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Troubleshooting
3A1334F 25
Grease Models
Pump fails to operate Inadequate air supply pressure or
restricted air lines
Increase air supply and/or clear
restriction.
Closed or clogged pump valves Open and/or clean.
Clogged fluid line, hose, valve, or
other accessory
Relieve pressure.
Clear obstruction.
Damaged air motor Assess damage, and service air
motor.
Exhausted fluid supply Refill and reprime or flush.
Continuous air exhaust Worn or damaged piston o-ring or
valve cup
Assess wear or damage, and service
air motor.
Erratic pump operation Exhausted fluid supply Refill and reprime or flush.
Worn pump seals Replace.
Damaged shovel tube Replace.
Damaged check seat Replace pump piston or shovel rod
(or other damaged part).
Errataic or accelerated pump speed Exhausted fluid supply Refill and reprime of flush.
Fluid too heavy for pump priming Use inductor or follow plate.
Damaged valve gasket
Replace valve gasket.
Lower air pressure to prevent reoc-
currence.
Pump operates but output is low
Worn piston seal Replace.
Damaged upper check seat Replace pump piston.
Worn fluid intake seal Replace.
Damaged lower check seat Replace shovel rod.
Inadequate air supply pressure or
restricted air lines
Increase air supply and/or clear
restriction.
Partially closed or clogged pump
valves
Open and/or clean.
Air pockets in the grease inlet Eliminate the air pockets.
Partially clogged fluid line, hose,
valve, or other accessory
Relieve pressure.
Clear obstruction.
Worn seals Replace.
Grease leaking from muffler Worn throat seal Replace.