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F-25
TROUBLESHOOTING & REPAIR
F-25
POWER-ARC 4000
RHEOSTAT 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 troubleshooting assistance before you proceed.
Call 1-800—833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in accessing and removing the output control rheostat for main-
tenance or replacement.
MATERIALS NEEDED
5/16” Nut driver
Small slot head screw driver
9/16” Open or box end wrench
5/16” Open or box end wrench
Needle nose pliers
Wiring Diagram
WARNING
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This procedure takes approximately 25 minutes to perform.