7
Troubleshooting Guide
(1) Follow the
Pressure Relief Procedure
and disconnect the fluid line. If the pump starts when the air is turned on again,
the line, etc. is clogged.
TROUBLE
PROBABLE CAUSES
REMEDY
NOTE:
Check all other possible causes before
disassembling the pump.
Pump does not operate
Inadequate air supply pressure or
Increase air supply; clear
(1)
restricted air line
Clogged fluid lines, hoses, valves,
Open; clear
(1)
etc.
Damaged air motor
Service/replace air motor
Empty Fluid Supply
Refill, reprime and/or flush
Air motor not tripping over
Air motor o-rings are worn/damaged Service/replace air motor
Air leaking from exhaust
Worn or damaged air motor o-ring
Service/replace air motor
and/or seal, etc.
Replace o-ring (19)
Fluid leaking from exhaust
Seal (25) is worn and/or damaged
Replace
Erratic pump operation
Air entering suction line
Check for loose connection
Fluid level too low
Refill, reprime, or flush
Air motor icing
Run pump at lower pressure; run
at lower cycles per minute; clean
mufflers
Pump runs "wild"
Empty fluid supply
Refill, reprime or flush
Blockage in pump tube (30) or
Remove pump tube; clean
footvalve (34)
blockage
Lower ball (31) is stuck in footvalve
Replace ball and reseat footvalve
Lower seal (11) on fluid piston (10) is Replace with new seal
worn or damaged
Fluid output on one stroke only Retainer (33) is broken (ball floats
Service and replace
with fluid)
Upper ball (9) is lodged in piston (10) Service and replace
Pump operates, but output low
Inadequate air supply pressure or
Increase air supply; increase
on both strokes
restricted air lines
delivery line size
Closed or clogged solenoid valve,
Clear
(1)
meter, dispensing valve, etc.
Empty fluid supply
Refill, reprime or flush
Air inlet strainer/filter clogged
Clear
(1)
