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 engine starts and runs at cor-
rect speed, but there is no, or very
low, welder output voltage. The AC
auxiliary output voltage is normal.

1. Check for loose or missing

brushes in the welding genera-
tor.

2. Check the welding cables for

loose or faulty connections.

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

Shunt Field

Winding

Test.

3. Check the continuity of the inter-

pole coils.

They should show

continuity from the positive
brush holders to the positive
output terminal and should NOT
be grounded to the generator
frame.

4. Check the continuity of the

series coils. They should show
continuity from the negative
brush holders, through the
Current Range Selector switch,
to the negative output terminal
and should NOT be grounded.
Also check the Selector switch
for proper operation.

5. The main armature may be

faulty. Check for grounds and/or
shorts.

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