UP FEF Northern binding

A little judicious bending by hand (finger pressure) might restore your rod to proper alignment.  Go slowly and err on the side of caution.  (Above all else, do no harm!)

What is the product number of your Lionel FEF?  I've seen photos here on the Forum of the 2007 Lionel FEF production showing the beginnings of dreaded zinc pest.  If the frame or steam chest is warping, that could cause binding and you would have to get a replacement from Lionel.  Photos are always helpful!

Here are some photos. The product number is 6-11131.

I really doubt that bend is the issue, I see lots of them like that.

I ran it around the layout a couple times to get a sense of how severe the issue was. The engine was able to run, but you could hear a stutter/bounce by the sound of the slack coming from the cars behind it. I have the greyhound version as well. I tried it on the same track and it ran just fine. Maybe I just need to put some oil on the axles?

@Calebro posted:

I ran it around the layout a couple times to get a sense of how severe the issue was. The engine was able to run, but you could hear a stutter/bounce by the sound of the slack coming from the cars behind it. I have the greyhound version as well. I tried it on the same track and it ran just fine. Maybe I just need to put some oil on the axles?

Some FEF’s are known for zinc rot on the frame ( as noted by Ted ) . Although your model doesn’t exhibit the signs, your pictures are obscure and very dark. Take some better, well lit pictures, of the entire underside, and both side profile pics, focusing on the frame. Hopefully there’s no zinc rot, but I’d rule that out 100% before continuing with any other diagnostic….

Pat

Thanks for the pics.  The good news is, I don't see any evidence of zinc pest.

I think the main rod is close enough to that hex bolt, that there's potential for contact, especially on a curve if the lead axle has any side-to-side play.  If the bolt head has a shiny mark or scratches, it's rubbing for sure.  Make sure that the bolt is all the way in and snug.  Back it off a little, and then tighten it until it's seated.  Don't over-tighten it!  If you have basic repair skills, you could remove the main rod, or at least disconnect it, and try to straighten the end where it wraps around the eccentric.  It does look a little bent there, probably from snugly fitting the loco into its box.  My $.02

Are these pictures any better?

A little bit better, close in on the area I have circled. I see something going on with the frame in the area I’ve circled …….get close in, but well focused ….

Pat