Troubleshooting; Ram Assembly Troubleshooting - Graco Uni-Drum Instructions Manual

Troubleshooting

Troubleshooting

Ram Assembly Troubleshooting

Problem
Ram won't raise or lower
Ram raises or lowers too fast
Fluid squeezes past Follower Plate
wipers
Pump won't prime properly, or
pumps air
52
1. Follow Pressure Relief Procedures, page 34 and
Cause
Closed Main Air Shutoff Valve (P) or
clogged air line
Not enough air pressure
Worn or damaged piston
Safety Pins (M) still in place
Ram air pressure too high
Ram air pressure too high
Worn or damaged wipers
Not enough ram air pressure
Worn or damaged ram piston
Bent drum has stopped Follower
Plate
35, before checking or repairing the Uni-Drum
Supply System.
Open air valve, clear air line
Increase ram pressure
Replace piston. See Ram Piston
Service on page 46.
Remove pins.
Decrease ram air pressure
Decrease ram air pressure
Replace wipers. See Replacing
Wipers on page 48.
Increase ram pressure
Replace ram piston. See Ram
Piston Service on page 46.
Replace drum
Solution
309028ZAT