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Trying to rebuild original air horns

 
Old 10-20-2018, 11:31 PM
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Default Trying to rebuild original air horns

1978 Ford F-250 that has had mechanical air horns since it was new. There is Zebart over the mounting bracket. The valve assembly has bad foam gaskets. Any info about this horn would be very appreciated.
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Old 10-24-2018, 12:43 AM
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May want to post this in another area of the forum to get more attention. This is mostly people posting their builds.
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Old 10-24-2018, 10:34 AM
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moved to the Classics Corner
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Old 10-24-2018, 09:36 PM
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Old 10-26-2018, 10:26 PM
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Default That's it!

Originally Posted by Steve83 View Post
Thank You Steve83. This is the setup I have. All the links to information are great. The horns I have are different though. Big "FORD" in the back of the trumpet. Now that I have the numbers I can try to find parts to rebuild the vacuum compressor unit. Can wait to give the truck a voice!
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Old 10-28-2018, 12:35 PM
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You'd be much better-off just using a modern 12V electric air compressor pump with a pressure-limiting switch.
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Old 10-28-2018, 02:06 PM
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Yes, that's an good option. The truck is "stock to the bone" and if I can't make the old one work I'll be looking for the 12v pump. The truck has a cool story history and I would like to keep as much of the original equipment the truck left the dealership with as I can.
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Old 10-28-2018, 10:57 PM
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It won't be worth a penny more to you or anyone else with all its old, original, unreliable parts. The lower-maintenance you make it, the more you'll enjoy it. And modern parts are better. Ford only used that vacuum system because at that time, 12V air pumps were expensive, rare, & unreliable. That has changed, so there's no reason to keep the vacuum system (which is now expensive, rare, & unreliable).

BTW
Undercoating (Ziebart) can usually be removed by soaking in mineral spirits, kerosene, VarSol, Crystal Kleen, or (at worst) gasoline. Carb or brake cleaner may also remove it. If none of those works, try original Goof Off (not the newer water-based version) in a well-ventilated area, using solvent-resistant gloves.

Last edited by Steve83; 10-28-2018 at 11:00 PM.
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