Spartan horn sounds sick

[billybronco1]

Okay I decided to pull my horn apart to try and figure out why it sounds like a dead Ahooga. Motor seems to run just fine but one thing I noticed is the brass vee shaped contact on the vibration plate that the gear hits was slightly loose . Is this suppose to be rock solid tight and is it just reamed in there?

[Jon-Ohio]

Yes, it is supposed to be pressed solid tight into the diaphragm with the "chisel point" 90 degrees vertical relative to the motor armature frame. If it's loose, it's bad and the "chisel point" should be made from hardened steel not brass. " A&L makes the best new replacement diaphragm but a good original is preferable to a new one if it's in good shape and not worn down.

[billybronco1]

Okay I tightened up the chisel point and my mistake it looks to be a hard steel and in fairly good shape. I put it back together and no change. I see what I thought are alignment holes but I could be mistaken. I'm not sure if the chisel point is in the right alignment with the gear.

[portside]

Put a small amount of grease on the ratchet that rubs on the chisel V. If you haven't done that yet it should help.

[Bob C]

Have you turned the adjusting screw to see if it helps??

Bob

[billybronco1]

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The adjustment changes things but does not help. As the chisel was loose I think I should get a new diaphragm because I think it rotated a little and probably is not in the correct orientation even though I have it tight now.

[glenn in camino]

Also, clean the commutator with acetone.

[Ford1931]

I had one with similar symptoms. I put new gaskets on both sides of the diaphragm and the horn worked perfectly.

[Robert/Texas]

Mine does that on both of my A's about every 2 years or so. All I do is spray some non-flamable electrical cleaner on the commutator while it is spinning. Then I lube both ends of the armature with a little 3-in-1 oil. It works every time for me.

[billybronco1]

okay next question - is the gear on the end of the motor shaft suppose to be connected tight to the shaft (makes sense) mine is wobbly and I can spin it with my finger and the shaft does not turn. If I power it up the gear turns when the motor runs.

[Rowdy]

Yes, it should be tight on the armerature shaft. Rod

[billybronco1]

The nut is tight okay I will see if I can get it apart and whats going on - can you buy the gear?

[Rowdy]

Is the lockwasher under the nut missing? Rod

[billybronco1]

Right on the money no lock washer, I'm going to find a nice star washer - also quickly learned it is a reverse thread ...

[billybronco1]

Washer did the trick - I'm still going to replace the diaphragm because the chisel might get loose again and gaskets

thanks

[whirnot]

Put a small amount of grease on both ends of the shaft and make sure you oil the pads regularly, should be good to go.

[spdway1]

Check this out!
http://modelabasics.com/ahoogaHorn.html

[billybronco1]

Originally Posted by spdway1

Check this out!
http://modelabasics.com/ahoogaHorn.html

That is a sweet description of operation. I'm all back together and making lots of noise with a nice ahooga sound. Put the lock washer in, new diaphram