Nordson VDK-MIDI TYPE 6, Operating Instructions Manual

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10
Type 6
E 2010
Gear Pump
Cleaning of the gear pumps
For the metering accuracy and life--time of gear--pumps a skillful cleaning
after operation is of great importance.
In order to clean the single parts of pumps from melt, they are to be heated
in an electric oven.
For the maximum temperature, consult the pump specifications!
Don’t use water or solvent without lubrication properties, because the
lubrication of the bearing points must be done by the cleaning fluid.
As soon as the melt gets flowing, the pumps are to be taken out of the oven
by means of suitable pliers, e.g. by means of universal grip water pump
pliers.
For disassembling the pumps are to be clamped into a bench vice and the
single parts of the pump are to be put into a perforated metal box.
Cool off the parts at room temperature after cleaning. The heated parts
should not be placed on cold surfaces.
After cleaning, the single parts must be checked for flutes, breaking of
edges of bores and gears etc.. If necessary, damaged parts can be
refinished by lapping or can be exchanged against new parts.
In case the cleaned single parts are not assembled again, they must be kept
dry in order to protect them against corrosion and oiled with means of
preservation.