DuraBlue II Customer Product Manual - 第102页

Service 5-12 Part 1126931_01  2018 Nordson Corporation Replacing a Pump (contd) 14. Slide motor assembly, including the motor coupling hub and sleeve, toward the pump until the coupling sleeve engages with pump coupling…

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Service
5-11
Part 1126931_01
2018 Nordson Corporation
8. See Figure 5‐7. Remove the pump screws (3) and then remove the pump
(2) and O‐rings (1).
1
2
3
Figure 5‐7 Replacing a pump
1 O‐rings 2 Pump 3 Pump screw
9. Clean the surface of the manifold where the pump mates to it.
10. Allow the melter to cool to room temperature.
11. Install the pump coupling hub on the pump shaft, ensure that it is flush
with the pump shaft, and tighten the hub set screws.
12. Apply O‐ring lubricant to new pump O‐rings and install them on the pump.
13. Apply anti‐seize lubricant to the pump screws and secure the new pump
to the manifold with the screws. Use a torque wrench to tighten the
screws in a criss‐cross manner to 25Nm(222 in.‐lb).
Service
5-12
Part 1126931_01
2018 Nordson Corporation
Replacing a Pump (contd)
14. Slide motor assembly, including the motor coupling hub and sleeve,
toward the pump until the coupling sleeve engages with pump coupling
hub.
15. Ensure that the coupling sleeve cannot move, then slide the motor
assembly back 4 mm (0.16 in.), as indicated in Figure 5‐8.
4 mm (0.16 in.)
Figure 5‐8 Moving the motor assembly back 4 mm (0.16 in.)
16. Tighten the screws that secure the motor to the base of the melter.
17. To ensure proper motor and pump shaft alignment, verify that you can
freely slide the coupling sleeve back and forth by about 4 mm (0.16 in.)
each way.
18. Restore the system to normal operation.
Hot melt flow path
Service
5-13
Part 1126931_01
2018 Nordson Corporation
Replacing the Adhesive Filter
DuraBlue II melters are equipped with a 100-mesh (0.15-mm) disposable
hot melt adhesive filter. The adhesive filter removes debris and char from
the hot melt as it flows from the tank. Hot melt flows from the inside to the
outside of the filter, trapping contaminants inside the filter. There is no need
to back-flush or clean the filter.
When the filter reaches the end of its service life, it should be replaced. The
factors that determine the service life of the filter are:
the type, grade, and purity of the solid-form hot melt
the set point temperature of the tank
the period of time that the hot melt remains in the tank
The filter should also be replaced when making the change to a different type
or grade of hot melt.
To determine the optimal service life for the filter, monitor and compare the
total number of hours that the heaters are on with observations of:
the purity of the dispensed hot melt
increases in operating pressure
the frequency of applicator nozzle replacement or cleaning
As an aid to ensuring that the filter is replaced at the end of its service life, the
melter is equipped with a service LED that turns on at the end of a
customer-defined time period. Refer to Setting Up the Melter in Section 3,
Installation, for information about the service interval time.