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  #121  
Old 09-11-19, 06:05
Jacques Reed Jacques Reed is offline
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Join Date: Jul 2012
Location: Victoria Australia
Posts: 584
Default Ford CMP horn- restoration

Good Day,

Here is another project I finished over the winter.

A year ago I looked at ways to repair rust holes in the diaphragm on a Ford horn. I put it on the back burner as I do when a solution doesn't quickly spring to mind.

A replacement diaphragm was not forthcoming so I thought of ways to seal the holes at least to prevent ingress of water. I discounted solder as that would probably fall out over time with vibration. Brazing or welding was out due to the possible heat effect on the diaphragm which I think is type of spring steel or tempered steel to allow for it to flex during vibration.

I found some vinyl inflatable pool patches in the shed and thought that might be a solution if glued to the diaphragm. Being thin, Light weight, and flexible it should not greatly affect the resonance of the diaphragm.

I tested a piece of it on a tin can using Sika Flex contact adhesive and it took all my strength to pull it of after it cured so I gave it a go.

It stuck well, and after reassembly and putting it across a 6V charger it blurted out a loud sound for the first time I would imagine in quite a few decades. Looking at the original condition I really didn't think it would work so it was a very pleasant surprise.

Cheers,
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Jacques Reed

Last edited by Jacques Reed; 09-11-19 at 06:11.
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  #122  
Old 09-11-19, 14:36
David Herbert David Herbert is offline
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Join Date: Mar 2010
Location: Ayrshire, Scotland - previously Suffolk
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Well done Jacques, a very creative solution !

David
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  #123  
Old 10-11-19, 03:28
Jacques Reed Jacques Reed is offline
VMVC & Early Ford V8 Club
 
Join Date: Jul 2012
Location: Victoria Australia
Posts: 584
Default Ford CMP transmission rebuild

Thanks David, Dont think I will have any problems with the horn. Won't be using it in Rome or Mexico City where the horns get more hours on them than the engines!

Jumping back to the transmission rebuild, I am almost ready to finish it off. I was awaiting some new clutch cross shaft bushings which just came. I also have a NOS cross shaft to use in the gear case. The shaft and bushings can be subject to quite a bit of wear and therefore sloppiness as shown in the photo.
Found a couple interesting things about the bushings: There are two sizes of them for Ford Flatheads: 0.945" OD and 1.000" OD. My truck uses the smaller OD type. I also found two types of material used: Solid bronze, and steel backed bronze lining. See the attached photo. The newly manufactured one is on the right, original steel backed on left, and original solid in middle.

I seem to remember long ago tapping the steel backed ones carefully into a case with the shaft installed to prevent damage. I am not so confident to do that to the softer solid bronze new ones without crumpling them. Presently started turning up a guide tool to pull them into the case instead, and yes. threaded rod will be used again.

Will post results when done but truck work is on hold for a week or so as I look after my four-legged best friend after some surgery last week.

Cheers,
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Jacques Reed

Last edited by Jacques Reed; 10-11-19 at 04:51. Reason: Corrected OD to 0.945"
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