4
3
Fig. 7‐18
1 1
2
3
44
44
Pump side
2
Fig. 7‐19
Coupling
Repair
7‐12
P/N 213828_11
2014 Nordson Corporation
VersaBlue_PPA
Detaching Gear Pump (contd.)
5. Place a container under the pump (3) to collect any material left.
6. Detach pump.
7. Clean sealing surface on the plate (4). If necessary, heat material residue
with a hot air fan, then remove.
8. Allow melter to cool to room temperature.
Attaching Gear Pump
NOTE: The gear pump may only be screwed on when the melter is cold.
NOTE: The sealing surfaces on the plate and the pump must be clean.
Always replace all O‐rings.
1. Apply high temperature grease (Refer to section Maintenance,
Processing Materials) to the new pump.
2. Apply high temperature grease to the fixing screws of the pump, then
tighten screws crosswise using a torque wrench; the tank must be cold
when screws are tightened. Torque: 25 Nm / 220 lbin
3. Refer to Important Regarding Coupling.
The axial offset, meaning the sum of the four gaps (4, Fig. 7‐19), must
result in at least 2 mm (0.08 in) of air to accommodate the heat expansion
during operation.
Permitted radial offset: 1 mm (0.04 in)
Permitted angular offset: 1°
4. Slide coupling half onto the shaft of the new pump.
NOTE: Couplings of the newer design are flattened on the pump side.
5. Center the coupling disks (1) to one another and allow the coupling links
(2) to hang vertically (Refer to Fig. 7‐19). Turn the coupling half on the
motor shaft to its position by hand.
6. Tighten coupling screws (3). Torque: 36 Nm / 320 lbin.
7. Heat melter to operating temperature and open tank isolation valve again.
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