COATS 700 Solid State Wheel Balancer - Manual (Page 13)

Troubleshooting
Special Problems
Customers will occasionally complain of vibration on
the car after balancing. Some possible causes are:
1. Beads are improperly seated. Check bead
seating and inflation pressure before balancing.
2. Stiffness variations in radial belts.
3. Tire or wheel out of round, wheel bent, or not
running true. Visually check runout of wheel and
tire during balance spin. Re-check mounting.
Replace wheel or tire as necessary.
4. Suspension wear, misalignment, or loose vehicle
components.
5. Wheels not correctly centered because of
damaged hub, damaged or worn center hole,
worn bolt circle holes, or imprecise original
design. Check wheel runout before balance spin
and again on the vehicle after re-mounting.
6. Sensitive suspension. Use the fine balance
mode.
Operator Complaints
1.
Balancer uses too many weights or several spins
to balance.
Remedy: Re-check rim dimensions and correct
balancer settings as necessary.
Remedy: Position weights at exactly top dead
center when weight positioning lights flash.
Remedy: Calibrate balancer.
2. Weight or position readings fluctuate.
Remedy: Check cone and hub nut for slippage.
Tighten as needed.
Remedy: Verify that the balancer is sitting solidly
on its three mounting feet. Verify that the floor is
flat and stable, that there are no tools or weights
caught between the balancer and the floor.
COATS 700 Balancer • 7