COATS 7665 AX/EX Tire Changer - Manual (Page 17)

Separator/Lubricator Maintenance
Check oil and water levels regularly, and perform
these maintenance items weekly:
A. Disconnect air supply to machine.
B. Drain water from the separator by unscrewing
the petcock on the bottom of bowl. Allow water
to drain and tighten petcock securely by hand.
C. Add oil to the lubricator if the fluid level is more
than 1/4” from the top of the gauge. Remove the
filler plug on top of the lubricator and add SAE
10W non-detergent oil or an air tool oil to bring
the level up to 1/4” from the top of the gauge.
Replace filler plug and clean up any spilled oil.
D. Adjust the oil flow by pulling the red flow adjust-
ment ring up and turning it to increase or
decrease the flow. Push the ring down to lock.
Watch the formation of oil drops in the see-
through oil chamber. Reconnect the air supply
and continually cycle the bead loosener through
full strokes and count the drips during the
cycles. The delivery of oil to the air line should
be about 1 drop per 10 cylinder cycles. Adjust
flow as required.
Mount/Demount Head Cleaning
Clean dirt and debris from the mount/demount tool
(duckhead) roller with small screw driver or pick.
Pressure Limiter Maintenance
The pressure limiter helps prevent inflation of stan-
dard 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 opera-
tion of the pressure limiter is essential to safe opera-
tion 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 pres-
sures 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 prop-
erly 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 pres-
sure limiter.
Operating a tire changer
with a defective, improp-
erly 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
manufacturer’s recom-
mended 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.
77050/7055/7060/7065 X/EX Rim Clamp Tire Changer • 15
Drain
Petcock
Air In Air Out
Oil Fill
Oil Flow
Adjust
Lubricator Separator
250 PSI Tank
with Gauge
Watch Pressure
on Both Gauges
Tire Changer
Inflation Hose
Connected to Tank
DANGER
DANGER