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The problem here is the spring bears the brunt of the heavy current when a short circuit happens when the caboose derails. The fix is add a short jumper wire from the pick-up arm to the frame of the pick-up assm, I think the new replacements have this jumper.

  If you are careful and work slow, you can unwind one turn of the spring with a pair of needle nose and re-bend the spring upwards to have tension on the pick-up arm downwards. this will restore sufficient pressure to the pick-up. 

I shop for used/broken cars at swap meets, etc., for parts.  A lot of stuff out there with cracked bodies, etc., cheap.  You can check the rollers and couplers, etc. and see which are good, and usually switch them out.  I have also had fair luck mounting used Bachman center rollers (there is tons of Bachman stuff used, cheap) on just about everything, with a little work - well, okay, sometimes a lot). 

Well I took the caboose apart, dropped the truck. Only to see that this couldn't of been made any harder to work on. There is no extra wire to even remove the truck without cutting it. 

 How does the trucks even come apart anyway ? It don't even have any screws to take the sides off.

 So far it seems like more trouble than it is even worth. I have been into this hobby for about 25 years and have done many repairs and to date this is the worst thing that I ever came across. Both in regards to crappy design (spring load) and over all extra needless hardship to work with.

I fixed all my K-line passenger cars without soldering or wiring. All you have to do is prevent the electrical current from flowing thru the spring, electricity always takes the path of least resistance(your spring) the thin wire called a spring. Get some fine wire and strip the insulation off, you only need a little of the insulation. Then take the small pieces of insulation and slip over each end of spring of each power pickup. You have to do both ends of spring. Photo below is passenger car.

Clem k

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Well it has worked on my K-Line 21" ESE since new. Don't know how long that is. And I run a Z4000 putting out 22 volts constant. If you do a jumper wire current still flows through the spring….. Here the current is not flowing through the spring, all I know is its worked over 15 yrs.

 

Clem k

 

Nice to hear from you Carl

 

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