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TROUBLESHOOTING & REPAIR
F-42 F-42
LN-9 Wire Feeder
WARNING
WIRE SPEED ACCURACY TEST
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 216-383-2531 or 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the LN-9 is providing the proper wire feed inches per revolution
of the drive roll.
MATERIALS NEEDED
Phillips head screw driver
Ruler or other linear measuring device