle are the same.
The rims installed have been designed for stability requirements which consist of track
width, tire pressure and load capacity. Size changes such as rim width, center piece
location, larger or smaller diameter, etc., without written factory recommendations, may
result in unsafe condition regarding stability.
E. Wheel Installation
Torque lug nuts after first 50 hours and after each wheel installation.
Note: If machine is equipped with directional tire assemblies, wheel and tire assemblies must
be installed with directional tread pattern "arrows" facing in direction of forward travel.
1. Start all nuts by hand to prevent cross threading. DO NOT use a lubricant on threads
or nuts.
.
2. Tighten lug nuts in an alternating pattern as indicated in figure. See page 9-6 for
torque value.
TIP OVER HAZARD. Lug nuts must be installed and maintained at the proper torque
to prevent loose wheels, broken studs and possible separation of wheel from the axle.
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Section 7—Lubrication and Maintenance
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WARNING
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OY1220
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