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03-09-2013, 08:48 PM | #1 |
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Location: Rancho Santa Margarita, CA
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Adjusting ahooga horn
I can only get my Stewart horn to sound correctly with the motor cover off or with the cover on with the hold down screw put on very lightly.
Any suggestions? |
03-09-2013, 09:20 PM | #2 |
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Re: Adjusting ahooga horn
Check if the U shaped motor frame is secure/tight to the center flange.
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03-09-2013, 09:34 PM | #3 |
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Re: Adjusting ahooga horn
When I adjust the horn I always make the final adjustment after the cover is screwed on. The cover tension will pull on the frame a bit, so I often have to turn the adjustment screw one click. Also the original cover screw is only threaded enough to hold the cover in place. Repro screws have enough threads to screw them on too far is you tighten too much.
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03-09-2013, 10:41 PM | #4 |
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Re: Adjusting ahooga horn
Thoroughly clean the commutator/armature contacts with very fine sandpaper. Also the two wire connections at the base if they are the clip in type or similar.
As said above, adjust with the cover on. |
03-11-2013, 10:35 AM | #5 | |
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Re: Adjusting ahooga horn
Quote:
I dug up a nut to function as a "stop position" on the screw. I inserted the screw through the cover and put on the nut at different positions until I got the screw to tighten against the horn frame while not letting the cover bind on the housing. After doing the above, my horn sounds a lot better, but not perfect. (One note: it is very easy to short out the horn with the nut assembly described if you are not careful--I did so and saw smoke! Luckily, my main 30A fuse at the starter junction blew to save the day) How hard is it to find an original designed screw for the job? |
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03-11-2013, 11:34 AM | #6 | |
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Re: Adjusting ahooga horn
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Quote:
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Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole. |
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03-11-2013, 12:10 PM | #7 |
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Re: Adjusting ahooga horn
try A&L for the correct cover screw....i am sure al has it...
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03-11-2013, 01:03 PM | #8 |
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Location: new britain,ct 06052
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Re: Adjusting ahooga horn
The screw(s) I've obtained from a couple of diff sources threaded way too much.
Paul in CT |
03-11-2013, 01:36 PM | #9 |
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Re: Adjusting ahooga horn
If you look closely at the brush holder on the left, you can see a circle where a repro screw was run into it until it bent the side of the brush holder and locked the brush in place.
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03-11-2013, 01:57 PM | #10 |
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Re: Adjusting ahooga horn
Here's a picture of an original cover screw. Also note how the wire terminals plug in from the ends of the clips, and not under the sides. Also note the felt washer that fits around the adjustment screw before the cover goes on.
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03-11-2013, 03:21 PM | #11 |
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Re: Adjusting ahooga horn
Thanks Tom. Now I'm going to have o go out and look at my adjusting screws.
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03-11-2013, 04:09 PM | #12 |
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Re: Adjusting ahooga horn
I just ordered one from Bratton's....are they okay?
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03-11-2013, 05:40 PM | #13 |
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Re: Adjusting ahooga horn
Ahhhhh ................................felt washer. ! ! ! !
I wonder how many horns out there DON'T have the felt washer?? Source for the felt washer?? Snyder's doesn't show one. Paul in CT |
03-11-2013, 05:50 PM | #14 |
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Re: Adjusting ahooga horn
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http://MODELABASICS.com/ How Things Work on a Model "A" Ford Fordbarners, Feel free to use the pictures on my site to answer questions and create tutorials/tech articles. Last edited by 30ccpickup; 03-11-2013 at 05:57 PM. |
03-12-2013, 05:38 PM | #15 |
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Re: Adjusting ahooga horn
OK< felt washer not shown in pic above, nor in snyder's catalog. It looks like it's shown in mac's new catalog.
How important/effective is it?? Do I really need one?? SOURCE?? Paul in CT |
03-12-2013, 07:27 PM | #16 |
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Re: Adjusting ahooga horn
Paul,
It is labeled in the 2nd drawing as a dust felt. The dust felt helps to keep the inside of the horn clean. It is placed over the screw and between the cover and the adjusting bar creating a seal which prevents the dirt from entering the horn. I live on a dirt road and it helps. Paul
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10-31-2020, 01:24 AM | #17 |
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Re: Adjusting ahooga horn
Lost the Cover Screw for Horn does anyone know what size & threads per inch?
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10-31-2020, 07:01 AM | #18 | |
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Adjusting ahooga horn
Quote:
https://www.snydersantiqueauto.com/P...earchByKeyword Bratton’s has a different lock washer. https://www.brattons.com/horn-cover-screw.html Sent from my iPhone using Tapatalk Last edited by shew01; 10-31-2020 at 08:26 AM. |
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10-31-2020, 11:22 AM | #19 |
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Re: Adjusting ahooga horn
Sparton 8/32 x 13/16
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10-31-2020, 01:55 PM | #20 |
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Re: Adjusting ahooga horn
I had to add a aground to my horn. In fact, I have added a separate ground for each of the lights. Finally, I added a ground from the engine to the frame.
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11-01-2020, 06:53 AM | #21 |
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Re: Adjusting ahooga horn
Back off the adjustment and run the horn motor for about 15 sec. That will loosen things us and let the motor run at full speed. It never gets to run very long and a little spinning helps. Then try to adjust it.
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11-01-2020, 10:22 AM | #22 |
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Re: Adjusting ahooga horn
The lower priced motor driven ahooga horns adjust through the horn bell .
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11-01-2020, 10:48 AM | #23 | |
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Re: Adjusting ahooga horn
Quote:
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11-02-2020, 12:05 PM | #24 |
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Re: Adjusting ahooga horn
I have found that by adding a small O-ring onto the mounting screw on the inside of the cover will help with installing the cover and will retain the screw to the cover so it will not be lost.
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11-02-2020, 01:45 PM | #25 | |
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Re: Adjusting ahooga horn
Quote:
If your horn is wired as stock, the horn does not get its ground from the frame. (Probably the only electrical device in the Model A that doesn't). There are two wires going to the horn. One is always hot and comes right off the output of the generator's cut-out relay. The other wire comes from the horn button which provides ground when honked. |
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11-02-2020, 03:59 PM | #26 |
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Re: Adjusting ahooga horn
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Bill Cilker, Jr Unrestored 190A Victoria 45B, 160B & 189A Victoria Association President |
11-06-2020, 09:05 PM | #27 |
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Re: Adjusting ahooga horn
I found the felt washer/seal on my spare horn. The felt washer outside diameter is 5/8 ", the inside diameter is 5/16" and the thickness is 1/8".
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Bill Cilker, Jr Unrestored 190A Victoria 45B, 160B & 189A Victoria Association President |
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