Troubleshooting Chart - Graco 918372 Instructions Manual

Problem
Ram won't raise or lower.
Ram raises or lowers too fast.
Air leaks around cylinder rod.
Fluid squeezes past follower plate
wiper. i
Pump won't prime properly, or
pumps air.
Air pressure won't hold pail down
or push plate up.

Troubleshooting Chart

Cause(s)
Closed main air valve or clogged air
line.
Not enough air pressure.
Worn or damaged piston.
Hand valve closed or clogged.
Ram air pressure too high.
Worn rod seal.
Ram air pressure too high.
Worn or damaged wiper.
Closed main air valve or clogged air
line.
Not enough pump air pressure.
Worn or damaged piston.
Hand valve closed or clogged.
Hand valve dirty, worn or damaged.
Bent pail has stopped follower.
Closed main air valve or clogged air
line.
Not enough ram air pressure.
Valve passage clogged.
Worn piston seal.
Solution(s)
Open air valve, clear air line.
Increase ram pressure.
Replace piston. See procedure in
Service section of Form #310525.
Open, clear hand valve or exhaust.
Decrease ram air pressure.
Replace o-rings in guide sleeve.
See procedure in Service section of
Form #310525.
Decrease ram air pressure.
Replace wiper. See procedure on
page 16.
Open air valve, clear air line.
Increase pump pressure.
Replace piston. See procedure in
Service section of Form #310525.
Open, clear hand valve or exhaust.
Clean, service hand valve.
Replace pail.
Open air valve, clear air line.
Increase ram air pressure.
Clean valve passage.
Replace seal.
310526