Maintenance
5‐7
P/N 213828_11
2014 Nordson Corporation
VersaBlue_PPA
Gear Pump
All melters delivered in December 2008 and later have pumps with a
Variseal seal instead of a gland.
Checking for Leakage
The gear pump is equipped with a shaft seal. Material may seep out along
the shaft at irregular intervals.
Pumps with Variseal: Replacing Pump Shaft Seal
Pumps with gland: Retighten gland.
Retighten gland
NOTE: Retighten only when melter is warm.
Retighten the gland approx. ¼ of a revolution in the operating direction of the
pump. If tightening is no longer possible, the gear pump must be replaced.
Replacing Pump Shaft Seal
When the pump shaft seal needs to be replaced, Nordson recommends
replacing the pump and sending the old one in to be repaired. Only trained
personnel using special assembly tools can replace the pump shaft seal.
Refer to section Repair and to the separate parts list.
Retightening Fixing Screws
Normal heat cycling (heating and cooling) can cause the fixing screws to
become loose.
NOTE: Retighten fixing screws only using a torque wrench (25 Nm / 220
Ibin) and when the melter is cold.
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