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TROUBLESHOOTING & REPAIR
F-93 F-93
COMMANDER 300
WARNING
DIODE REMOVAL AND REPLACEMENT
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
electrical 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 trou-
bleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
TEST DESCRIPTION
The following procedure will aid the technician in removing and replacing stud type diodes
to the aluminum heat sinks on the Commander 300.
MATERIALS NEEDED
7/16" Wrench
1" Open end wrench
Penetrox A13
Loctite 271
“Slip” type torque wrench
E2827-2 abrasive disc
This procedure should take approximately 25 minutes to perform.