Bench Testing: Rotor

To test rotor for an open circuit, use ohmmeter to check for continuity between slip rings of rotor. If there is no continuity, replace the rotor "1". See Fig 1 .
Using ohmmeter, check that there is no continuity between slip ring and rotor core. If there is continuity, replace rotor "1". See Fig 1 .
Check slip rings for roughness or scoring. If rough or scored, replace the rotor.
Using a vernier caliper, measure the slip ring diameter. If the diameter is less than minimum, replace the rotor (80A/105A). See Fig 2 .

Fig 1: Testing Rotor For Open Or Grounded Circuits

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Measuring Slip Ring Diameter (80A/105A)

Courtesy of SUZUKI OF AMERICA CORP.