Chapter 5
Maintenance and Repair Notes
ITW Dynatec
UFD Applicator, Manual 40-43, Rev. 6.16
Page 47
Replacement of Air Preheater Heater Cartridges
WARNING
Heed all security advices given in Chapter 5.1.
Maintenance and repair work is only permitted for skilled personnel!
See illustration on previous page for parts locations.
1. Stop all motors.
2. Turn the ASU OFF and relieve all system pressure.
Switch the unit voltage-free and pressureless.
Guard the unit against unauthorized restarting.
Relieve the adhesive pressure by following the instructions under Chapter 5.4
“Relieving Adhesive Pressure”.
3. Disconnect the service block’s electrical cable assembly from the hose and disconnect
the preheater’s cable assembly from its cable extension.
4. Remove the M4 screws and M5 screws from the wire cover. Remove the wire cover.
5. Disconnect the heater leads from the ceramic terminal blocks.
6. Locate the non-functioning heater with a multimeter.
7. a. If one of the 10mm heaters is non-functioning, remove and replace it at this time.
Apply a thin film of thermal paste to the new heater before installation.
b. To replace the 8mm heater: remove the two M3 screws holding the left-side cover.
Remove the cover. Remove and replace the 8mm heater. Apply a thin film of thermal
paste to the new heater before installation.
8. Reconnect all heaters to the terminal blocks, making sure that no strands of wire are
protruding from the terminal blocks.
9. Replace the left-side cover if removed. Replace the wire cover.
The Applicator is now ready for installation and service.
Replacement of Service Block Temperature Sensor
WARNING
Heed all security advices given in Chapter 5.1.
Maintenance and repair work is only permitted for skilled personnel!
Note: a High-Temp Splice Kit (PN 102645) is required for this procedure.
See illustration on previous page for parts locations.
1. Stop all motors.
2. Turn the ASU OFF and relieve all system pressure.
Switch the unit voltage-free and pressureless.
Guard the unit against unauthorized restarting.
Relieve the adhesive pressure by following the instructions under Chapter 5.4
“Relieving Adhesive Pressure”.
3. Disconnect the service block’s electrical cable assembly from the hose and disconnect
the preheater’s cable assembly from its cable extension.