Jeep XJ. Manual — part 471
Deflate tire completely before removing the tire
from the wheel. Use lubrication such as a mild soap
solution when dismounting or mounting tire. Use
tools free of burrs or sharp edges which could dam-
age the tire or wheel rim.
Before mounting tire on wheel, make sure all rust
is removed from the rim bead and repaint if neces-
sary.
Install wheel on vehicle, and tighten to proper
torque specification.
CLEANING AND INSPECTION
CLEANING TIRES
Remove the protective coating on the tires before
delivery of a vehicle. This coating may cause deteri-
oration of the tires.
To remove the protective coating, apply warm
water and let it soak for a few minutes. Afterwards,
scrub the coating away with a soft bristle brush.
Steam cleaning may also be used to remove the coat-
ing.
NOTE: DO NOT use gasoline, mineral oil, oil-based
solvent or a wire brush for cleaning.
SPECIFICATIONS
TIRE SIZE
Fig. 10 Remount Tire 90 Degrees In Direction of
Arrow
1 – 2ND HIGH SPOT ON TIRE
2 – 1ST HIGH SPOT ON TIRE
Fig. 11 Tire Repair Area
1 – REPAIRABLE AREA
TIRE SIZE
SUPPLIER
P215/75R15
Goodyear
P225/75R15
Goodyear
P225/70R15
Goodyear
P225/70R16
Goodyear
22 - 6
TIRES AND WHEELS
XJ
SERVICE PROCEDURES (Continued)
WHEELS
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
WHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING
SERVICE PROCEDURES
WHEEL INSTALLATION . . . . . . . . . . . . . . . . . . . . . 8
TIRE AND WHEEL BALANCE. . . . . . . . . . . . . . . . . 9
SPECIFICATIONS
TORQUE CHART . . . . . . . . . . . . . . . . . . . . . . . . . 11
DESCRIPTION AND OPERATION
WHEEL
DESCRIPTION
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 stamped steel, cast aluminum or
forged aluminum wheels. Every wheel has raised sec-
tions 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.
Fig. 1 Safety Rim
1 – FLANGE
2 – RIDGE
3 – WELL
XJ
TIRES AND WHEELS
22 - 7
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
acceptable level, the tire can be rotated on the wheel.
(See Method 2).
METHOD 1 (RELOCATE WHEEL ON HUB)
(1) Drive vehicle a short distance to eliminate tire
flat spotting from a parked position.
(2) Check wheel bearings and adjust if adjustable
or replace if necessary.
(3) Check the wheel mounting surface.
(4) Relocate wheel on the mounting, two studs
over from the original position.
(5) Tighten wheel nuts until all are properly
torqued, to eliminate brake distortion.
(6) Check radial runout. If still excessive, mark
tire sidewall, wheel, and stud at point of maximum
runout and proceed to Method 2.
METHOD 2 (RELOCATE TIRE ON WHEEL)
NOTE: Rotating the tire on wheel is particularly
effective when there is runout in both tire and
wheel.
(1) Remove tire from wheel and mount wheel on
service dynamic balance machine.
(2) Check wheel radial runout (Fig. 3) and lateral
runout (Fig. 4).
• STEEL WHEELS: Radial runout 0.040 in., Lat-
eral runout 0.045 in. (maximum)
• ALUMINUM WHEELS: Radial runout 0.030 in.,
Lateral runout 0.035 in. (maximum)
(3) If point of greatest wheel lateral runout is near
original chalk mark, remount tire 180 degrees.
Recheck runout, Refer to match mounting procedure.
SERVICE PROCEDURES
WHEEL INSTALLATION
The wheel studs and nuts are designed for specific
applications. They must be replaced with equivalent
parts. Do not use replacement parts of lesser quality
or a substitute design. All aluminum and some steel
wheels have wheel stud nuts which feature an
enlarged nose. This enlarged nose is necessary to
ensure proper retention of the aluminum wheels.
NOTE: Do not use chrome plated lug nuts with
chrome plated wheels.
Before installing the wheel, be sure to remove any
build up of corrosion on the wheel mounting surfaces.
Ensure wheels are installed with good metal-to-metal
contact. Improper installation could cause loosening
of wheel nuts. This could affect the safety and han-
dling of your vehicle.
To install the wheel, first position it properly on
the mounting surface. All wheel nuts should then be
tightened just snug. Gradually tighten them in
Fig. 2 Checking Tire/Wheel/Hub Runout
1 – RADIAL RUNOUT
2 – LATERAL RUNOUT
Fig. 3 Radial Runout
1 – MOUNTING CONE
2 – SPINDLE SHAFT
3 – WING NUT
4 – PLASTIC CUP
5 – DIAL INDICATOR
6 – WHEEL
7 – DIAL INDICATOR
22 - 8
TIRES AND WHEELS
XJ
DIAGNOSIS AND TESTING (Continued)
sequence to the proper torque specification (Fig. 5).
Never use oil or grease on studs or nuts.
WHEEL REPLACEMENT
Wheels must be replaced if they have:
• Excessive runout
• Bent or dented
• Leak air through welds
• Have damaged bolt holes
Wheel repairs employing hammering, heating, or
welding are not allowed.
Original equipment wheels are available through
your dealer. Replacement wheels from any other
source should be equivalent in:
• Load carrying capacity
• Diameter
• Width
• Offset
• Mounting configuration
Failure to use equivalent replacement wheels may
affect the safety and handling of your vehicle.
Replacement with used wheels is not recommended.
Their service history may have included severe treat-
ment.
TIRE AND WHEEL BALANCE
It is recommended that a two plane service
dynamic balancer be used when a tire and wheel
assembly require balancing. Refer to balancer opera-
tion instructions for proper cone mounting proce-
dures. Typically use front cone mounting method for
steel wheels. For aluminum wheel use back cone
mounting method without cone spring.
NOTE: Static should be used only when a two
plane balancer is not available.
NOTE: Cast aluminum and forged aluminum wheels
require coated balance weights and special align-
ment equipment.
Wheel balancing can be accomplished with either
on or off vehicle equipment. When using on-vehicle
balancing equipment, remove the opposite wheel/tire.
Off-vehicle balancing is recommended.
For static balancing, find location of heavy spot
causing
the
imbalance.
Counter
balance
wheel
directly opposite the heavy spot. Determine weight
required to counter balance the area of imbalance.
Place half of this weight on the inner rim flange and
the other half on the outer rim flange (Fig. 6).
For dynamic balancing, the balancing equipment is
designed to locate the amount of weight to be applied
to both the inner and outer rim flange (Fig. 7).
Fig. 4 Lateral Runout
1 – MOUNTING CONE
2 – SPINDLE SHAFT
3 – WING NUT
4 – PLASTIC CUP
5 – DIAL INDICATOR
6 – WHEEL
7 – DIAL INDICATOR
Fig. 5 Lug Nut Tightening Pattern
XJ
TIRES AND WHEELS
22 - 9
SERVICE PROCEDURES (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст