COATS Extended Mobility (EMT) RunFlat Tires - Manual (Page 24)

H–2 Inflation
IMPORTANT: Many tire changers are equipped with a pres-
sure limiter to assist the operator with proper tire inflation.
When the inflation pedal is held in position 2, the pressure
limiter cycles the machine between position 2 (inflation) and
position 1 (at rest, no air flow). This cycling helps to prevent
over inflation of the tire. Tires can still be over inflated and
explode with the use of the 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 pres-
sures). It is the operator’s responsibility to follow all instruc-
tions and to control inflation pressure as specified in these
instructions. Check the function of the pressure limiter regu-
larly and maintain it according to any provided service
instructions for safe and proper operation. Tires that require
inflation beyond 60 PSI must be inflated in a safety cage.
Bead Sealing
1 Bead sealing is typically not a problem when inflating
EMT/RunFlat Tires. Connect the inflation hose to the tire
valve stem. Hold the tire up against the upper edge of the
wheel. Be sure the top bead of the tire is over the bottom of
the valve stem.
2 Depress the inflation pedal to position 2 and hold about
1 second to begin air flow, then depress the pedal to
position 3 and hold very briefly–less than 1 full second. The
blast of air from the jets will expand the tire and seal the
beads.
3 Release the inflation pedal and allow it to return to posi-
tion 1. Verify that both beads are completely sealed to the
wheel. Repeat these steps if the beads have not been sealed.
NOTE: If the tire and wheel are properly lubricated and the
operator cannot achieve bead seal after 3 or 4 attempts, the
valve core may be removed from the valve stem to allow
more air into the tire to assist with bead seal.