Maintenance | 4-23
ii. When the Thermal Insulation Tube is free from the Heater
Block, carefully pull the Junction Box/Thermal Insulation Tube
assembly away from the Heater Block. Take care to avoid dam-
aging the wires.
iii. Use the wire on the Heater Cartridge to pull it out from the
Heater Block.
If you are not able to break the connection:
i. On the Junction Box, remove the plug opposite the Thermal
Insulation Tube.
ii. If not already done, remove the Terminal Block.
iii. Locate the wire from the Heater Cartridge and pull it through
the port opposite the Thermal Insulation Tube. Then, use
the wire to pull the Heater Cartridge through the Thermal
Insulation Tube and Junction Box.
d. Using a soldering iron, remove the solder from the wire on the
Over-Temperature Switch that was cut earlier (the wire leading to
the Over-Temperature Switch). Pull back the wire from the Over-
Temperature Switch.
Remove any excess solder from the bottom of the Heater Block.
e. Install the new Heater Cartridge.
If you were able to break the connection:
i. Insert the new Heater Cartridge in the Heater Block.
ii. Separate the heater leads so that the shorter wire goes up
through the Heater Block to the Over-Temperature Switch.
Solder the wire to the terminal the original wire was removed
from on the Over-Temperature Switch.
Before continuing with the next step, be sure to inspect the threads on
the Thermal Insulation Tube and in the Heater Block. If any threads
have been damaged, replace the Thermal Insulation Tube only with an
AMETEK-supplied Thermal Insulation Tube. DO NOT REPLACE
WITH STANDARD ELECTRICAL CONDUIT.
!
CAUTION
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