COATS 50xx Series Tire Changer - Manual (Page 18)

Pressure Limiter Maintenance
The pressure limiter helps prevent inflation of
standard size of larger tires or tubes beyond 60 PSI
to minimize risk of explosion. This device is for the
safety of the operator and bystanders. Proper
operation of the pressure limiter is essential to safe
operation of the machine.
Check operation of the pressure limiter as shown
and described below at least monthly:
1. Remove tires and/or wheels from the machine.
2. Connect the inflation hose to an empty service
tank with a pressure gauge (gauge should read
0). Use a tank with a 250 PSI pressure rating.
3. Depress inflation pedal to position 1 to start air
flow through the hose and into the tank.
Maintain a steady pressure for constant flow.
4. Watch the rising pressure on the tank gauge
and the gauge on the machine. Machine gauge
should cycle between check and inflation
pressures while tank gauge climbs steadily. As
tank pressure reaches 60 PSI, the pressure
limiter should stop the air flow automatically.
Both gauges should read 60 PSI ± 5 PSI.
5. Release inflation pedal. Check manual release
valve function by pressing the button and
releasing pressure from the tank until it reaches
50 PSI. Disconnect inflation hose, and release
air inside tank.
6. Replace pressure limiter if it fails to cycle
properly during inflation, if it fails to shut air
supply off at 60 PSI, or if it malfunctions in any
other way. Do not operate machine with a faulty
pressure limiter.
Operating a tire changer
with a defective,
improperly adjusted, or
by-passed pressure limiter could cause an
operator to accidentally over-pressurize a tire,
resulting in a tire explosion with severe injury or
death to the operator or bystanders. Always be
sure that the pressure limiter is present and is
operating properly on the machine at all times.
Never inflate tire above
m a n u f a c t u r e r ’ s
recommended pressure
after bead is seated. Pressure limiter is set at 60
PSI. Any required inflation above 60 PSI should
be performed in an inflation chamber/safety
cage or securely mounted on the vehicle if an
inflation chamber is not available. A tire
explosion may cause personal injury or death to
operator or bystanders may occur.
16 • COATS 50xx Series Rim Clamp Tire Changers
250 PSI Tank
with Gauge
Watch Pressure
on Both Gauges
Tire Changer
Inflation Hose
Connected to Tank
IMPORTANT: For models with “ Bead
Sealing Only” on the tire changer,
maximum limiter pressure is 15 PSI
(NOT 60 PSI).
DANGER
DANGER