Horn stops working

[miff]

My horn will turn with no pressure on the diagram. But when I start to adjust it for the sound. ( a click at a time) when it starts to put pressure ( very little )on the diagram the arbor stops turning . With no pressure it spins fast and free. Any ideas , (it's an Ames horn) Miff

 

[ericr]

have you cleaned the commutator with sandpaper?

 

[heneste]

Also, if it hasn't been lightly oiled it may need the two-three drops on the felt pad

 

[Tom Wesenberg]

I've cleaned commutators with emery cloth while the armature spins. Between that and a few drops of oil on the felts, the horn blows great.

 

[Mike V. Florida]

Yup a good cleaning, inspection of the brushes, movement of the brushes in the holders, and lubing the front and rear of the shaft are in order.

http://modelabasics.com/horn.htm

 

[miff]

I want to thank you all for your suggestion on my horn. I want to thank Mike v Florida fro sending to horn basics by Payl R Modlin. Followed his problems and solutions . The horn works great . Miff

 

[Chuck Sea/Tac]

That's good it's working. Another maintenance area is the bullet connections and clips not clean enough. I also found a brush not in position correctly, yet still partially working.