STARTING AND CHARGING 6D3–7
Inspections and Repair
Stator
1. Check the stator for damage, loose connections, and
discolored windings.
2. Use a circuit tester to check for continuity between
each pair of stator coil leads (1). Replace the stator if
there is no continuity.
3. Use a circuit tester to check for continuity between
each of the stator coil leads (1) and the stator core
(2). Replace the stator if there is no continuity.
Rotor
1. Turn the rotor. Listen for bearing noise (a scraping
sound). Feel for rough rotation. Replace the rotor if
either of these conditions is present.
2. Check for grease leakage. If leakage is minimal,
wipe it away. If leakage is excessive, replace the
rotor.
NOTE: It is recommended that inspection be made with
the bearing fitted to the rotor shaft.Coil Assembly
Coil
Use an ohmmeter to measure the coil resistance
between both terminals (1) and the terminal plate (2).
Replace the coil assembly if the resistance is outside the
specifications.
Coil resistance at 20°C: 4.5 – 5.2 ohms
Rectifier
1. Use a circuit tester to test for continuity between
each diode terminal (2) and the positive heat sink.
Test in both directions.
If there is continuity and/or an open circuit in both
directions, the rectifier must be replaced.
2. Use a circuit tester to test for continuity between
each diode terminal (2) and the negative heat sink.
Test in both directions.
If there is continuity and/or an open circuit in both
directions, the rectifier must be replaced.
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