Uncoupler/unloader wiring

Dan, I do agree that the caused is probably mechanical, but maybe caused by a bad connection which keeps the solenoid from fully activating.

As to the mechanism being simple, I always co0nsidered them a headache to get working properly.  BTW, my 3 milk cars do not have slider shoes.  I completely revamped all of my operating cars.  They have a single IT sensor strategically placed underneath, triggered by an incandescent grain-of-wheat between the rails.  An electronic circuit triggers a relay, which gets power for the solenoid from a center rail pickup roller

I just set up two stand test stands  One using fastrack i.e. transformer, terminal track and the "defective" remote uncoupling track and one using tubular track i.e. same transformer using the same power and ground posts.  Using the same milk car as before.  Same results milk car on the tubular works fine the wiring of the trucks and mechanism is in good shape.  Put the same car on the fastrack and solenoid wants to act backwards like the fastrack polarity has been switch?  All I know to do is a side by side physical inspection and a continuity check and check shoe to rail contact?  There has to be a wiring issue.  Is there a QA/inspection troubleshooting checklist?

Mike, bearing in mind your evaluation of your electrical troubleshooting ability, and that Dan & I have expressed the same opinions, and set out specific points to check, with no response, I'm going to step down.  Good luck.

I guess I'll be first one in fastrack-dom to have this unsolvable problem.  Now only thing I know to do is buy some fastrack adapter pieces and place them on the ends of the working tubular track remote operating track and call it a day.  Thanks everyone for their time and effort.  I just don't how the fastrack is reversing the operational characteristics of a solenoid.

Mike, one last pass at this, do you have any other operating car that you could try on the FT operating track?  What happens?

Guess what I tried my side dumping coal car on the suspect remote operating track and it works fine.  So I'm thinking the milk car's shoes and control rails don't have adequate contact and it doesn't if I push car to the car harder to the track.  On the tubular track the control rails have more knife like edge vice fastracks has A blunter edge.  So new/newer trucks might be in store in near future.

Good.  Swapping trucks might help.  Before you do that, check the wiring for loose connections or bad solder joints.  I have 2 postwar milk cars and use FT.  Both cars have all original parts and work fine on FT.