Industrial 1.6L Engine Electrical 3-23
STARTER MOTOR NOISE DIAGNOSIS
High-Pitched Whine During Cranking
Generator Assembly Bench Check
This test requires both a fully charged battery and a
generator test stand to operate the generator. The
generator can be tested quicker and easier while it is
still on the equipment. Refer to Generator Not Operat-
ing Properly.
1. Ensure the carbon pile is off before making connec-
tions as shown.
• The ground polarity of the generator and
battery must be the same.
• The battery must be fully charged.
• Use a 30-500 ohm resistor between the
battery and the BAT terminal of the generator.
2. Slowly increase the generator speed and observe the
voltage.
3. If the voltage is uncontrolled and increases above 16
volts, the rotor field is shorted, the regulator is not
working properly, or both. A shorted rotor field coil
can cause repeat regulator failure.
4. If the voltage is below 16 volts, increase speed and
turn on and adjust the carbon pile to obtain maximum
amperage output. Maintain the voltage above 13
volts.
5. If the output is within 15 amperes of the rated output,
the generator is good. If the output is not within 15
amperes of the rated output, replace the generator.
High-Pitched Whine After the Engine Fires
350774
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