3M Scotch-Weld Owner's Manual - Repair Procedures
© 3M 2006
13
Repair Procedures
G. Trigger Kit
Disconnect electrical and compressed air service.
Follow “Handle Disassembly Procedures”. Lift the
trigger assembly off the trigger pin and replace. Re-
assemble following reverse procedure.
Heat Shield Disassembly
Instructions
H. Heat Shield Kit
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. Reassemble,
following reverse procedure.
I. Heater Kit
Disconnect electrical and compressed air service.
Follow “Heat Shield Disassembly,” per procedure H. All
heater wires must be disconnected from their respective
terminal strips. With a suitable drift punch, drive the old
heaters out through the top of the heat block.
All four heaters should be replaced making sure to
reconnect the wires in the proper places. Refer to the
“Wiring Arrangement” and “Electrical Control”
diagrams, page 16. Be sure that heaters are bottomed
out in the heat block. They should not stick out above
the block more than 1/4’’. It may be necessary to gently
tap the heaters into place, but be careful not to crack the
ceramic.
To insure that heaters remain in place, gather all the
wires together approximately 1/2’’ below the heat block
and tightly attach the cable tie provided with the kit.
Heater Check-Out
Disconnect electrical and compressed air service.
Use Volt/Ohm Meter to check electrical continuity of
each heater. If continuity exists, heater is okay. First
remove heat shield. Heaters need not be removed from
the block. Check in the following sequence: left front,
right front, right rear, left rear. To start the check,
remove only one wire from its connection on the
terminal strip.
Place one probe from the meter on the connector of the
wire that has been removed, and with the other probe,
touch the matching connector on opposite side of the
applicator. If needle on Volt/Ohm Meter swings, heater
is okay.
Reconnect wire that was removed first, and continue
sequence. If one or more heaters are burned out, refer
to Repair Procedure, pages 11-14.