ITW Dynatec DM55 DynaDrum - Page 133

Chapter 8
Troubleshooting
ITW Dynatec
DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19 Page 133
Problem Possible Cause Solution
Pump leaks at shaft.
Defective shaft seal.
Replace.
Pump leaks at base.
Defective bottom O-ring.
Replace.
Pump leaks at manifold.
Defective manifold O-ring.
Replace.
Material leaks past
platen seal.
1. Defective seal.
2. Material viscosity low.
1. Replace.
2. Reduce temperature or change
to a higher viscosity material.
Drum is difficult to
remove from platen.
1. Temperature too low.
2. Ram Up pressure too low.
3. Damaged drum.
4. Drum diameter out of
specifications.
5. Clamshell too tight.
1. Increase platen temperature.
2. Increase Ram Up pressure (15
psi max).
3. Do not use damaged drums.
4. Check diameter (22.2” min -
22.5” max).
5. Loosen clamshell adjustment.
Premature platen seal
failure.
1. Physical damage: seal cut by
dented drum lip.
2. Chemical reaction.
3. Excessive ram pressure/
speed on retract.
4. Over temperature.
5. Under temperature causing
seal to drag through unmelted
material.
1. Replace seal. Do not use
dented drums.
2. Replace seal. Review chemical
compatibility.
3. Replace seal. Reduce Ram Up
pressure/speed.
4. Replace seal. Reduce
temperature below 400°F
(200°C).
5. Increase temperature to
material softening point.