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ac55tractor 
Silver Level
Joined: 20 Oct 2012
Location: Raymond, Maine
Points: 240
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 Topic: Allis B torque tube cast steel or cast iron
Posted: 26 Nov 2020 at 11:04am |
Hi and Happy Holidays. I have a 1955 Allis B. Where the starter motor bolt is on the torque tube, I noticed years ago that there was a horizontal hairline crack from being over tightened. I drilled a small hole at the end of the crack so the crack will not travel any further.
I also have a mold plow for the tractor that was in two pieces when I got the tractor in 1993. It was broken just above the blade and below the arch on the long arm. I beveled the arm and welded the mold plow arm back together with my MiG welder with flux core wire. It was made from cast steel. If it was cast iron the weld would not have worked.
My question is, the torque tube also made from cast steel or is it made from high quality cast iron? I would like to bevel out the crack and MIG weld it shut. I don't dare not knowing what it's made out of.
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Dick L
Orange Level
Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5093
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Posted: 26 Nov 2020 at 7:54pm |
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Cast iron. Not sure how high of quality the cast iron is. It is high enough for the application.
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steve(ill)
Orange Level Access
Joined: 11 Sep 2009
Location: illinois
Points: 90947
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Posted: 26 Nov 2020 at 8:24pm |
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the engine block, trans case and rear axle case are all cast iron.. You would think without a frame, the torque tube would have been better to be cast steel........ but i guess the number of them that are broke is very minimal, and probably broke from abuse.
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Like them all, but love the "B"s.
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ac55tractor
Silver Level
Joined: 20 Oct 2012
Location: Raymond, Maine
Points: 240
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Posted: 26 Nov 2020 at 8:30pm |
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Thanks Guys. It's so hard to tell the difference. I know when it came to the mold plow, i took a chance and lucked out.
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Lonn
Orange Level
Joined: 16 Sep 2009
Location: Назарово,Russia
Points: 29819
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Posted: 26 Nov 2020 at 8:42pm |
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There are several videos showing how to tell the difference and how to weld cast iron without preheating.
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IBWD MIke
Orange Level
Joined: 08 Apr 2012
Location: Newton Ia.
Points: 4285
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Posted: 27 Nov 2020 at 6:27am |
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An easy way to check if iron or steel is with a small drill bit. Long stringy chips, steel. Small, crumbly chips, iron.
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ac55tractor
Silver Level
Joined: 20 Oct 2012
Location: Raymond, Maine
Points: 240
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Posted: 27 Nov 2020 at 6:54am |
Thanks, I just remembered that there is an easy way to tell. If you take a hand grinder to it, and the are sparks bright yellow and shoot off like a sparkler on the 4th, it is cast steel. If the sparks are dull, and reddish, it's cast iron. I'm getting a bit older now, and should have remembered these things. 
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 55316
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Posted: 27 Nov 2020 at 8:00am |
 ac55tractor wrote:
Hi and Happy Holidays. I have a 1955 Allis B. Where the starter motor bolt is on the torque tube, I noticed years ago that there was a horizontal hairline crack from being over tightened. I drilled a small hole at the end of the crack so the crack will not travel any further.
I also have a mold plow for the tractor that was in two pieces when I got the tractor in 1993. It was broken just above the blade and below the arch on the long arm. I beveled the arm and welded the mold plow arm back together with my MiG welder with flux core wire. It was made from cast steel. If it was cast iron the weld would not have worked.
My question is, the torque tube also made from cast steel or is it made from high quality cast iron? I would like to bevel out the crack and MIG weld it shut. I don't dare not knowing what it's made out of.
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ac55tractor
Silver Level
Joined: 20 Oct 2012
Location: Raymond, Maine
Points: 240
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Posted: 27 Nov 2020 at 8:25am |
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I am a retired Machinist with over 45 years in the trade. I have done what some people call "Dutch Pinning" But that video takes Dutch pinning to another level. That is such a great idea.
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Nathan (SD)
Orange Level
Joined: 11 Sep 2009
Location: Day County SD
Points: 1304
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Posted: 27 Nov 2020 at 9:53pm |
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Nickel welding rod. Gotta be pretty crappy cast before nickel won't hold.
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