Lincoln Electric CLASSIC SVM194-A - Manuel (Page 158)

FLASHING VOLTAGE TEST PROCEDURE (continued)
PROCEDURE
1. Remove the cover from the exciter / auxiliary
power alternator.
2. Connect the volt meter probes to the brush ter-
minals. See the wiring diagram.
3. Remove one of the AC input leads from the field
bridge rectifier.
4. Set the idle switch to "HIGH" and the
RUN/STOP switch to "RUN", and start the
engine.
NOTE: The meter should read about 4 to 6 VDC. If
this voltage reading is correct, the test is
complete. If the voltage measures zero or
significantly lower than specified check for
the following:
• An open flashing diode.
• A poor connection in the flashing circuit.
• Polarity of the main generator may be
reversed.
• The rotor winding maybe shorted,
• The field bridge rectifier may be shorted.
5. Reconnect the AC lead to the Field Bridge.
6. With the engine running at High speed, the nor-
mal rotor voltage is 123 to 133VDC.
TROUBLESHOOTING AND REPAIR F-36 F-36
CLASSIC® 300D & 300G
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