6-2 Valco Cincinnati, Inc.
Section 6 - Maintenance
MC075 - MCP-4 Control Unit
If the system is idle for 30 days or longer, follow these steps:
1. Flush the entire glue supply system (including the pump or tank)
with clean water (see
Flushing the Glue System
in this section).
To flush the glue system, follow these steps:
Follow the procedures for your system.
These are general guidelines only.
1. Turn on the tank and any hoses or valves that are to be cleaned.
2. Pump out the old hot-melt adhesive, and then fill the tank with
hot-melt purge. Allow it to heat to at least 350 degrees F.
If you use a glue that operates at 250
degrees F, the tank only needs to be
heated to the standard operating
temperature.
3. Once the tank is molten, turn on the pump and engage the
valves.
4. Flow the old adhesive and purge through the valves until only
purge is extruding from the valves. When you reach this point,
turn the system power OFF and remove air from the pump.
5. Next, remove the lid cover screws on the surface of the melt
unit. This allows you to remove the pump and heating grid from
the tank itself.
6. Once the screws are removed, use gloves to lift the lid and
pump assembly out of the molten tank.
7. Place the lid and pump assembly in a vertical position on a
clean, solid, flat surface and allow the excessive adhesive to
slowly drip off of the fins.
8. Take the pot, lifting from the edges, and pour the molten
material into a sealed corrugated box.
9. Use a clean rag to wipe the tank clean thoroughly and dispose
of the rag. Now, you can re-insert the lid and pump assembly
into the pot and tighten the lid cover screws. This completes the
“clean and flush” process.
Performing Downtime Maintenance
- Continued
Flushing the
Glue System
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