center rollers appear normal. I will do some more homework and yet back to you guys. Thanks again-
One other thing you could try is power down your layout. Lift the loco ever so slightly by hand to reduce the drag from the traction tires and pull it down the track. If you still hear the clicking you know its the rollers.
Then you could do the same with one end completely off the rails and isolate which roller it is.
There isn't necessarily visual evidence of a defect that causes a roller to click. I received a a newly released caboose that has a clicking roller as well. I'm not sure if theres a flatspot on the inside of the roller or what, the roller looks fine.
Either way its merely a nuisance and nothing else.
BobbyD posted:"Have the roller clicking on a RailKing GP-9, is there anyway to eliminate it?"
I've found a drop of electrically conductive oil like Bachmans EZ Lube or Atlas' Conduct-A-Lube reduces the noise and it fades with run time.
Other than that, replacing the roller assembly is the obvious remedy, provided the replacement dosen't click