Background info-
This is a recently acquired 6026W tender. In rough shape. Rust on the steel motor parts, insulation on wires from roller pick-ups was bad. Overall neglect. But I’m always up for a challenge.
What I did-
Replaced both wires.
Disassembled motor. Carefully pressed impeller off of armature shaft. Cleaned lamination stack on armature and motor. Cleaned copper surfaces where brushes contact. Cleaned brushes. Cleaned bore where armature shaft rotates and brush pockets. Carefully reassembled all the above. Oiled bore for armature shaft.
Everything turned freely.
Free play of armature / impeller assembly similar to that of another working 6026W whistle tender.
All seems good, eh?
Hooked up test leads, applied about 10 volts from a 1033 transformer and turned whistle handle. Motor spins nice and fast, no apparent binding, BUT it only squeals, no whistle sound.
I can blow into the impeller opening in the air chamber and get a whistle sound.
I switched my test leads over to the working tender and applied the same 10 volts, all works well.
Direction of rotation matches that of the working tender, so I didn’t mess any wires up.
Anybody out there know what’s wrong?
Thank you in advance!
