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WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
Problem
Pump fails to operate.
Continuous air exhaust
Erratic pump operation
Pump operates, but output low on
upstroke
Pump operates, but output low on
downstroke
Pump operates, but output low on
both strokes
* 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.
8
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Troubleshooting
Before servicing this equipment always make sure to
Relieve the Pressure.
Note: Check all possible problems and solutions
before disassembling the pump.
Cause
Inadequate air supply pressure or
restricted air lines
Closed or clogged valves
Clogged fluid lines, hoses, valves,
etc.
Damaged air motor
Exhausted fluid supply
Worn or damaged air motor gasket,
packing, seal, etc.
Exhausted fluid supply
Held open or worn intake valve or
piston packings
Held open or worn piston or packings
Held open or worn intake valve
Inadequate air supply or restricted air
lines
Closed or clogged valves
Exhausted fluid supply
Clogged fluid lines, hoses, valves,
etc.
Packing nut too tight
Loose packing nut or worn packings
Solution
Increase air supply; clear
Open; clean
Clear*
Service air motor
Refill and reprime, or flush
Service air motor
Refill and reprime, or flush
Clear; service
Clear; service
Clear; service
Increase air supply; clear
Open; clean
Refill and reprime, or flush
Clear*
Loosen
Tighten; replace
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