Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid elec-
trical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshoot-
ing assistance before you proceed. Call 1-800-833-9353 (WELD).

DESCRIPTION

The following procedure will aid the technician in mounting stud type diodes to the aluminum
heat sinks on the Commander 400.

MATERIALS NEEDED

5/16” Nut driver
1/2” Open end wrench
Lincoln E1868 (Dow Corning 340) Heat Sink Compound
“Slip” type torque wrench
No. 000 fine steel wool

This procedure takes approximately 30 minutes to perform.

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