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Allis Chalmers Discussion Forum

Another WD torque tube question

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03-02-2004 17:20:55

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Does anyone know why the two outside (right and left) studs on the bottom of the torque tube that hold the PTO on are fine threads and the other 4 are course? I have 3 torque tubes from different WDs and they are all like this.

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Brian G. NY

03-03-2004 17:37:35

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 Re: Another WD torque tube question in reply to wdTom, 03-02-2004 17:20:55  
Wow, I changed a couple of PTO housings and I don't remember that. I looked in the parts manual and all six have the same part number.

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03-03-2004 18:36:14

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 Re: Re: Another WD torque tube question in reply to Brian G. NY, 03-03-2004 17:37:35  
Interesting, thanks for getting back to me. No big deal, just one of those things you run into and say "I wonder why?"

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03-03-2004 20:03:53

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 Re: Re: Re: Another WD torque tube question in reply to wdTom, 03-03-2004 18:36:14  
I just pulled one apart last week and found the same thing. Side bolts were fine thread, with longer nuts. Other four were coarse thread. Noticed the engineers could have used a bit more cast to give adequate clearance too. No reason not to. Unnecessarily difficult to remove. Could the fine thread bolts be used for easier assembly, or used to pull the box up into position? Those nuts might thread on easier, and with more thread contact, could pull the box up without stripping?

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Brian G. NY

03-05-2004 06:31:54

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 Re: Re: Re: Re: Another WD torque tube question in reply to JMS/MN, 03-03-2004 20:03:53  
Well, ya made me do it, I went out and checked and you're both right. I guess my rememberer ain't workin' as good as it used to. I agree with JMS; it's not like you can just put that casting up there and screw on the nuts. You gotta "work it up a couple of threads at a time. I wonder if those extra thick nuts are really necessary?

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