Ford 2002 Bantam Workshop Manual page 129

204-03-6
DIAGNOSIS AND TESTING (CONTINUED)
Condition
• Wobble or shimmy affecting
wheel run out
• Excessive vehicle vibration,
rough steering
• Vehicle vibrations from wheels
and tyres
E1076 EN
Wheels and Tyres
Possible Sources
• Damaged wheel (eventually
damages front wheel bearing
outer cone and roller bearings
and causes uneven tyre wear).
• Loose suspension components. • TIGHTEN or INSTALL new
• Inflation pressure too high or
low.
• Wheel or tyre imbalance.
• Uneven tyre wear.
• Brake disc imbalance.
• Water in tyres.
• Bent wheel.
• Incorrectly seated tyre bead.
• Excessive radial run out of
wheel or tyre.
• Loose or damaged wheel stud,
wheel nut or enlarged stud
holes.
• Debris between wheel mounting
face and hub mounting surface.
Action
• INSPECT wheel rims for dents.
INSTALL new parts as neces-
sary.
parts.
• ADJUST air pressure in tyres.
• BALANCE wheel and tyre
assembly.
• INSTALL new tyre if necessary
to correct vibration.
• CHECK brake disc fins for mud
or debris. If no damage or debris
is seen, brake disc may have a
heavy spot.
REFER to Section 206-00.
• REMOVE water.
• INSTALL new wheel. Attempts
to straighten a wheel can cause
fractures in the wheel and
weaken wheel strength.
• SPIN wheel on vehicle.
EXAMINE area where the tyre
and the wheel meet. If that sec-
tion of the tyre appears to waver
while being rotated, the tyre
bead may not be seated on the
wheel. REMOVE the tyre and
CLEAN bead seat areas on both
wheel and tyre.
• Use a dial indicator gauge to
check the radial run outs of both
the wheel and the tyre. If either
the wheel or tyre is out of speci-
fication CHECK the radial run
out of the wheel stud. When
components are out of specifica-
tion INSTALL new components.
• TIGHTEN or INSTALL new
parts as necessary.
• CLEAN mounting surfaces.
07/2001 2002 Bantam
204-03-6