I purchased an American Flyer o gauge 429 0-6-0 switcher. It did not run. While taking the motor out of the shell I noticed a broken wire on the reverse unit. Soldered it back on. The motor ran but lots of sparks coming from brushes-commutator. I took the brush holder off and found 2 springs {different lengths} and 2 small brushes. The commutator has 1 plate that is black. The wire from the armature winding is broken from that segment. I've never seen an A/F armature from this time period so what are the 2 small brass looking spots in each pole? Is this right or is the commutator shot? Should I try to unwrap 1 round and re-solder?I've never seen this on any other Lionel, Ives, Marx,etc. the commutator is also pretty grooved where the brushes travel. Also found a piece of tinsel wrapped around in there. Thanks for any help, Dan
Replies sorted oldest to newest
I am a postwar American Flyer collector/operator. The brass pins are normal, some of the early postwar commutators also had these. The commutator is definitely worn but it should work ok after a good cleaning. Same with the brushes. New replacement springs and brushes would be good but these look like they are still functional. It is ok to remove one wrap of the wire that is broken and resolder. This is frequently done to repair the postwar armatures. I hope it runs well again after the cleanup and repairs.
Tom, Thanks for the response. I was going to try to unwrap and re-solder but wasn't quite sure if the brass pins were normal. See what happens, Thanks Dan
You might check to make sure the commutator segments are not loose, I've had a couple like that over the years both AF and Lionel. I have replaced the commutator on any 806 challenger using a part from an AF spur gear motor. Pretty sure I posted pics here a few years ago.
Here are a couple of pics from the 806 which is the spur gear 4-8-4. You can now see what the pins do from the bottom side as well. If you do do this, you MUST make sure you mark the exact clocking of the segments in relation to the windings or it will not work. They are not lined up with the windings.
Attachments
Well I removed 1 wrap, scraped the wire and re-soldered to the commutator. Put everything together and the motor ran but still alot of sparks coming from brushes/commutator. Guess next step will be to get a new set of brushes and springs. I've got Bob Hannon's book on rewinding armatures but not looking forward to doing so. Thanks, Dan
It goes without saying that sucker has to be deal flat and square, if it is wavy you need to skim cut it on a lathe or replace it. You can clean some abuse up with a file or sand paper.