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Tightening Torsion Tube on an H

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Dave in CT

07-02-2005 22:13:26

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How do folks tighten the 6 bolts/nuts on the torsion tube of an H that hold the tractor halfs together? Should I jack up both slides slightly? Is there a torque value to get to or is this another one of those your-torque-wrench-doesn't-go-that-high, as-tight-as-you-can-possibly-get levels of tightness?

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Aces

07-03-2005 07:48:13

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Re: Tightening Torsion Tube on an H in reply to Dave in CT, 07-02-2005 22:13:26

Dave The problem here is the bolt and lock washer if you look at the later tractor like 656 706 806 they have grade 8 bolts and no lock washer. So I would get new g8 bolts no lock and tight then a 1/4 turn yet. When we went to g8 bolts on the H M 300 350 300 450 no washers we stoped the problem.

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Dave in CT

07-03-2005 18:48:10

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Re: Tightening Torsion Tube on an H in reply to Aces, 07-03-2005 07:48:13

Fantastic. Nothing like a permanent solution. 1/4 turn after tight sounds like a lot but I'll give it a try. Any suggestions on where to get g8 bolts that big? I would imagine they cost a bit. I haven't looked closely at all of them but, aren't two studs? Go to g8 on those as well, I would imagine.

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Bob Frey

07-03-2005 05:25:33

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Re: Tightening Torsion Tube on an H in reply to Dave in CT, 07-02-2005 22:13:26

Dave,

I don't think you need to support the tractor but just tighten the bolts good. One old mechanic told me the torque value is "Tight, tight,tight" for those bolts. I know that torque value isn't scientific but it's worked pretty well for me!

Bob

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Hugh MacKay

07-03-2005 03:58:24

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Re: Tightening Torsion Tube on an H in reply to Dave in CT, 07-02-2005 22:13:26

Dave: My dad experienced breaking his H in half at this point back in 1955. The tractor was new in 1951. We hadn't noticed this being loose, however upon inspection after disassembling the tractor, one could clearly see the two castings had been working on each other. Yes, the tractor had a loader on it and had done a lot of loader work. A local welding shop owner at that time suggested it was not the fault of an H not being rugged enough for a loader. He suggested that if all castings on a Farmall H or M were bolted tightly, there was no man alive tough enough to put these tractors through a normal farm work pace, and break castings. His contention, man will break before the tractor.

My suggestion, you tighten these bolt as tight as possible with an 18" to 24" wrench handle.

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Dave in CT

07-03-2005 06:15:28

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Re: Tightening Torsion Tube on an H in reply to Hugh MacKay, 07-03-2005 03:58:24

Thanks Hugh, I remember that story well from one of your earlier posts. I'm doing this both for prep to put on a loader and as a result of some log moving I did with a boom attached to my front snow plow frame (poor man's loader). As a result of the log moving, the bolts have loosened a bit. Would you jack up both halfs a bit or will just tightening the bolts draw them in enough?

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Allan in NE

07-03-2005 08:32:04

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Re: Tightening Torsion Tube on an H in reply to Dave in CT, 07-03-2005 06:15:28

Hi Dave,

Just to add on what Hugh has said, you don't have to jack up the tractor. Just yank 'em up tight as you can. Don't forget the inside bolts too.

If you think about it, that torque tube is actually an open-bottomed box and this is exactly the area where the stress is gonna be placed.

Also, we forget that there are "twisting-type" forces at work on the little guy and this twisting action is gonna show up at the weakest area: the torque tube.

That�s why I just can't emphasise enough, the use of additional truss reinforcements underneath her belly to cancel out this "twisting" force when using a loader. Without �em, it is not a question of �if� it will break, it is just a matter of �when� is it going to happen.

Allan

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Dave in CT

07-03-2005 09:29:24

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Re: Tightening Torsion Tube on an H in reply to Allan in NE, 07-03-2005 08:32:04

Hey Allen. Actually, it was your posting of the picture of the truss rods you put on your H that got my attention on this whole subject. I think that's where I first read Hugh's story. I can find the post in the archives but the picture(s) doesn't(don't) come up. If they are on your computer, would you post them again and I'll download them to mine for keeps. Thanks for the advice and example.

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