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Troubleshooting
309966J 7
Troubleshooting
Relieve pressure before you check or service any
system equipment.
Problem Cause Solution
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 air motor
gasket or seal
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.
Held open or worn piston valve or
seal
Clear valve; replace seal.
Held open or worn intake valve or
seal.
Clear valve; replace seal.
Pump operates, but output low on up
stroke
Worn piston seal Replace.
Damaged upper check seat Replace pump piston.
Pump operates, but output low on
down stroke
Worn fluid intake seal Replace.
Damaged lower check seat Replace shovel rod.
Pump operates, but output low on
both strokes
Inadequate air supply pressure or
restricted air lines
Increase air supply and/or clear
restriction.
Closed or clogged pump valves Open and/or clean.
Exhausted fluid supply Refill fluid supply, and reprime pump.
Clogged fluid line, hose, valve, or
other accessory
Relieve pressure.
Clear obstruction.
Worn seals Replace.
Grease leaking from muffler plates Worn throat seal Replace.