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PROBLEM
Ram won't raise or lower
Ram won't raise or lower
Ram raises or lowers too fast
Air leaks around cylinder rod
Fluid squeezes past follower plate
wipers
i
Material pump won't prime proper-
ly, only pumps air.
Air pressure won't hold drum
down or push plate up
Troubleshooting
CAUSE
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 wipers
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 dam-
aged
Bent drum has stopped follower
Closed main air valve or clogged
air line
Not enough ram air pressure
Valve passage clogged
Worn piston seal
SOLUTION
Open air valve, clean air line
Increase ram pressure
Replace piston. See procedure in Form
#310523.
Open, clear hand valve or exhaust
Decrease ram air pressure
Replace o-rings in guide sleeve. See
procedure in form #310523.
Decrease ram air pressure
Replace wipers. See procedure on page
19
Open air valve, clear air line
increase pump pressure
Replace piston. See procedure in Form
# 310523.
Open, clear hand valve or exhaust
Clean, service hand valve
Replace drum
Open air valve, clear air line
Increase ram air pressure
Clean valve passage
Replace seal
310524
17
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