Ted, I am not so sure it would be a commutator bar. If it were you should have worn brushes down by now. My guess would be more like a winding broke loose and as rpms increase it moves out to hit the field shoes. If it were me I would disassemble the motor and pull out the armature. You will see the problem immediately. Either fix it or ship just the armature to be fixed, not the whole motor.
Mark Grasser -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Ted Lowe, FVEAA via EV Sent: Wednesday, March 04, 2015 11:34 AM To: Electric Vehicle Discussion List Subject: [EVDL] Damaged ADC FB1-4001A Motor Hi EVers, i have a 1992 S-10 conversion i've been driving for 14 years. It has an ADC FB1-4001A 9" motor. Last year i made a mistake and over-spun the motor with the clutch activated. The motor made a big nasty mechanical sound and i thought i would be walking home from there. But the motor still works as long as i keep the RPMs down (perhaps below 2000). If i go above that RPM, the banging sound happen again. i realize i'm driving 'on borrowed time' and want to get the motor fixed/rebuilt. So my questions are: 1) What is likely damaged inside? 2) What would be involved in getting it repaired? 3) What kind of parts and costs are likely involved? 4) Can this be a DIY project for a handy person? Thank you! Kind regards, ted _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
