Cjcrescent
Master Mechanic
CJ, I'd vote for a bad neoprene drive train connector since the engine is making screaming noises. I had an Overland 2-10-2 with one of those neoprene tubes and it never ran right until I finally replaced it with a proper universal joint.
Jim;
That's what I was hoping for but, I'm never that lucky.
In fact it was the worst possible thing it could be. A shot gearbox. The bearings were not good bronze bearings as the usual in brass locos, but were a very low quality brass. (Please see attachment.) The worm, which apparently was at least a better grade of brass, had reamed out the bearing to almost half of its depth. (#1 in drawing) Also the idler gear bearing, had worn at such an angle as to completely wear off the centering nub that held it in place in the gearbox itself. (#2  of drawing) No wonder it was screaming when it ran!
I was fortunate to have an older gearbox from the same company, Daiyoung, to replaced the damaged parts with.
I also inserted a couple of thrush washers to keep the damage from happening again. There were no washers in the original gearbox!
Oh, and that neoprene tubing? In perfect shape, but I replaced it anyway.
