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12-08-2013, 02:56 PM | #1 |
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Sparton Horn Overhaul
Hi All
I've just started looking at the non working Sparton horn on my 1929 Sport Coupe, and I've had a look around for advice on how far gone these need to be before they are deemed unrepairable by an amateur, and not found too much. Mine looks very much its 80 odd years, and has the adjusting screw missing. If I apply voltage to the terminals the motor will occasionally turn very slowly and then stop. I wonder if anyone can please take a look at the attached pic and advise of the best way to go, or perhaps point me at a thread or article? I think my first action will be to give it all a doing with electrical switch cleaner? Thanks Kevin |
12-08-2013, 03:22 PM | #2 |
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Re: Sparton Horn Overhaul
Its good that it turns over so it isn't shorted out. Start with a good cleaning with electrical cleaner, clean the copper armature with a scotch pad and then lube the shaft at both ends. I think that will make it work.
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12-08-2013, 03:40 PM | #3 |
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Re: Sparton Horn Overhaul
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12-08-2013, 04:15 PM | #4 | |
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Re: Sparton Horn Overhaul
Quote:
You might get the idea this kind of foolishness makes me a little upset. You'd be right!
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12-08-2013, 05:30 PM | #5 |
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Re: Sparton Horn Overhaul
I do not endorse these videos as for being for fine point judging but they do show the basics of the Sparton horn and dissassembly for anyone who has never had one taken apart. These Youtube videos come up first with any search on the Internet so to correct this someone needs to take up the challenge of posting a better one on Youtube to higher standards.
Afraid to post any more. Dave |
12-08-2013, 05:56 PM | #6 |
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Re: Sparton Horn Overhaul
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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. |
12-08-2013, 08:02 PM | #7 |
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Re: Sparton Horn Overhaul
30ccpickup - I must say you have a firm grip on computer generated information. Thank you for your excellent work.
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12-08-2013, 08:08 PM | #8 | |
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Re: Sparton Horn Overhaul
Quote:
Don't take it personally.
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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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12-08-2013, 08:48 PM | #9 |
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Re: Sparton Horn Overhaul
I agree with all of what 1930 coupe just said except I wouldn't replace the brushes unless they are too worn and need to be replaced. However, they must be clean as he said, and I usually find a fair amount of oil and dirt in them. Carb spray and a blow gun work well to clean the brushes.
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12-08-2013, 09:09 PM | #10 | |
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Re: Sparton Horn Overhaul
Quote:
As a side note, I just revisited this Youtube video site and it has more hits / viewers then most of the Ford Barn threads. So lots of people have viewed the four part Sparton horn videos that he posted and as with anything on the Internet it is up to the viewers to decide if it a useful video. Also it looks now like a FB member has just commented on this video today with a negative to the poster of the video. Here is the video poster's defensive reply back to him: "JellyrollHorton, please share a video of your expertise on properly restoring a horn like this. I don't profess to be a professional, just sharing what I did know. I tried to find something on Youtube, but there wasn't anything to be found. There was little else to be found anywhere else either. Rather than just criticizing my video, show us how it is done properly. Thank you. I appreciate your taking the time to stop by. George" So he as well as I put out the challenge again for someone with the knowledge to post a better Horn video on Youtube that will become the Golden Standard for the younger generation that is getting their Model A info off of the Internet and not always from the FB members. It takes a lot of time and effort to produce any video to post on an Internet site and I am sure these posters do not mean to do any harm and they probably would appreciate helpful comments about their video to improve the information they presented over just being bashed about it... |
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12-08-2013, 10:30 PM | #11 |
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Re: Sparton Horn Overhaul
I would mirror what Tom said, but I would first spray some WD40 on the rear shaft where it goes through the frame, and spin the armature by hand to clean it out. There is no real bushing there and with the amount of rust that is shown I would want to get it out as much as possible. The proceed as usual.
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12-08-2013, 11:48 PM | #12 |
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Re: Sparton Horn Overhaul
you can do what you want with WD40 only thing Iwould use for is to spray inside of distubator cap that stuff will gum up things and make it twice as hard to clean have a blessed day
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12-09-2013, 06:28 AM | #13 | |
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Re: Sparton Horn Overhaul
Quote:
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12-09-2013, 01:02 PM | #14 | |
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Re: Sparton Horn Overhaul
Quote:
I will assume that you are not just being a smart aleck, but that you sincerely want to know how to service a horn. If that assumption is correct, read Volume I of "How to Restore Your Model A."
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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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12-09-2013, 01:18 PM | #15 |
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Re: Sparton Horn Overhaul
Thanks to everyone for the great responses, really gives me a good starting point
Regards Kevin |
12-09-2013, 02:50 PM | #16 |
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Re: Sparton Horn Overhaul
Here is what I would do, but it may be more than you're wanting to get into right now. If you do proceed, take numerous photographs as you take things apart so you know how they go back together.
1. Order new brushes, brush holders, brush springs, connectors, diaphragm, diaphragm gaskets, top and bottom armature springs, adjustment arm, adjustment screw, felts, and flange bolts from Bert's or others 2. Remove the six flange bolts that attach the motor to the bell 3. Unsolder the wires that lead to the connectors 4. Remove the nut at the bottom of the armature 5. Remove the two bolts that hold the frame on 6. Pull the armature out 7. Replace every electrical part except the field coils and armature 8. Clean the commutate with scotch bright and a toothpick 9. Optionally blast, prime, and repaint metal parts 10. Reassemble according to your photos 11. Light oil on armature felts 12. Adjust for optimal sound (when adjusted correctly, you should hear three distinct sounds: Aghh-ooooo-gaaah) Pay special attention to where cardboard insulators go. When finished, there should be no continuity from anything electrical to ground. If there is, you may have left out an insulator on the bottom connectors or brush holders.
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12-09-2013, 04:09 PM | #17 |
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Re: Sparton Horn Overhaul
Hi Charlville,
Newshirt has given you a pretty thorough tear down and rebuild list. You may also want to try the article 'Care & Feeding of the Model A Horn", p.103 of Vol. 1, How to Restore Your Model A, 2nd. edition. |
12-09-2013, 05:14 PM | #18 |
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Re: Sparton Horn Overhaul
Charlville mentioned that the adjusting screw was missing. Are there more than 1 type, & are they easily available?
I've had Vermin for 3 years & keep forgetting to see what brand my horn is?? (DUM-DEE-DUM-DUM!) Bill W.
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12-09-2013, 05:45 PM | #19 |
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Re: Sparton Horn Overhaul
Hi Bill
You make a good point, now I'm looking a bit closer I suspect the motor cover on my horn is a replacement (states Sparton), so I'll investigate the adjusting screw and plate situation, as the plate and it's associated parts are also missing. (as per the picture) |
12-09-2013, 05:49 PM | #20 |
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Re: Sparton Horn Overhaul
Hi Richard
Thanks for the tip on "Care & Feeding of the Model A Horn", p.103 of Vol. 1, How to Restore Your Model A, 2nd. edition". Very handy Regards Kevin |
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