Help with Flyer 302AC Loco

I have an American Flyer 302 AC locomotive.  The motor doesn't want to start on it's own.  If I apply power and spin the armature, it will run.  It isn't tight and has been cleaned and lubed as best I know how.  Do you think I have one segment of the armature shorted out?  I'm at a loss.  Any help would be greatly appreciated.

 

Harm

Original Post

My favorite little engine.   I would test the armature with a ohm meter, should be between 1 and 2 ohms to each segment.   Make sure you have good brush spring tenshion on both brushes, and a clean commentator and all electrical connections are soldered good.  Sounds like you have to spin it to get it started..

Also take a ohm reading on the field, should read about 1ohm or a bit more.

Marty

Martin Derouin posted:

My favorite little engine.   I would test the armature with a ohm meter, should be between 1 and 2 ohms to each segment.   Make sure you have good brush spring tenshion on both brushes, and a clean commentator and all electrical connections are soldered good.  Sounds like you have to spin it to get it started..

Also take a ohm reading on the field, should read about 1ohm or a bit more.

Marty

I agree with Marty.  Offhand, it sounds like a faulty armature segment.  That is, once rotation is started, it will bypass the offending segment and momentum will make it run.  I had a 300 series engine that had a broken wire to the commutator plate, and once soldered, it ran fine.  Armatures are out there as replacements. 

Those 300 series locomotives are usually like the Energizer Bunny.  Let us know if we can help, that's what we do! 

 

 

 

I've only ever seen this once and it is a long shot, has someone in the past fitted it with an armature from a DC motor as this explains why it needs a flick to start it. The tell tale indication of a DC armature is that the factory painted a segment of the plates a green colour.

Add Reply

Likes (0)


OGR Publishing, Inc. PO Box 218, Hilliard, OH 43026 330-757-3020
www.ogaugerr.com
×
×
×
×
×