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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.
Before servicing this equipment always make sure to
Relieve the Pressure.
Note: Check all possible problems and solutions
before disassembling the pump.
Problem
Cause Solution
Pump fails to operate.
Inadequate air supply pressure or
restricted air lines
Increase air supply; clear
Closed or clogged valves Open; clean
Clogged fluid lines, hoses, valves,
etc.
Clear*
Damaged air motor Service air motor
Exhausted fluid supply Refill and reprime, or flush
Continuous air exhaust Worn or damaged air motor gasket,
packing, seal, etc.
Service air motor
Erratic pump operation
Exhausted fluid supply Refill and reprime, or flush
ppp
Held open or worn intake valve or
piston packings
Clear; service
Pump operates, but output low on
upstroke
Held open or worn piston or packings Clear; service
Pump operates, but output low on
downstroke
Held open or worn intake valve Clear; service
Pump operates, but output low on
both strokes
Inadequate air supply or restricted air
lines
Increase air supply; clear
Closed or clogged valves Open; clean
Exhausted fluid supply Refill and reprime, or flush
Clogged fluid lines, hoses, valves,
etc.
Clear*
Loose packing nut or worn packings Tighten; replace
* Follow the Pressure Relief Procedure, and disconnect the fluid line. If the pump starts when the air is turned
back on, the fluid line, hose, valve, etc. was clogged.