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Spring to Air suspension

Posted By bighorn1975 Saturday, November 19, 2011 4:54 AM
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bighorn1975
 Posted Saturday, November 19, 2011 4:54 AM
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I have a truck that has Hendricson walking beam on it and I want to change it it an Air ride. I realize I will need to drill new holes for the Air ride but what to do with the original holes for the hendricson hangers in the frame rails. Can you weld in to fill and grind smooth as if they weren't there? I have always heard to be careful about welding on a frame. Any input would be appreciated. Dan
Aaron
 Posted Saturday, November 19, 2011 5:43 AM
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Plug the hole with  a chunk of cut off cold roll and weld it up on the 1/2 to 3/4 holes, the smaller holes back up the back side with a piece of flat copper and plug weld the hole, gind them clean and your good to go, quite often the pad brackets will have cracked the frame sometimes even with the top holes of the bracket, just drill the end of the cracks grind out the crack and weld it up is all you can do with that, no harm in doing so.

I can't get anymore out of it, I've got both sticks hot clear up to the knobs allready.
www.killcarb.org
wayne graham
 Posted Saturday, November 19, 2011 7:55 AM
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Big-Horn, what Aaron said. Wayne
bighorn1975
 Posted Sunday, November 20, 2011 6:41 AM
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Thanks fellas for the fast replies. I will give it a try when I get to that point. Is the copper intended to take some heat away during the process? Dan
Sunday, November 20, 2011 6:42 AM by bighorn1975
wayne graham
 Posted Sunday, November 20, 2011 6:56 AM
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Dan, The weld will not stick to the copper. It serves as a form for the back side of your weld so you can fill the hole. Sorry, guess we should of explained that. I am old school so I still use a stick on DC. I use a one eigth 7018 rod and a cold roll filler like Aaron said. Freind of mine owns a weld repair shop and they plug weld with a MIG which looks easier as I watched. Eithe way it is easy. Grind it close with a haerd wheel then finish with a flap wheel and you will never know where the holes were. check out the holes in your air-ride before you plug any as you may find existing holes that will match up which makes it a bunch easier to maintain alignment if you get that lucky. Time spent in the mock-up position and a lot of measuring and thinking ahead of time will pay off later. Hope this helps and if you have more questions feel free to ask as a lot of us have done these. Wayne
RedKevin47
 Posted Sunday, November 20, 2011 11:47 AM
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Question for you weld/fab guys. In doing a frame stretch should you always use frame stock? Mild steel is too soft and heavy? I'm stretching about five feet and part of the suspension is mounting to it. This is also a switch to air suspension. Its a project truck, not for hire. The existing frame is about ten inches. I can get exact measurements if that is necessary. I'd prefer to use mild steel but I don't want to regret it later. Thanks for any advice.

My truck: 1973 pumper fire truck w/855 Cummins NTF in FWD/Duplex FF2-038
wayne graham
 Posted Sunday, November 20, 2011 3:26 PM
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Kevin, You need PG ADAMS. They are very reasonable on price for frame material. You should match your extension with the same tensile strength that your existing frame is, If you give them your specs they can tell you what will work and you will be getting info straight from the manufacturer. Wayne
glenn akers
 Posted Sunday, November 20, 2011 4:07 PM
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I was down a Davis bed factory in Little Rock monday and saw them strecking frams. The salesman said all they use is 50000 tensil steel for inter and out fram rail.I was surpriced to find that thats what they use. I have used that for inter frame for years but always used real frame for outside.

glenn akers
wayne graham
 Posted Sunday, November 20, 2011 4:09 PM
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Glenn, I am with you on that. Wayne
RedKevin47
 Posted Sunday, November 20, 2011 6:34 PM
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http://www.pgadams.com/truckframes.php

I looked them up. They certainly have what it takes. I'll probably get a quote and see what the shipping would be. Its likely that I can get the same product closer to Oregon.


My truck: 1973 pumper fire truck w/855 Cummins NTF in FWD/Duplex FF2-038

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