Chrysler 300M, Dodge Interpid. Manual — part 337

miles to warm tires (remove any flat spots). Lightly
place hands on steering wheel at the 10:00 and 2:00
positions while slowly sweeping up and down from 90
to 110 km/h (55 to 70 mph) where legal speed limits
allow.

Observe the steering wheel for:
• Visual Nibble (oscillation: clockwise/counter-

clockwise, usually due to tire imbalance)

• Visual Buzziness (high frequency, rapid vibra-

tion up and down)

To rule out vibrations due to brakes or powertrain:
• Lightly apply brakes at speed; if vibration occurs

or is enhanced, vibration is likely due to causes other
than tire and wheel assemblies.

• Shift transmission into neutral while vibration

is occurring; if vibration is eliminated, vibration is
likely due to causes other than tire and wheel assem-
blies.

For brake vibrations, (Refer to 5 - BRAKES -

BASE/HYDRAULIC/MECHANICAL/ROTORS

DIAGNOSIS AND TESTING).

For powertrain vibrations, (Refer to 3 - DIFFER-

ENTIAL & DRIVELINE - DIAGNOSIS AND TEST-
ING).

For tire and wheel assembly vibrations, continue

with this diagnosis and testing procedure.

TIRE AND WHEEL BALANCE

(1) Balance the tire and wheel assemblies as nec-

essary following the wheel balancer manufacturer’s
instructions and using the information listed in Stan-
dard Procedure - Tire And Wheel Balance. (Refer to
22 - TIRES/WHEELS - STANDARD PROCEDURE)

(2) Road test the vehicle for at least 5 miles, fol-

lowing the format described in Road Test.

(3) If the vibration persists, continue with this

diagnosis and testing procedure.

TIRE AND WHEEL RUNOUT/MATCH MOUNTING

(1) System Radial Runout. This on-the-vehicle

system check will measure the radial runout includ-
ing the hub, wheel and tire.

(a) Raise vehicle so tires clear floor. (Refer to

LUBRICATION & MAINTENANCE/HOISTING -
STANDARD PROCEDURE)

(b) Apply masking tape around the circumfer-

ence of the tire in the locations to be measured
(Fig. 2). Do not overlap the tape.

Set, Special Tool C-3339A with 25-W wheel, or
equivalent. Place the end of the indicator against
each taped area (one at a time) (Fig. 2) and rotate
the tire and wheel. System radial runout should
not exceed 0.76 mm (0.030 inch) with no tread
“dips” or “steps.” Tread “dips” and “steps” can be
identified by spikes of the dial indicator gauge.
• Tread 9dips9; Rapid decrease then increase in

dial indicator reading over 101.6 mm (4.0 inch) of
tread circumference.

• Tread 9steps9; Rapid decrease or increase in dial

indicator reading over 101.6 mm (4.0 inch) of tread
circumference.

Fig. 1 Aluminum Wheel Weight

1 - TIRE
2 - WHEEL
3 - WHEEL WEIGHT

22 - 2

TIRES/WHEELS

(d) If system runout is excessive, re-index the

tire and wheel assembly on the hub. Remove
assembly from vehicle and install it back on the
hub two studs over from original mounting posi-
tion. If re-indexing the tire and wheel assembly
corrects or reduces system runout, check hub
runout and repair as necessary (Refer to 5 -
BRAKES

BASE/HYDRAULIC/MECHANICAL/

ROTORS - DIAGNOSIS AND TESTING).

(e) If system runout is still excessive, continue

with this diagnosis and testing procedure.

(2) Tire and Wheel Assembly Radial Runout.

This radial runout check is performed with the tire
and wheel assembly off the vehicle.

(a) Remove tire and wheel assembly from vehicle

and install it on a suitable wheel balancer.

(b) Check system runout using Dial Indicator

Set, Special Tool C-3339A with 25-W wheel, or
equivalent. Place the end of the indicator against
each taped area (one at a time) (Fig. 2) and rotate
the tire and wheel. Radial runout should not
exceed 0.76 mm (0.030 inch) with no tread “dips”
or “steps.” Tread “dips” and “steps” can be identi-
fied by spikes of the dial indicator gauge.

location of the tire on the wheel at the valve stem
(Fig. 3). Also, mark the tire and wheel to indicate
the original high spot of the assembly and record
the runout measurement.

(d) If runout exceeds limits, the tire will need to

be dismounted from the wheel to verify wheel vs.
tire contribution. Refer to Wheel Runout below.

(3) Lateral Runout. Lateral runout for the vehi-

cle system as well as the tire and wheel assembly
should be less than 0.76 mm (0.030 inch). The same
procedure and theory described for radial runout can
also be applied to identify and reduce lateral runout.

(4) Wheel Runout. This runout check is per-

formed as follows:

(a) Dismount the tire from the wheel.
(b) Mount the wheel back on the wheel balancer.
(c) Measure radial runout of the wheel at the

tire bead seat (Fig. 4). Runout should not exceed
0.254 mm (0.010 inch) for aluminum wheels and
0.508 mm (.020 inch) for steel wheels. Replace the
wheel if it exceeds the limit.

(d) Measure lateral runout of the wheel at the

tire bead seat (Fig. 5). Runout should not exceed
0.762 mm (0.030 inch) for all wheels. Replace the
wheel if it exceeds the limit.
(5) Match Mounting. If the wheel runout is

within specifications, tire and wheel assembly runout
can be improved by re-indexing (match mounting)
the tire to the wheel as described below.

(a) Remount the tire on the rim 180 degrees

from its original location (Fig. 6). Ensure the tire
bead is properly seated.

(b) Re-measure the total runout. Mark the tire

at the high spot and record the measurement.

Fig. 2 Radial Runout Measurement

1 - MASKING TAPE
2 - DIAL INDICATOR

Fig. 3 Marking Tire

1 - REFERENCE MARK
2 - EXAMPLE HIGH SPOT ON TIRE
3 - WHEEL
4 - VALVE STEM

TIRES/WHEELS

22 - 3

TIRES/WHEELS (Continued)

If runout is still excessive, perform the following:
• If the new high spot is within 102 mm (4.0 inch)

of the first high spot on the tire, replace the tire.

• If the new high spot is within 102 mm (4.0 inch)

of the first high spot on the wheel, the wheel may be
out of specification. Refer to Wheel Runout above.

• If the new high spot is NOT within 102 mm (4.0

inch) of either high spot, draw an arrow on the tread

from new high spot toward the original (Fig. 7).
Break down the tire and remount it 90 degrees on
rim in that direction, then re-measure runout. This
will normally reduce the runout to an acceptable
amount.

Fig. 4 Checking Radial Runout Of Wheel

1 - MOUNTING CONE
2 - SPINDLE SHAFT
3 - WING NUT
4 - PLASTIC CUP
5 - DIAL INDICATOR
6 - WHEEL
7 - DIAL INDICATOR

Fig. 5 Checking Lateral Runout Of Wheel

1 - MOUNTING CONE
2 - SPINDLE SHAFT
3 - WING NUT
4 - PLASTIC CUP
5 - DIAL INDICATOR
6 - WHEEL
7 - DIAL INDICATOR

Fig. 6 Remount Tire 180 Degrees

1 - VALVE STEM
2 - REFERENCE MARK

Fig. 7 Remount Tire 90 Degrees In Direction of

Arrow

1 - 2ND HIGH SPOT ON TIRE
2 - 1ST HIGH SPOT ON TIRE

22 - 4

TIRES/WHEELS

TIRES/WHEELS (Continued)

Была ли эта страница вам полезна?

Да!Нет

1 посетитель считают эту страницу полезной.

Chrysler 300M, Dodge Interpid. Manual — part 337

Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.