Troubleshooting
10
307427ZAF
Troubleshooting
1.
Relieve the pressure.
2.
Check all other possible remedies before
disassembling the pump.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
PROBLEM
CAUSE
SOLUTION
The pump fails to operate.
Dirty or worn air motor.
Clean, service; see the separate
motor manual 307456.
Inadequate air supply or restricted
lines.
Clean lines or increase the air supply
(see Technical Data).
Closed or clogged air valves.
Open or clear the valves.
Clogged fluid hose or valve.
Clear the hose or valves.
Worn or damaged valves or seals.
Service the valves or seals.
The pump operates, but the output
is low on both strokes.
Clogged fluid hose or valve.
Clear the hose or valves.
Exhausted fluid supply.
Refill the fluid supply and reprime the
pump.
Worn or damaged valves or seals.
Service the valve or seals.
The pump operates, but the output
is low on the downstroke.
Held open or worn intake valve.
Clear or service the valve.
Worn or damaged valves or seals.
Service the valve or seals.
The pump operates, but the output
is low on the upstroke.
Held open or worn piston valve.
Clear or service the valve.
Worn or damaged valves or seals.
Service the valve or seals.
Erratic or accelerated operation.
Exhausted fluid supply.
Refill the fluid supply and reprime the
pump.
Broken air motor compression
spring.
Replace the spring.
