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Farmall & IHC Tractors Discussion Forum
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Re-springing a Spring

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Dave

02-03-2004 05:08:50




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I have a Fast hitch I salvaged off of a Farmall140 that I'm putting on a Super A. The 140 had been burnt in a barn fire. The lift arm helper spring was compressed at the time of the fire and was appearently heated excessively. It has no "Spring" left. I've stretched it back to it's original free length, Is there anyway to reheat it, then cool it (temper) it back to have some spring in it? I figured some of you metal engineers will know. Can't find a replacement any where.

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bill olson

02-03-2004 18:06:38




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 Re: Re-springing a Spring in reply to Dave, 02-03-2004 05:08:50  
I dont know the diameter of the spring wire in question. but springs are not hard to wind and the tempered wire is avaiable at many spring manfactures I have wound springs up to 1/4 wire diameter useing the lathe and a pipe manderal



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Dave

02-04-2004 04:53:21




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 Re: Re: Re-springing a Spring in reply to bill olson, 02-03-2004 18:06:38  
3/8 dia. wire, 2 1/4 O.D., 1 1/2 I.D. 30 in free length, 14.25 solid length. 38 Coils, 36 Active, Closed-ground ends. Approx rate of 100 lbs.....



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bill olson

02-05-2004 14:41:39




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 Re: Re: Re: Re-springing a Spring in reply to Dave, 02-04-2004 04:53:21  
The spring can be made,how much tolerance can you allow on the Id, If we dont have to make up an arbor it would cost approx. 325.00 for 3 units setup is the big cost on these items, thanks bill



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scotty

02-03-2004 06:23:43




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 Re: Re-springing a Spring in reply to Dave, 02-03-2004 05:08:50  
Dave, It sounds like you have returned the spring to its original configuration. By reheating the spring in a heat treating oven to a cherry red color, then quenching the spring in oil. Then you will have to anneal the spring in the heat treating oven to a straw color, remove and allow to air color. Of course this all depends on the type of material that original spring was made of. I am a toolmaker of 32 years and my heat treating backround is limited. I would try and find a reputable spring shop in your area, they may be able to attempt this procedure for you.,

scotty

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Dave

02-03-2004 16:59:50




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 Re: Re: Re-springing a Spring in reply to scotty, 02-03-2004 06:23:43  
Thanks for the info. Trying to figure out a method to heat something that size. I called a truck spring company locally, who said it can't be done. Said they've tried this with coil springs and it didn't work and just made it brittle. I tend to think your right. I'm going to figure out a way.....



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