October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Rotor Test

Using an ohmmeter, measure resistance between rotor and slip rings. Perform STEP 1. See Fig 1 . If resistance is less than 5 ohms, replace rotor.
Using an ohmmeter, measure resistance between slip rings. Perform STEP 2. See Fig 1 . If resistance is greater than 3.5 ohms, replace rotor.

Fig 1: Testing Generator Rotor

Courtesy of GENERAL MOTORS CORP.