Moel A horn quesrion

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Model T Ford Forum: Forum 2018: Moel A horn quesrion
Top of pagePrevious messageNext messageBottom of page Link to this message  By Warren F Rollins on Tuesday, August 07, 2018 - 07:27 pm:

Have a Model A horn with new gaskets and stainless diaphragm. Motor spins but no sound. What am I missing? Thanks.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Tuesday, August 07, 2018 - 07:32 pm:

Is it a real Model A horn or aftermarket? If it's a true Model A horn, there is a screw on what looks like a clamp on the back of the motor (it would stick thru the cover), this would need to be screwed in till it make the sound you like.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Allan Bennett - Australia on Tuesday, August 07, 2018 - 07:34 pm:

Warren. if you have no sound obviously the noise is missing!!!! Or you need new batteries in your hearing devices.

Allan from down under.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Warren F Rollins on Wednesday, August 08, 2018 - 09:45 am:

Mark, Model A horn. Diaphragm and gaskets are new Repo. Screw appears to do nothing , only motor turning. Allan, no horn sound. While failure of other things hearing is still good at least for today. I,ll try checking out again. Any reports of REPO horn diaphragm failures ?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Wednesday, August 08, 2018 - 10:05 am:

https://www.fordbarn.com/forum/showthread.php?t=99951
google "Model A Ford horn adjustment"
Lots of info.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Howard D. Dennis Byron, Georgia on Wednesday, August 08, 2018 - 10:10 am:

When everything else seems perfect sometimes you have to look for things that seem absolutely impossible Example: Any chance the diaphragm got reversed? The raised center would be visible through the bell.

Howard Dennis


Top of pagePrevious messageNext messageBottom of page Link to this message  By Tim Eckensviller - Thunder Bay, ON on Wednesday, August 08, 2018 - 10:12 am:

Warren, does the diaphragm have a pointed rivet in the centre? The motor should have a sort of metal crown on the end that strikes that rivet when it turns, that's what makes the noise. The tension between crown and rivet can be adjusted with a screw on the back of the horn to fine tune the sound.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Warren F Rollins on Wednesday, August 08, 2018 - 01:27 pm:

I have been out fooling with it. What pushes the armature closer to rivet. There appears to be gap between pointed rivet and crown that contacts when the crown is spinning. Beginning to wonder if armature is from another horn and is different or is it missing something that puts forward motion to crown part. Never owned a Model A.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Dewey, N. California on Wednesday, August 08, 2018 - 01:50 pm:

some versions have a ball bearing (single ball only) on the commutator end of the shaft that the adjuster pushes against. If it's missing, then yes, you won't be able to adjust it enough for it to strike the diaphragm "rivet".


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Wednesday, August 08, 2018 - 07:48 pm:

The rivet is not pointed it is wedge shaped. The wedge should be clocked to match the waffle patern in the wheel.


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