Ram Troubleshooting - Graco D60 Operation

Ram Troubleshooting

Check all possible problems before disassembling the ram, pump, or platen. Refer to the appropriate pump manual
for pump troubleshooting.
Problem
Ram will not raise or Closed air valve or
lower. clogged air line.
Not enough air pres-
sure.
Worn or damaged
piston.
Hand valve closed
or clogged.
Ram raises and low- Air pressure is too
ers too fast. high.
Air leaks around cyl- Worn rod seal.
inder rod.
Fluid squeezes past Air pressure too
ram plate wipers. high.
Worn or damaged
wipers.
Pump will not prime Closed air valve or
properly or pumps clogged air line.
air.
Not enough air pres-
sure.
Worn or damaged
piston.
Hand valve closed
or clogged.
Hand valve is dirty,
worn, or damaged.
Air assist valve will Closed air valve or
not hold drum down clogged air line.
or push plate up.
Not enough air pres-
sure.
Valve passage
clogged.
3A5379B
Cause
Open, clear.
Increase.
Replace. See Supply Unit Repair on page 36.
Open, clear.
Decrease.
Replace. See Supply Unit Repair on page 36.
Decrease.
Replace. See Remove and Reinstall Wipers on page 18.
Open, clear.
Increase.
Replace. See pump manual.
Open, clear. See Platen Maintenance on page 17.
Clean, service.
Open, clear. See Platen Maintenance on page 17.
Increase.
Clean. See Platen Maintenance on page 17.
Ram Troubleshooting
Solution
23