Troubleshooting - Graco Fast-Flo Instructions And Parts List

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
The pump fails to operate.
The pump operates, but the output
is low on both strokes.
The pump operates, but the output
is low on the downstroke.
The pump operates, but the output
is low on the upstroke.
Erratic or accelerated operation.

Troubleshooting

1. Relieve the pressure.
2. Check all other possible remedies before disas-
CAUSE
Dirty or worn air motor.
Inadequate air supply or
lines.
Closed or clogged air valves.
Clogged fluid hose or valve.
Worn or damaged valves or seals.
Clogged fluid hose or valve.
Exhausted fluid supply.
Worn or damaged valves or seals.
Held open or worn intake valve.
Worn or damaged valves or seals.
Held open or worn piston valve.
Worn or damaged valves or seals.
Exhausted fluid supply.
Broken air motor compression spring. Replace the spring.
sembling the pump.
SOLUTION
Clean, service; see the separate motor
manual 307–456.
restricted Clean lines or increase the air supply
(see Technical Data).
Open or clear the valves.
Clear the hose or valves.
Service the valves or seals.
Clear the hose or valves.
Refill the fluid supply and reprime the
pump.
Service the valves or seals.
Clear or service the valve.
Service the valves or seals.
Clear or service the valve.
Service the valves or seals.
Refill the fluid supply and reprime the
pump.