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The 3M PG II Thermostat/TCO Kit includes a thermal cutout assembly, large machine screw, small machine screw and a thermostat sub-assembly. We recommend if you have 2-5 PG II glue guns in use you have one Thermostat/TCO Kit (9209) on hand, if you are operating 6-15 keep two on hand, and if you 16-20 keep three of this 3M kit in stock.
Disconnect electrical and compressed air service.
Remove the heat shield assembly by removing the two Phillips head screws from either side of the heat shield and the one Phillips head screw on the heat shield immediately above the loading chamber. The thermostat and TCO are assembled as a unit and are replaced as such no matter which component has failed.
The Quick-Slide clips should be removed from the thermostat. Remove the two screws holding the thermostat, and pry the thermostat from the block. Insert new thermostat. Make sure the rear rim of the thermostat is slipped into the slot in the heat block before affixing screws.
The thermal cutout assembly is then removed by disconnecting the Phillips head screw, holding the thermal cutout to the head block on the stand off strip. Remove the other end of the thermal cutout from the terminal strip with a small Phillips screwdriver. Procedure is reversed to replace the thermal cutout.
Our experts know the 3M PG II glue gun and adhesives backwards and forwards. Questions? Contact us about gun repair, adhesive recommendations and more.