COATS 4070 Tire Changer - Manual (Page 19)

Important: Always read and follow operating instructions. • 15
6. Use the plastic combination tool boots supplied
with the optional Speed Mag adapter to prevent scratch-
ing of custom wheels (figure 22). Boots may be ordered
separately (part#8106568, 10 pairs).
Figure 22 - Combination Tool Boot
Custom and Special Wheels
CAUTION
Only tire technicians with experience and
training on custom wheels should attempt
to service expensive custom alloy or alu-
minum wheels and high-performance low-
profile tires.
Alloy Wheels
Some manufacturers offer wheels with little or no drop
center. These are not DOT approved. The tire or wheel
- or both - can be damaged and the tire could explode
under pressure , resulting in serious injury or death. Do
not mount/demount this type of wheel (figure 23).
Figure 23 - No Drop Center
European Performance Wheels
(Asymmetrical Hump)
Some European wheels have very large humps except
near the valve hole. On these wheels, the beads should
be loosened at the valve hole on both the upper and
lower sides first (figure 24).
Figure 24 - Asymmetrical Hump on European Wheels
Wheels with Low Pressure Warning Sensors
Performance wheels on some vehicles (including
Corvette, BMW, Lamborghini Diablo) have a pressure
sensor strapped to the rim opposite the valve hole. On
these wheels, the beads should be loosened at the
valve hole on both upper and lower sides first (figure
25).
Figure 25 - Wheels with Low Pressure Sensor
No
Drop
Center
Slight
Hump
Large
Hump
Valve Hole
Mounting
Strap
Transmitter
Valve Hole