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VA
TIRES/WHEELS (Continued)
Fig. 4 First Measurement On Tire
1 - REFERENCE MARK
2 - 1ST MEASUREMENT HIGH SPOT MARK TIRE AND RIM
3 - WHEEL
4 - VALVE STEM
Fig. 5 Remount Tire 180 Degrees
1 - VALVE STEM
2 - REFERENCE MARK
(5) If runout is still excessive, the following proce-
dures must be done.
• If the high spot is within 101.6 mm (4.0 in.) of
the first spot and is still excessive, replace the tire.
• If the high spot is within 101.6 mm (4.0 in.) of
the first spot on the wheel, the wheel may be out of
specifications. Refer to Wheel and Tire Runout.
• If the high spot is NOT within 101.6 mm (4.0
in.) of either high spot, draw an arrow on the tread
from second high spot to first. Break down the tire
and remount it 90 degrees on rim in that direction
(Fig. 6). This procedure will normally reduce the
runout to an acceptable amount, if not replace the
rim.
Fig. 6 Remount Tire 90 Degrees In Direction of
1 - 2ND HIGH SPOT ON TIRE
2 - 1ST HIGH SPOT ON TIRE
STANDARD PROCEDURE - 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.
TIRES/WHEELS 22 - 3
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