COATS RC-50M Rim Clamp Tire Changer - Manual (Page 6)

2 • Important: Always read and follow the operating instructions.
Operating Instructions
This unit must be properly operated and properly
maintained to help avoid accidents that could damage
the unit and injure the operator or bystanders. This sec-
tion of the Operating Instructions manual reviews
basic operations and use of controls. These instruc-
tions should be reviewed with all employees before
they are allowed to work with the machine. Keep these
instructions near the machine for easy reference.
Bead Loosening and Demounting
This machine may operate differently from
machines you have previously operated.
Practice with a regular steel wheel and tire
combination to familiarize yourself with the
machine’s operation and function.
Remember to remove all weights from both sides of
the wheel. Weights left on backside of wheel may
cause the wheel to be clamped unleveled. This may
result in the combination duckhead
® contacting the rim
causing scratches. On alloy wheels, always rotate the
wheel one turn after setting the duckhead to insure
proper wheel chucking.
Note: Always review with the owner any nicks and
scratches on expensive wheel and tire combinations
prior to servicing.
1. Deflate the tire completely by removing the valve
core from the valve stem (figure 1). Be cautious and do
not smoke as a
flammable gas could have been intro-
duced into the tire at some time.
Figure 1 - Remove Valve Core to Deflate Tire
Loosening the beads on a partially or fully
inflated tire is unsafe and causes excess
movement and friction against the bumper
pads and excessive wear on pivots. Deflate
the tire completely to prolong the life of
your machine.
ATV Note: It may be necessary on ATV wheels to
leave 3-6 PSI in some of these wheels to facilitate
bead loosening. Even after loosening one bead; it may
be necessary to reinflate to 5 PSI to loosen the oppo-
site bead.
Note: Always loosen the bead on the narrow side of
the wheel’s drop center first (motorcycle wheels may
not have a narrow or long side, and some ATV wheels
may not bolt together). See figure 4 for more informa-
tion on the drop center.
Remember: The clamps on the table top may extend
beyond the table top itself. To avoid damaging the
clamps, move them to their full inward position before
positioning a tire for bead loosening.
Note: Use extra care in positioning the bead loosener
shoe on larger wheels/tires, and on alloy wheels. Make
sure the shoe rests next to but not on the rim, and not
on the tire sidewall.
2. If using the optional bead loosener, lift bead
loosener shoe away from the machine. Adjust the
blocks so that the rim rests on top of them. Lay wheel
into position. Position the bead loosener shoe against
the tire next to, but not on, the rim. Depress the bead
loosener arm to loosen the bead. It may be necessary
to loosen the bead in multiple locations around the tire
(figure 2).
Figure 2 - Position Tire on Bead Loosener Shoe
CAUTION
CAUTION
Motorcycle ATV