201-03-6 Wheel and Tyre
Diagnosis and Test（continued）
Phenomena
Possible Failure Causes
Measures
• Wheel run-out is influenced by
shaking or abnormal vibration.
• Wheel is disabled (especially
external retaining ring of the front
wheel bearing and the rolling
column bearing are damaged.)
• Inspect wheel rim. Parts
replacement should be performed if
necessary.
• Excessive fluttering of the
automobile and bad steering.
• Suspending parts are loose.
• The parts should be tightened or
replaced.
• Automobile vibration caused by
wheel and tyre.
• Tyre air pressure is excessive.
•Tyre air pressure should be
adjusted.
• Wheel or tyre is out of balance.
• Wheel and tyre assembly should
be balanced.
• Tyre is unevenly worn.
• The tyre should be replaced for
eliminating vibration.
• Brake disc is out of balance.
• Inspect to make sure whether dirt
or fragments are on the brake disc.
If a damaged brake disc or
fragments are found, heavy dirt
may be on the brake disc.
• Water enters into the tyre.
• The accumulated water should be
drained.
• The wheel is bent.
• A new wheel should be installed.
Trying to repair the wheel may
leads to wheel break and reduce the
wheel intensity.
• Tyre edge is correctly assembled.
• The wheel should be rotated on the
vehicle. The combining position of
the wheel and the tyre should be
inspected. If swing is found on
some part when rotation is
performed, wheel and tyre may not
be well assembled on this part.
Remove the tyre and clean the
combining position of the wheel
and the tyre.
•Radial run-out of the wheel or the
tyre is excessive.
•Radial run-out of the wheel or the
tyre should be measured by the dial
gauge. If the radial run-out amount
of the wheel or the tyre is not in the
regulated scope, a further
inspection on radial run-out of the
wheel bolt should be performed. If
the radial run-out amount of the
wheel bolt is out of the range, a
replacement should be performed.
•The wheel bolt is loose or damaged,
or bolt holes of the wheel are
expanded.
• Tightening or replacement should
be performed if necessary.
Benni Mini
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