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8 308655J
Operation
Never allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a
high speed, possibly damaging itself, and it may
get very hot.
CAUTION
7. Read and follow the instructions supplied with
each component in your system.
8. If the pump will be unattended for any period of
time, if there is an air supply interruption, or to shut
off the system at the end of the work shift, always
relieve the pressure.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
9. Check periodically to ensure that the pump’s
mounting is secure.
Troubleshooting
SKIN INJECTION HAZARD
To reduce the risk of serious bodily injury, including fluid injection or splashing in the eyes or on the
skin, always follow the Pressure Relief Procedure on page 7 when you shut off the pump, check or
service any part of the system, install or change dispensing devices, and when you stop dispensing.
WARNING
NOTE: Check all other possible problems and solutions before you disassemble the pump.
Problem Cause Solution
Pump fails to operate, or there is
no fluid flow.
Inadequate air supply pressure or
restricted air lines
Increase air supply; clear
Closed or clogged dispensing
valve
Open; clear
Clogged fluid lines, hoses, valves,
etc.
Clear*
Damaged air motor Service air motor
Exhausted fluid supply Refill and reprime or flush
Continuous air exhaust Worn or damaged air motor gas-
ket, packing, seal, etc.
Service air motor
Erratic pump operation Exhausted fluid supply Refill and reprime or flush
Held open or worn intake valve or
piston packings
Clear; service
Pump operates, but output low on
up stroke
Held open or worn piston packings Clear; service
Pump operates, but output low on
down stroke
Held open or worn intake valve Clear; service
Pump operates, but output low on
both strokes
Inadequate air supply pressure or
restricted air lines
Increase air supply; clear
Closed or clogged valves Open; clear
Fluid is coming out of the muffler. Worn or damaged throat seal Service
* Follow the Pressure Relief Procedure on page 7, and disconnect the fluid line. If the pump starts when
the air is turned on again, the line, hose, valve, etc., is clogged.