If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.

PROBLEMS
(SYMPTOMS)

POSSIBLE AREAS OF
MISADJUSTMENT(S)

RECOMMENDED
COURSE OF ACTION

OUTPUT PROBLEMS

The welding output varies abnor-
mally. The auxiliary output remains
constant. The engine is operating
correctly.

1. May be a normal condition. The

machine will normally lose
some output as the components
get heated.

2. Check for loose, worn, dirty, or

poorly seated DC generator
brushes.

3. The armature commutator may

need cleaning.

4. Check for loose or faulty welding

cables.

1. Check the Fine Current

Adjustment rheostat for resis-
tance and proper operation.
Normal resistance is 64 ohms.
Check associated wires for
loose or faulty connections. See
the Wiring Diagram.

2. Perform the

Field Shunt

Winding

Test.

3. Check the Current Range

Selector switch and contacts for
proper operation.

4. While the machine is loaded,

check the interpole and series
coils for signs of “arcing.” This
condition would point to shorted
turns in the “arcing” coil.

5. The main armature may be

faulty. Check for grounds.

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