34
WHEELS & TYRES
BalancingWheels :
Dynamic balance, as shown in Fig.5, is the equal
distribution of weight of each side of the wheel
centerline so that when the tyre spins there is no
tendency for the assembly to move from side to side.
Wheels that are dynamically unbalanced may cause
shimmy.
General Balance Procedures :
Deposits of mud, etc. must be cleaned from inside of
rim.
Warning :
Remove stones from tread, clean the tyre and rim
before balancing for safety to achieve better results.
Each tyre should be inspected for any damage, then
balanced according to equipment manufacturer's
recommendation.
Off-Vehicle Balancing :
Most electronic off-vehicle balancers are more
accurate than the on-vehicle spin balancers. They
are easy to use and give a dynamic (two plane)
balance. Although they do not correct for drum or disc
unbalance as does on vehicle spin balancing, this is
overcome by their accuracy.
Fig. 5
HEAVYSPOT
WHEELSHIMMY
C/L OF SPINDLE
CORRECTIVE
WEIGHTS
ADDBALANCE
WEIGHTSHERE




