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.

Testing And Repairing: Rotor

Test claw pole rotor for short circuits to ground using 40V AC tester. Measure resistance of exciter (field coil) in rotor with ohmmeter across slip rings. Resistance should be 4.0-4.4 ohms. If necessary, turn slip rings in a lathe, noting maximum runout of 0.001" (0.03 mm) and minimum diameter of 1.25" (31.5 mm). Maximum pole wheel runout should not exceed 0.002" (0.05 mm).