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Service and repair should be performed only by 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 1-888-935-3877.
TEST DESCRIPTION
This test will determine if the engine is operating at the correct RPM, for both high and low
idle positions.
MATERIALS NEEDED
Miscellaneous hand tools
Strobe tachometer
Frequency counter or Multimeter with frequency counter function
Bright colored marking pencil or marker
Note: The engine RPM on the Classic® 300G and 300D with the Kubota engine is not
adjustable. The electronic modules on these machines maintain RPM based on
internal programming and the position of the RPM adjustment potentiometer or
"Custom Arc" control. RPM should still be checked to determine if these sys-
tems are functioning correctly.
ENGINE RPM ADJUSTMENT TEST PROCEDURE
TROUBLESHOOTING AND REPAIR
F-31 F-31
CLASSIC® 300D & 300G
WARNING
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