COATS 7xxx Series Tire Changer - Manual (Page 15)

Important: Always read and follow operating instructions. • 11
CAUTION
Use of bead sealing jets without a tire in
place can cause dirt and debris to be blown
into the air with enough force to injure
operator and/or bystander. Do not use the
bead sealing control position to inflate a tire.
R. This unit is equipped with a pressure limiter to
assist the operator with proper tire inflation. When
the inflation pedal is held in position 2, the pressure
limiter cycles the system between position 2 (infla-
tion) and position 1 (at rest, no airflow to tire). This
cycling helps to prevent over inflation of the tire.
Tires can still be over inflated and explode, when
using this pressure limiter, if all of the instructions
in this manual are not followed completely. The
pressure limiter will keep most car and light truck
tires from inflating beyond 60 PSI (smaller tires
may reach higher pressures). It is the operator's
responsibility to follow all instructions and to control
inflation pressure as specified in these instructions.
Check the function of the pressure limiter regularly
and maintain it according to the instructions pro-
vided in this manual for safe and proper operation.
Do not tamper with or attempt to adjust the pres-
sure limiter. Tires requiring inflation beyond 60 PSI
should be inflated in a safety cage.
Bead Sealing
1. Remove the valve core from the valve stem to
allow more air flow into the tire to assist with bead seal.
2. Position valve stem in front of operator and con-
nect the inflation hose with the clip-on chuck. Hold
tire up against upper edge of the wheel. Be sure tire’s
top bead does not cover the bottom of the valve stem
(figure 24).
Figure 24 - Lift Tire Upwards for Bead Sealing
3. Depress inflation pedal to position 2 and hold
about one second to begin air flow through tire valve,
then depress pedal to position 3 and hold briefly — less
than one full second. The blast of air from the jet(s) will
expand tire and seal the beads.
4. Release the inflation pedal and allow it to return to
position 1. Verify that both beads are completely sealed
to the wheel. Repeat these steps if beads have not
sealed. It may be necessary to wait a few seconds for
the air storage tank pressure to recover before attempt-
ing again.
5. After bead seal is achieved, remove the clip-on
chuck and reinstall the valve core. Reattach the clip-on
chuck after core is installed.