| willys36 | -- 08-06-2014 @ 11:15 AM |
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I'm a novice to vintage Ford technology so bear with me. I have a project that requires 1940 Ford wheel cylinders that I want to adapt 4AN braided stainless hoses to. Does anyone know what type of adapter I need? It looks like the threaded hole in the cylinders is 7/16" straight threads so doesn't seal with tapered pipe thread or inverted flare. I am guessing it uses copper gaskets? Would be grateful for suggestions on what adaptor I need to buy.
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| rotorwrench | -- 08-06-2014 @ 4:41 PM |
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The wheel cylinders of most of the old Ford cars were a straight thread for the hose assembly to attach with the copper washer. AN fittings used in aircraft use mostly straight threads with a 37 degree flare or they use national pipe thread. No matter what you end up with, it will require some form of modification/alteration. An AN815-4 union fitting has 7/16-20 threads with a flare on both ends. I have no idea if it will work to machine the flare portion off one end and leave the threaded porion to attach to the wheel cylinder. It depends on whether the treads are a match. If I was to try this, I would get steel or corrosion resistan steel since the aluminum fittings are a lighter duty but a person could experiment with an aluminum fitting to see if it will fit with the copper washer. This would leave an AN 4 fitting on the other end that a -4 braided steel hose could be attached to. Your solid lines would also have to be flared to 37 degree specs in order to use the flared fittings on them. The -4 stuff is kind of big and will have more fluid than the average stock system but you may be limited by hose size too. In aviation we use several different types of braided steel line either from Aeroquip or Stratoflex. The fittings and the hose aren't cheep. 605 or 701 hose should work since it can work with about anything you can throw at it chemically for 10-years or so. The teflon hose will last a lot longer but can be sensitive to flexing over time and can not be bent on as tight a radius as the synthetic rubber lined braided steel hose can. It's up to you if you want to go this route. I could never recommend that someone modify or alter a brake system due to liability concerns but I can tell you that the brake systems on airplanes are made with Cres or 5052-O aluminum tubing, AN fittings, and steel braid reinforced flexible hose assemblies.
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| TomO | -- 08-07-2014 @ 7:22 AM |
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You can buy braided hoses from several suppliers to the Hot Rod hobby. Try Inline Tube. Tom
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