Ram Troubleshooting - Graco Therm-O-Flow 20 EasyKey Instructions Manual

Ram Troubleshooting

Problem
Ram will not raise or lower.
Ram raises or lowers too fast.
Air leaks around cylinder rod.
Fluid squeezes past platen wiper.
Pump will not prime properly, or
pumps air.
Air pressure will not push platen out
of pail.
312094K
Cause
Closed main air valve or clogged air
line,
Not enough ram air pressure.
Worn or damaged ram piston.
Platen not fully up to temperature.
Ram air pressure too high.
Dented pail has stopped platen.
Ram "up / down" air pressure too
high.
Worn rod seal.
Ram air pressure too high.
Worn or damaged wiper.
Directional valve not in the down
position.
Closed main air valve or clogged air
line.
Not enough air pressure.
Worn or damaged ram piston.
Ram directional valve closed or
clogged.
Ram directional valve dirty, worn, or
damaged.
Dented pail has stopped platen.
Closed main air valve or clogged air
line.
Not enough blow-off air pressure.
Blow-off valve passage clogged.
Dented pail has stopped platen.
Wiper bonded to pail or pail liner.
Ram Troubleshooting
Solution
Open air valve; clear air line.
Increase ram air pressure.
Replace piston. See instruction man-
ual 310525.
Wait for full temperature.
Decrease ram air pressure.
Fix or replace pail.
Decrease ram air pressure.
Replace o-rings in guide sleeve. See
instruction manual 310525.
Decrease ram air pressure.
Replace wiper.
Position handle in the down position.
Open air valve; clear air line.
Increase air pressure.
Replace piston. See instruction man-
ual 310525.
Open valve; clear valve or exhaust.
Clean; repair valve.
Fix or replace pail.
Open air valve; clear air line.
Increase blow-off air pressure.
Clean valve passage.
Fix or replace pail.
Lubricate wiper with high tempera-
ture grease at every pail change.
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