308925
68
Troubleshooting
Pump Lowers
PROBLEM
CAUSE
SOLUTION
System will not run or
stops while running.
Air pressure or air volume
is too low.
Increase air pressure. Check air compressor and air
supply filters, regulator, lubricator valves, and other com-
ponents for blockages and restrictions. Be sure that air
supply components are sized properly.
The fluid valves or hoses
are closed or restricted.
Check the gun, fluid hoses, mix manifold, static mixer,
fluid filters, regulators, valves and other fluid line compo-
nents for blockage and restrictions. Be sure that the fluid
components are sized properly.
The air motor is worn or
damaged.
Service the air motor.
The displacement cylin-
der(s) is damaged or has
seized.
See page 69 to isolate the problem pump lower.
The fluid pressure spikes
significantly (>500 psi)
while pump is running.
Air volume is too low.
Verify that air pressure at the air motor inlet is not drop-
ping during pump changeover. Check air compressor
and air supply filters, regulator, lubricator valves and
other components for blockage and restrictions. Be sure
that air supply components are sized properly. 1 in. npt
hoses, fittings, and accessories are required to provide
the necessary air volume.
Feed pump pressure is
too high.
Reduce feed pump pressure. Feed pump pressures
must be less than 25% of proportioner output pressure.
The displacement cylin-
der(s) check valves are
not seating.
See page 69 to isolate the problem pump lower.
Mix ratio test is signifi-
cantly different from the
mix ratio setting.
Mix ratio test was not per-
formed at the normal
operating pressure of the
pump.
Perform ratio test again following ratio test procedure in
the Operation Manual 308875.
Running out of one mate-
rial.
Check and refill material reservoirs. Repeat the test after
the air has been removed from the system.
The displacement cylin-
der(s) are worn or the
check valves are not seat-
ing.
See page 69 to isolate the problem pump lower.
Spray output is spitting.
Running out of one mate-
rial.
Check and refill material reservoirs. Once air is in the
fluid system it may take a while for all of it to be purged.
Siphon hoses are leaking
in air.
Tighten and seal all siphon fittings on proportioning
pump and feed pumps.
A squeaking or knocking
noise is heard.
The bearings are dry or
worn.
Lubricate the bearings or replace them if required.
The proportioner speeds
up or runs erratically.
Running out of one mate-
rial.
Check and refill material reservoirs.
The cylinders are worn or
damaged.
See page 69 to isolate the problem pump lower.
Summary of Contents for SuperCat 232721
Page 23: ...308925 23 Notes...
Page 111: ...308925 111 Notes...
Page 112: ...308925 112 Dimensions 8787A 42 in 1067 mm 66 in 1676 mm 74 in 1880 mm...
