ITW Dynatec DM55 DynaDrum - Mechanical Troubleshooting Guide (for Piston Pump Models)

Chapter 8
Troubleshooting
ITW Dynatec
DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19 Page 131
8.2 Mechanical Troubleshooting Guide (for Piston Pump Models)
Note: This troubleshooting table is only a guideline. The possibility of having more than one problem
occurring at one time can obscure the problem and its resulting symptoms.
Problem Possible Cause Solution
No flow from applicator
when pump is running.
1. Excessive ram force into
drum is facing off liquid flow
to pump inlet.
2. Insufficient ram force not
charging liquid flow to pump
inlet.
3. Platen insufficiently purged.
4. Cold adhesive in hose or
manifold.
5. Applicator not energized.
6. Applicator faulty or fouled.
7. Piston pump check valves
fouled (off-beat stroking will
be evident).
8. Piston Pump air motor
pressure set too low.
9. Temperature set too low.
10. Blockage in hose, applicator
or manifold.
11. Material viscosity too high.
1. Reduce ram pressure.
2. Increase ram pressure.
3. Complete full purge cycle.
4. Check temperature of all zones.
Allow to heat for several
minutes before continuing.
5. Check solenoid for proper
output. Replace solenoid as
required.
6. Inspect and repair (or replace)
applicator.
7. Disassemble, clean and
reassemble pump inlet and
outlet check valve assemblies.
8. Increase air motor pressure.
9. Increase temperature.
10. Disassemble, clean and
reassemble.
11. Increase temperature to reduce
viscosity. Change to a lower
viscosity material.
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