Jeep Wrangler 1997, Manual

Page: 903 / 1152

WHEELS
INDEX
page page
DESCRIPTION AND OPERATION
WHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING
TIRE AND WHEEL RUNOUT . . . . . . . . . . . . . . . . 7
WHEEL INSPECTION . . . . . . . . . . . . . . . . . . . . . . 7
SERVICE PROCEDURES
TIRE AND WHEEL BALANCE . . . . . . . . . . . . . . . . 9
WHEEL INSTALLATION . . . . . . . . . . . . . . . . . . . . 8
SPECIFICATIONS
TORQUE CHART . . . . . . . . . . . . . . . . . . . . . . . . 10
DESCRIPTION AND OPERATION
WHEEL
The rim size is on the vehicle safety certification
label located on the drivers door shut face. The size
of the rim is determined by the drivetrain package.
Original equipment wheels/rims are designed for
operation up to the specified maximum vehicle capac-
ity.
All models use steel or cast aluminum wheels.
Every wheel has raised sections between the rim
flanges and rim drop well called safety humps (Fig.
1).
Initial inflation of the tire forces the bead over
these raised sections. In case of rapid loss of air pres-
sure, the raised sections help hold the tire on the
wheel.
The wheel studs and nuts are designed for specific
applications. All aluminum and some steel wheels
have wheel stud nuts with an enlarged nose. This
enlarged nose is necessary to ensure proper retention
of the wheels. Do not use replacement studs or nuts
with a different design or lesser quality.
DIAGNOSIS AND TESTING
WHEEL INSPECTION
Inspect wheels for:
•
Excessive run out
•
Dents or cracks
•
Damaged wheel lug nut holes
•
Air Leaks from any area or surface of the rim
NOTE: Do not attempt to repair a wheel by ham-
mering, heating or welding.
If a wheel is damaged an original equipment
replacement wheel should be used. When obtaining
replacement wheels, they should be equivalent in
load carrying capacity. The diameter, width, offset,
pilot hole and bolt circle of the wheel should be the
same as the original wheel.
WARNING: FAILURE TO USE EQUIVALENT
REPLACEMENT WHEELS MAY ADVERSELY AFFECT
THE SAFETY AND HANDLING OF THE VEHICLE.
USED WHEELS ARE NOT RECOMMENDED. THE
SERVICE HISTORY OF THE WHEEL MAY HAVE
INCLUDED SEVERE TREATMENT OR VERY HIGH
MILEAGE. THE RIM COULD FAIL WITHOUT WARN-
ING.
TIRE AND WHEEL RUNOUT
Radial runout is the difference between the high
and low points on the tire or wheel (Fig. 2).
Lateral runout is the wobble of the tire or wheel.
Radial runout of more than 1.5 mm (.060 inch)
measured at the center line of the tread may cause
the vehicle to shake.
Lateral runout of more than 2.0 mm (.080 inch)
measured near the shoulder of the tire may cause the
vehicle to shake.
Sometimes radial runout can be reduced. Relocate
the wheel and tire assembly on the mounting studs
(See Method 1). If this does not reduce runout to an
Fig. 1 Safety Rim
TJ
TIRES AND WHEELS 22 - 7