Technical data
Maintenance
5-10
P/N 7135049A
E 2007 Nordson Corporation
VBC_Siemens
Checking for Leakage (contd.)
Gear Pumps with Gland Bolt
The gear pump is equipped with a self-sealing pump shaft seal. Material
may seep out of the seal at irregular intervals. The gland bolt must then be
tightened.
NOTE: 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 can replace the pump shaft seal.
Tightening Gland Bolt
NOTE: Tighten only when the melter and the pump are warm.
Tighten the gland bolt approx. ΒΌ of a revolution in the operating direction of
the pump. If tightening is no longer possible, the gear pump must be
replaced.
Fig. 5-9
Tightening Fixing Screws
Normal heat cycling (heating and cooling) can cause the fixing screws to
become loose.
NOTE: Tighten the fixing screws only when the melter and the pump are
cold. Tighten only with a torque wrench (25 Nm / 220 Ibin).