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Hello friends!   I recently purchased a used 6-18252 Amtrak Dash 9 with TMCC and put it on my test stand and found the front truck is locked up.   Rear Truck, Sound and TMCC functions correctly.  Took the body off and I am able to rotate the fly wheel so the large gear between the 2 drive wheels rotate 1 full turn  then it stops.  Rotate it in reverse and the same thing happens at the exact same point it locked up in forward.  I am trying to gain access to the worm gear and geared axel and I cannot find any repair videos on “YouTube university” that help.  I wanted to see if anyone here can give me some guidance.  The engine looks like it may have never been run.  My SD70’s and SD80’s from the same era run flawlessly so I know this engine with a little repair will do the same.  

Thank you!

Bill

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Keystone Bill.    I have same engine, about a month ago same thing happened  tabled it when I had time.  You made me look at underside.. yep 2 tires stuck in truck  put one on & removed other.  put on test track runs both ways .... thanks to you I'm not removing shell just fighting new tires.    Hope you find your issue    Rick

Ron and Marty,  

I got the truck to separate from the motor the two small screws on the top one has the the wire to pick up power from the roller the other is next to it.  And the 2 on the under side.  Moving the trucks gears independently from the worm gear found a small spec of some debris on the large gear wedged in it.  Used my hobby knife to get it out of it.  So getting it lubed & assembled and I’ll let you know how the test run goes.  

Thanks a million guys!

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