Chapter 7
Maintenance and Repair Notes
DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19 Page 123
7.11 Platen Seal Replacement
Heed all security advices given in chapter 7.1.
Maintenance and repair work is only permitted for skilled personnel!
Always wear safety shoes, heat-resistant protective gloves, safety goggles and
protective clothing that cover all vulnerable parts of the body while working on
the heated unit! Risk of injury or severe burns!
Prior to disassembly:
• Heat the unit above the softening point of the material being pumped by the unit.
• Switch pump motor OFF.
• Activate the applicator to relieve pressure.
• Elevate the platen to full UP position to make work easier.
• Disconnect main electrical power.
• Disconnect air pressure at air control panel.
• Provide safety blocking under the platen.
Place safety blocking (lid and fiber separator sheet between the lid and platen)
under the platen to prevent platen lowering of platen.
There are two seals installed on the Bulk Melter’s platen. The type of seals or wipers
used on each Bulk Melter is specific to the application. Seal kits are available from
ITW Dynatec (see Ch. 11).
Clean the Seal Grooves
1. Using a wooden or plastic tool (to prevent damage to the seal), clean all material from
the seal grooves.
2. Lubricate ram plate grooves, bands and seals before assembly. Lubricate the seals
with a lubricant that is compatible with the material to be pumped. Check with your
material supplier to verify compatibility.
Replace T-Wiper, Hose or High Pressure O-ring Seal
1. Raise the platen up out of the drum. Remove the drum from the base. Wipe any fluid
from the platen.
2. Remove the seal’s clamps. Warming the platen will aid removal.
3. Carefully cut the old seal and remove it.
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