Hi all
Can I pick some brains again?I have a couple of Diesels(Farish)that slow down drastically when going through a radius.Also a Hall class steamer that I recently replaced the pick up retainer on.I initially dismantled bogies and checked/adjusted the tension between pickups and wheels on the diesels.
This only happens with my Co Co`s not Bo Bo`s and other locos.Should I investigate pickup contacts further or is there a more common cause that I`m missing?Ta Aron.

If they are the older Farish ones then it can indicate the worms want a spot of oil or the bearings want a touch of adjustment. It's usually the drive mechanism that causes any issues -  the pickup springs are really quite weak.

Alan

If it's only the Co-Co's and not the Bo-Bo's, it could be that the radius is too tight and the six wheel trucks are binding as they go around the curve?

Thanks guys That has given me something to try without too much dismantling.I have a class 37 thats fine so will try the oil first.