Generator Inner Parts: Rotor

Measure the resistance between the slip rings using a tester.

Fig 1: Measuring Resistance Between Slip Rings
Courtesy of MAZDA MOTORS CORP.
- If not within specification, replace the rotor.
  Generator rotor resistance (between slip rings) [20°C {68°F}]
- 1.8-2.2 ohms
Verify that there is no continuity between the slip ring and core using a tester.

Fig 2: Checking Continuity Between Slip Ring And Core
Courtesy of MAZDA MOTORS CORP.
- If there is continuity, replace the rotor.
Inspect the slip ring surface condition.
- If the slip ring surface is rough, use a lathe or fine sandpaper to make it smooth.