COATS 7665 AX/EX Tire Changer - Manual (Page 14)

CUSTOM AND SPECIAL WHEELS
If a custom wheel is dam-
aged in mounting or dis-
mounting, STOP, and
avoid damaging the other wheels. Continue only
when the cause is identified and corrected.
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. If you attempt to mount/demount this
type of wheel, use extreme caution (Figure 35).
Figure 35 - 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 36).
Figure 36 - Asymmetrical Hump on European Wheels
Wheels with Low Pressure Warning Sensors
Performance wheels on some vehicles (including
Corvette, BMW, Lamborghini Diablo) have a pres-
sure sensor strapped to the rim opposite the valve
hole. On these wheels, the beads should be loos-
ened at the valve hole on both upper and lower
sides first (Figure 37).
Figure 37 - Wheels with Low Pressure Sensor
TUBE TYPE TIRES
Mounting
1.
Avoid pinching or forcing the tube.
2. Apply rubber lubricant to the beads of the tire.
3. Mount the bottom bead.
4. Round out the tube with a small amount of air.
5. Apply rubber lubricant to the tube.
6. Insert the tube into the tire.
7. Mount the top bead.
Demounting
1.
After tire beads are loosened, lubricate the
beads and rim liberally.
2. Position demount head and bead lifting tool as
described in steps 7 through 11 on pages 4 and
5. Depress table top pedal and rotate only a
short distance at a time. This allows you to stop
the process should the tube get pinched.
3. After upper bead is demounted, remove tube
and demount lower bead.
Do it Now
Make sure the instruction and warning
decal is clean and clearly visible to opera-
tor.
No Drop
Center
Slight
Hump
Large
Hump
Valve Hole
Transmitter
Mounting
Strap
Valve Hole
✓
CAUTION
12 • 7660/7665AX/EX Rim Clamp Tire Changer