Operating Instructions; Tire Bead Loosening And Demounting - Coats gts series Operation Instructions Manual

Operating Instructions

This unit must be properly operated and properly
maintained to help avoid accidents that could injure
the operator or bystanders, or damage the unit. This
section of the Operating Instructions manual review
basic operations and use of controls. These instructions
should be reviewed with all employees before they are
allowed to work with the machine. Keep these instruc-
tions near the machine for easy reference.

Tire 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.
Note: 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 Duckhead
mount/demount tool contacting the rim causing
scratches. On alloy wheels, always rotate the
wheel one turn after setting the mount/demount
tool to insure proper wheel clamping.
Note: Always review with the owner any nicks and
scratches on expensive wheel and tire combina-
tions prior to servicing.
Note: Review the performance wheel section of
this manual prior to servicing performance tire/
wheel combinations.
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.
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
introduced into the tire at some time.
Important: Always read and follow operating instructions.
Figure 1 - Remove Valve Core to Deflate Tire
Tires are always installed and removed from
the rim's narrow side.
Note: Always loosen the bead on the narrow side
of the wheel's drop center first (tire removed in
figure 2 for clarity).
®
Figure 2 - Determine Narrow Side of Wheel
Note: The clamps on the table top may extend
beyond the table top itself. To avoid damaging
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. Actuate valve (or pull) to position the bead loosener
shoe away from the machine and roll wheel into posi-
tion. The valve stem should be in the 2 o'clock position
to accommodate a possible asymmetric safety hump
type rim. Position the bead loosener shoe against
the tire next to, but not on, the rim. Actuate the bead
loosener hand valve to position the shoe and loosen
the bead. It may be necessary to loosen the bead in
multiple locations around the tire (figure 3).
Narrow Side
Drop Center
Long Side
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