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WELDING PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
The welding arc is “cold.” The
engine runs normally (3700 RPM,
no load). Auxiliary power is func -
tioning normally.
1. Check for loose or faulty con -
nections at the weld output
terminals and welding cable con-
nections.
2. The welding cable may be too
long or coiled, causing an exces-
sive voltage drop.
1. Check for the correct open cir-
cuit voltage (OCV) at the welder
output terminals – 66 VAC is
normal.
If the correct voltage is present
at the output terminals, check
for loose connections on the
heavy current-carrying leads
inside the BULLDOG 140. See
the Wiring Diagram.
2. If the OCV is low at the welder
output terminals, perform
Engine Throttle Adjustment
Test.
3. Check for shorted or grounded
windings in the reactor (L1) and
also in the main stator.
See the Wiring Diagram.
TROUBLESHOOTING AND REPAIR
F-11 F-11
BULLDOG® 140
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