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Troubleshooting
INJECTION HAZARD
To reduce the risk of serious bodily
injury, including fluid injection or splash-
ing in the eyes or on the skin, always
follow the Pressure Relief Procedure on page 8
whenever you shut off the pump, when checking or
servicing any part of the system, when installing or
changing dispensing devices, and whenever you
stop dispensing.
WARNING
NOTE: Check all other possible problems and
solutions before disassembling the pump.
Problem
Cause Solution
Pump fails to operate Inadequate air supply pressure or
restricted air lines
Increase air supply; clear
Closed or clogged dispensing
valve
Open; clean
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 piston valve 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; clean
* Follow the Pressure Relief Procedure on page 8, and disconnect the fluid line. If the pump starts when
the air is turned on again, the line, hose, valve, etc., is clogged.