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Advice Re: Derailing on Peco Turnouts

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  • Member since
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Posted by Anonymous on Thursday, November 16, 2006 9:36 AM

I have been building an HO Code 83 layout. My turnouts are Peco Code 83. I have been testing my laying of track by simply running freight and passenger cars over the rails using light hand pressure. I find that cars are hanging up on the turnouts. Are there some general things I should troubleshoot or should be looking for? Thank you.

 

Dan

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    July 2006
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Posted by Dave-the-Train on Thursday, November 16, 2006 9:54 AM

Would you define "hanging up" please?

If you can get close enough to see can you identify what part of the trucks or other part of the car is not getting on with what part of the turnout please?

It is possible for the uncoupler bar on kadees to "hang up" in switches if it is out of position.  this makes a real hang up and stops the whole train.

  • Member since
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  • From: Sierra Vista, Arizona
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Posted by cacole on Thursday, November 16, 2006 11:12 AM

Two things to check are low coupler pins and wheel gauge.  Check all your couplers against a Kadee or similar coupler height gauge and check all of your wheels with an NMRA gauge.

Nearly all problems with rolling stock snagging or derailing on turnouts can be traced to couplers and wheels that need adjustment.

  • Member since
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  • 380 posts
Posted by Gary UK on Thursday, November 16, 2006 11:12 AM

Is it one or two specific cars in particular or any number?

Is it one turnout or all of them?

If its only one id suspect a problem with the turnout. If its all of the turnouts id expect its a problem with wheel dimentions or as already stated, couplings.

Check your back to back measurment of your wheel sets.

If their to narrow, they'l foul up on the ends of gaurd/check rails, principly the wing rails of the frog/crossing.

If their to wide, the wheel will tend to go the wrong side of the crossing nose/fine point.

  • Member since
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  • From: Northeast OH
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Posted by NeO6874 on Thursday, November 16, 2006 12:35 PM
great ideas from the guys above. 

One thing they missed though was the wheels themselves might be picking the points - easiest way to see if that's a culprit is to run your thumbnail along the point (when it's against the stock rail).  If your nail catches on anything, file the point a little bit, and test again.  Repeat until your thumbnail doesn't catch anymore.

-Dan

Builder of Bowser steam! Railimages Site

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Posted by Anonymous on Thursday, November 16, 2006 4:37 PM
Thank you, all, for the advice. Now I have several point to look for with troubleshooting. Once again, much appreciated!
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Posted by Anonymous on Thursday, November 16, 2006 4:53 PM
One way to figure out what's going on is to run a truck through the turnout(s) all by itself.  That way, you can more easily see what's happening.

Or . . . take a piece of clear plastic about 6 inches long and make a test car, with two trucks.  MicroMark sells one for  $11.25 at: http://www.ares-server.com/Ares/Ares.asp?MerchantID=RET01229&Action=Catalog&Type=Product&ID=80916.


This won't catch every problem, but can help determine whether a problem is with the turnout or the car.
  • Member since
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  • From: Sierra Vista, Arizona
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Posted by cacole on Tuesday, November 21, 2006 7:26 PM

Another thing to look at that I have ran across a couple of times:

Even though Peco turnouts are some of the best there are, I have ran into a couple that needed modification to prevent derailments.

Sometimes as a result of adverse temperature conditions during long-term storage or shipment, the plastic guide rail that is supposed to pull wheels away from the frog points gets warped out of position and opens up too much of a gap between the guide and the outer rail.  My solution has been to very carefully close the gap between the guide and outer rail by squeezing with a pair of pliers.  Don't overdo it, or the plastic may break off.

I've also read that some people have been gluing clear acetate to the inside of the guide rail to close up the gap.  The plastic that comes in new dress shirt collars seems to be good for this purpose and I have done that to a couple of Peco turnouts using super glue.

If squeezing with pliers doesn't do the trick, try the clear plastic.

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Posted by popbagz on Wednesday, April 23, 2014 12:53 PM
Dan, Have you solved your problem yet? I am having the same derailment problem but only with my Engines.
  • Member since
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  • From: Loveland, Colorado - Rural
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Posted by rgengineoiler on Saturday, April 26, 2014 8:41 AM

I am Peco C55 in N.  All my Peco turnouts are the best I have ever had.  One day I had one turnout that kept derailing an engine that never derailed before.  The solution turned out to be one wheel set on my Kato PA1 that for what ever reason had shifted just a touch in spacing using my NMRA gauge.  I couldn't believe that just a tink made a difference in the way the engine went over this turnout, but it did and I have had no other trouble with any Peco turnout or engine from that time on.

So now I know to check the wheel sets first before suspecting a Peco turnout.  They are very reliable for me.   Doug

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