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Old 17th May 2017
Ktransmissions Ktransmissions is offline
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Default First Train Horn Leslie question

I bought a leslie superfyton rs3l horn on ebay.
It was dead on two cylinders so i popped them apart and cleaned them up.

I ran a bead of "the right stuff" silicone and let it set up.

The next day i fired it up and one was weak.

During disassembly i flat sanded the ring seat that meets the steel diaphragm because it had deteriorated in a few spots.
This caused the horn not to work right so...

I chucked the housing in the lathe and was shocked at how out of whack the housing was.

I re-cut the outer edge that seals the outer edge of the diaphram and then re-cut a new seat into it.

Question,
Since the original edge waS NOT cut at the same depth as the outer edge, i need to know the optimum seat height.

Right now the seat is about .020 higher than the edge, giving the diaphragm a bit of pressure as its bolted together.

it works great now, but since i do not know great from right, i would rather have it right, before i mess up the diaphram or cause another unexpected issue, like tuning or something.

Since the other 2 horns are working, i didn't want to disturb them to check the seat height. at the same time

Sorry for the small pictures. i am away from home and my camera card. i had to copy the pics from an email.



Last edited by Ktransmissions; 17th May 2017 at 08:45 PM. Reason: Enlarged pics
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Old 19th May 2017
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danh@oasismfg.com danh@oasismfg.com is offline
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Default Re: First Train Horn Leslie question

Welcome to the forum. I know compressors, not horns, but someone here will help.
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Old 21st May 2017
CN8815 CN8815 is offline
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Default Re: First Train Horn Leslie question

Give this guy a shout.

https://sites.google.com/site/southbayhornworks/

Mike Muha is quite renowned around the horn collecting community. From what I remember, 0.02 inches sounds about right. Definitely email him though.

A lathe certainly would come in handy for me, as I greatly prefer buying used locomotive horns rather than one right out of the factory.
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Old 21st May 2017
Ktransmissions Ktransmissions is offline
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Talking Re: First Train Horn Leslie question

Thanks CN.
I took one of the other horns apart and came up with .015, so .018 is what i re-cut both to.
I figured it had to have a few thousandths wear on it.
It sounds Great now. The second one i took apart had a dark 1/2'' spot on the ring seat were it seals also, so i cut it.

It might be in my head, but the horn now sounds in tune, but i also turned the 44 horn around so they are all facing one direction.
Aluminum turn black when it wears. At least in an automatic trans, every time i see black ATF , i know an aluminum part is rubbing on something because of a bearing or thrust washer failure.
The black must come from air wearing away a pitted spot or from heat not being absorbed or something .
maybe a mechanical engineer could answer that.

Anyhow, If you need me to re-cut a seat, let me know. It only takes about 15 minutes. I used a live center and that worked out good. a bit of a squeeze getting the "bit" angle right, but i can do them 100 miles an hour now.
The other issue is the back cover has to be flat. Mine were not. I used a 6" x 48 belt sander for that and finished it off with a flat plate with 220.

I had a friend laughing his oven off after i told him to hang around while i drove by with my ford escort wagon. I had the horn already sitting upright with a full tank of air already in the car, so he had no idea what i was going to do.
I drive by and squeaked my little escort girlie horn and then with earplugs and headphones on, i gave her a 1 second, 3 second shot of air with the horns facing out the side window.
By the time i got around back to the house the guy was in tears.

You know the routine, " What the hell did you get that for"?
Hey, when experiencing life, one must take large mouthfuls, i told him.
Then i through in the fact that i had no idea why i got it, but always wanted one for parades and can always get my money back if i resell it, which, unless i am court ordered to do, Will not happen.

Last edited by Ktransmissions; 21st May 2017 at 11:16 AM.
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Old 21st May 2017
Ktransmissions Ktransmissions is offline
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Default Re: First Train Horn Leslie question

I checked out Mikes website. He is the guy to send stuff to get machined.
He probably has tricks to getting the most out of these things.
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