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Graco 3A0591U Ram Packages Manual De Usuario

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Troubleshooting
3A0591U
19
Troubleshooting
1.
2.
Check all possible remedies in the Troubleshooting 
Chart before disassembling the pump.
Problem
Cause
Solution
Ram will not raise or lower.
Closed air valve or clogged air line.
Open, clear. 
Not enough ram air pressure.
Increase.
Worn or damaged piston.
Replace. 
Hand valve closed or clogged.
Open, clear.
Ram raises and lowers too fast.
Air pressure is too high.
Decrease.
Travel rate is not properly adjusted.
Exposed Air Controls - open the 
director valve less for slower travel, 
more for faster travel.
Enclosed Air Controls - open the 
needle valve on the muffler more for 
slower downward travel, less for 
faster downward travel.
Air leaks around cylinder rod.
Worn rod seal.
Replace.
Fluid squeezes past ram plate wip-
ers.
Ram air pressure too high.
Decrease ram pressure.
Worn or damaged wipers.
Replace.
Inflatable seal pressure too low.
Increase seal pressure
Pump will not prime properly or 
pumps air.
Closed air valve or clogged air line.
Open, clear.
Not enough air pressure.
Increase.
Worn or damaged piston.
Replace. See pump manual.
Hand valve closed or clogged.
Open, clear.
Hand valve is dirty, worn, or dam-
aged.
Clean, service.
Air assist valve will not hold drum 
down or push plate up.
Closed air valve or clogged air line.
Open, clear.
Not enough air pressure.
Increase.
Valve passage clogged.
Clean.
Seal pressure builds when drum 
tapers, activating the automatic pres-
sure relief.
Seal bleed-off valve (BL) is closed