7
CAUTION:
Before servicing, reduce
fluid supply pressure to zero.
Troubleshooting Guide
Trouble
Probable Cause
Corrective Action
Pump does not operate
Inadequate air supply pressure or
Increase or clear air supply
(1)
restricted air line Assure air is on and valves are open
Clogged lines, hoses, valves, etc.
Open; clear
(1)
Damaged air motor
Service / replace air motor
Air motor is not tripping over
Air motor seals are worn/damaged
Service / replace air motor
Air is leaking from exhaust
Air motor seals are worn/damaged
Service / replace air motor
and or seal damage, etc.
Fluid is leaking from the exhaust
Fluid seal (8) is worn/damaged
Replace
Erratic pump operation
Air entering suction line
Check for loose connections
Fluid level too low
Refill, reprime or flush
Air motor icing
Run pump at lower pressure; run at lower
cycles per minute; clean muffler (38)
Pump runs continuously
Empty fluid supply
Refill, reprime or flush
Blockage in pump tube or foot valve (16)
Remove pump tube, clear blockage
Lower ball (14) is stuck in foot valve (16)
Replace ball and reseat foot valve
Lower seal (21) is worn or damaged
Replace
Fluid output on one stroke only or
Upper ball (19) is stuck in fluid piston (20)
Replace ball and reseat
continues to operate when
or one or both are damaged
dispensing valve is closed
Pump operates, but pump output
Inadequate air supply pressure or
Increase air supply; increase air supply size
on both strokes is low
restricted air line
Closed or clogged solenoid valve, meter,
Clear
(1)
dispensing valve, etc.
Air inlet strainer/filter clogged
Clear
(1)
(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.
NOTE:
Check all other possible
causes before disassembling pump.
!