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zw transformer

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  • Member since
    June 2010
  • From: georgia
  • 2 posts
zw transformer
Posted by etmgo on Friday, July 1, 2011 10:39 AM

i have a problem with my transformer, i am not getting any power to the U D post, all other post have power.  wondering if anyone has an idea as to the problem.  thanks for any comments.  

tom

  • Member since
    December 2001
  • From: Austin, TX
  • 10,090 posts
Posted by lionelsoni on Friday, July 1, 2011 11:01 AM

Look first for a broken wire inside the case.  It could also be a broken carbon roller.  Here is your transformer:  http://pictures.olsenstoy.com/searchcd31.htm?itm=671

Bob Nelson

  • Member since
    June 2010
  • From: georgia
  • 2 posts
Posted by etmgo on Friday, July 1, 2011 1:57 PM

thanks bob, i will look tonight.  i have just started to acquire older trains in the last 3 years and love working on them.  i quess my childhood love for my first lionel back in the early 50's is comming back to me.  again thanks.  tom mroczko  

tom

  • Member since
    July 2003
  • 1,786 posts
Posted by cwburfle on Friday, July 1, 2011 4:52 PM

Postwar ZW transformers have four "U" posts, all tied together with a metal bar. Sometimes some of the posts detach from the bar. In some cases, the phyical connection can look OK, but actually be disconnected.
Try using a different "U" post with your "D" post.
If it works, you do not have to fix the bad "U" post.

  • Member since
    November 2010
  • 993 posts
Posted by gunrunnerjohn on Friday, July 1, 2011 6:55 PM

I concur with the last statement, I've rebuilt half a dozen of these, and two of them had a couple of terminals detached from the common bar.

 

The good news is, there is a cheap fix that doesn't involve disassembling the transformer, which is somewhat of a PITA.  Many folks like www.ttender.com sell replacement posts that have a screw terminal.  You can remove the old terminal, drill out the common bar from the outside for the screw, and replace it. I bought a few of these for 75 cents each.

 

  • Member since
    November 2009
  • From: Bayville, New Jersey
  • 1,296 posts
Posted by Hudson#685 on Saturday, July 2, 2011 9:51 PM

Great tip, Thanks

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