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Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Relieve pressure before you check or service any
system equipment.
MOVING PARTS HAZARD
Never operate the pump with the
warning plate or the identification plate
removed. These plates protect your
fingers from pinching or amputation by moving
parts in the air motor.
WARNING
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 dam-
aged part).
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.