Troubleshooting
52
309028ZAT
Troubleshooting
1. Follow
35, before checking or repairing the Uni-Drum
Supply System.
Ram Assembly Troubleshooting
Problem
Cause
Solution
Ram won’t raise or lower
Closed Main Air Shutoff Valve (P) or
clogged air line
Open air valve, clear air line
Not enough air pressure
Increase ram pressure
Worn or damaged piston
Replace piston. See
on page 46.
Safety Pins (M) still in place
Remove pins.
Ram raises or lowers too fast
Ram air pressure too high
Decrease ram air pressure
Fluid squeezes past Follower Plate
wipers
Ram air pressure too high
Decrease ram air pressure
Worn or damaged wipers
Replace wipers. See
Pump won’t prime properly, or
pumps air
Not enough ram air pressure
Increase ram pressure
Worn or damaged ram piston
Replace ram piston. See
on page 46.
Bent drum has stopped Follower
Plate
Replace drum
Summary of Contents for 309028ZAT
Page 14: ...Component Identification 14 309028ZAT FIG 5 Pneumatic Logic Panel Interior AJ AK AL ...
Page 41: ...Junction Box Panel Service 309028ZAT 41 FIG 20 T10196 Pressure Switch Solenoid Valve ...
Page 75: ...Parts 309028ZAT 75 Follower Plate Assembly 241891 and 243510 FIG 32 ...
Page 77: ...Parts 309028ZAT 77 PLC Pneumatic Logic Panel FIG 33 915 909 905 915 910 917 906 ...
Page 78: ...Parts 78 309028ZAT FIG 34 945a 955 939a 912b 912a 914a 954a 909a 953a 901b 902b ...
Page 80: ...Parts 80 309028ZAT PLC Interface Accessory Kit 241838 and 24V775 FIG 35 ...
Page 82: ...Parts 82 309028ZAT Junction Box Panel 195320 and 119773 FIG 36 ...
Page 88: ...Parts 88 309028ZAT Elevator Assembly 241902 FIG 39 Ref Ref Ref ...