Nordson VersaBlue VB Series, Manual

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3 4444
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Repair
7-10
P/N 7105144G
2008 Nordson Corporation VersaBlue_NW
Replacing Gear Pump
(contd.)
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.
Fig. 7-17
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 any O-rings.
Required tool: Torque wrench
1. Apply high-temperature grease (Refer to section
Maintenance,
Processing Materials ) to the new pump and to any O-rings.
CAUTION: Pump types SF and DF seal metallically. Do not apply
high-temperature grease.
2. Apply high-temperature grease to the pump fixing screws (Refer to
Maintenance, Processing Materials) . Tighten screws crosswise using a
torque wrench. Torque: 25 Nm / 220 lbin.
3. Refer to Important Regarding Coupling
The axial offset, meaning the sum of the four gaps (4, Fig. 7-18), 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 angle offset: 1 °
NOTE: New magnets for the coupling monitoring should be installed now,
while the coupling is easily accessible. Refer to Replacing Coupling
Magnets.
4. Slide coupling half onto the shaft of the new pump.
5. Center the coupling disks (1) to one another and allow the coupling links
(2) to hang vertically (Refer to Fig. 7-18). Turn the coupling half on the
motor shaft to its position by hand.
Fig. 7-18
6. Tighten coupling screws (3). Torque: 36 Nm / 320 lbin.
7. Heat melter to operating temperature and open tank isolation valve
again.