American Flyer 302 help?

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  • Member since
    February, 2018
  • 5 posts
American Flyer 302 help?
Posted by BW23 on Monday, February 05, 2018 8:27 PM

Hello I'm new to the forum and have a question. I have a early model 302 that will only run forward. I know the reverse unit is good and i have also tried the reverse unit from my 325ac and it gives the same problem with both units. Runs great in foward has new brushes as well. Wiring tests good. Now when it goes in reverse it just turns a tiny bit then heats up. Doesn't have any binding I can turn it by hand easy. Any help would be great. Thank you.

  • Member since
    September, 2010
  • From: Parma Heights Ohio
  • 2,253 posts
Posted by Penny Trains on Tuesday, February 06, 2018 6:27 PM

Welcome aboard!  I'm no good with reverse units, but there are a lot of people on here who are!  Big Smile

Becky

A waking Lithium Flower just about to bloom

  • Member since
    December, 2001
  • From: Austin, TX
  • 9,687 posts
Posted by lionelsoni on Tuesday, February 06, 2018 6:56 PM

Look for a short circuit in the locomotive between one of the wires to a motor brush and one of the wires to the motor field winding.  There are several ways that such a connection can duplicate a correct reversing-unit connection in one direction, but shunt current around the armature or the field when you try to run the other way and prevent the motor from running.

Bob Nelson

  • Member since
    October, 2006
  • 78 posts
Posted by Laurastom on Wednesday, February 07, 2018 10:06 AM
Your problem description states the motor heats up when it tries to reverse. If your 302 has a flat and not a drum style commutator a likely cause is the commutator is shorting against the ends of the brass brush tubes. This can be a problem with Gilbert steam engine motors. Take off the bakelite brush holder assembly and add a thin washer to the shaft, then reassemble. There may already be a washer on the worm gear end of the commutator shaft. If so that can be moved to the other end of the shaft to see if it fixes the problem.
  • Member since
    February, 2018
  • 5 posts
Posted by BW23 on Wednesday, February 07, 2018 9:53 PM

Thank you for the help. I'll give it a try and keep testing.

  • Member since
    February, 2018
  • 5 posts
Posted by BW23 on Friday, March 02, 2018 11:19 PM

Found the problem the previous owner wired it like a 5 wire setup. Changed the two that were out of place and it runs great. 

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