[Saint Johnstoun]

I'll be quite honest and say that I have found that it is not worth repairing the Mainline chassis - most of my Mainline locos have been rechassied with Bachmann units.

I do however have a surplus Collett O-6-0 Mainline which is in original condition and it runs OK as far as they did with that mechanism.

Contact by private message might enable me to fulfill your need.

 

[Saint Johnstoun]

Mainline split chassis were notorious for ceasing to conduct effectively from the wheelsets to the hornways in the chassis. You need to remove the keeper plate, take out the wheelsets and clean everything thoroughly as a buildup of oil and grease can effect conductivity. Replace and then oil sparingly!