3411 123 444412Repair7-10P/N 7105144G 2008 Nordson CorporationVersaBlue_NWReplacing 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 materialresidue with a hot air fan, then remove.8. Allow melter to cool to room temperature.Fig. 7-17Attaching Gear PumpNOTE: 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 wrench1. 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 applyhigh-temperature grease.2. Apply high-temperature grease to the pump fixing screws (Refer toMaintenance, Processing Materials). Tighten screws crosswise using atorque wrench. Torque: 25 Nm / 220 lbin.3. Refer to Important Regarding CouplingThe axial offset, meaning the sum of the four gaps (4, Fig. 7-18), mustresult in at least 2 mm (0.08 in) of air to accommodate the heatexpansion 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 CouplingMagnets.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 themotor shaft to its position by hand.Fig. 7-186. Tighten coupling screws (3). Torque: 36 Nm / 320 lbin.7. Heat melter to operating temperature and open tank isolation valveagain.
