If you more experienced folks can figure this out, I'd be obliged.
I took apart a completely rusty and non-functional 2466W whistle tender. It is now rehabilitated so that the trucks and rollers perform beautifully, I rewired everything, the relay works well, and the armature spins like a hero. I plugged up all the air gaps from replacing the backplate to install a new bearing, so there is no air loss from the seams. The only problem is
the darn thing won't whistle!
The armature spins rapidly and I can hear the brushes on the commutator give that dentist's drill effect, but no whistle! I don't have anything left to fix. It's fixed and runs, except it doesn't whistle.
Any thoughts from the brain trust ?
Thanks for your help!