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Allis Chalmers Discussion Forum

WD-45 Crank...Strange Sizes!

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A. Berenz

05-31-2008 15:08:37

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I am in process of rebuilding my second WD-45 and have come across a strange thing. When mic'n the crank to determine bearing sizes I got a std. size on the rods of exactly 2.375" but the crank (front thrust) measured #1:2.436", #2:2.4775", #3:2.4775". The std. size for crank is 2.4375". Why in the heck do #2 and #3 mic bigger than std? This was a replacement crank I got with the deal when I bought the tractor, as the original was broken. Is the crank from some other engine or what? I did re-mic 3X and even checked cal on mic. Did allis make two different size main journals? PLEASE help! Thanks all

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A. Berenz

05-31-2008 16:05:25

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 Re: WD-45 Crank...Strange Sizes! in reply to A. Berenz, 05-31-2008 15:08:37  
OK, so just to make sure, if I order the std., "front thrust" main bearing kit, listing std. journal size @ 2.437" I should get the #2 and #3 bearings sized @ 2.477" with the smaller #1 bearing right? Just want to make sure since the parts sites only, apparently, list the #1 bearing size...

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Jerry Coulter

05-31-2008 15:27:52

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 Re: WD-45 Crank...Strange Sizes! in reply to A. Berenz, 05-31-2008 15:08:37  
According to the AC service manual, front main journal diameter is 2.435 to 2.4365" while center and rear are 2.477 to 2.478"

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A. Berenz

05-31-2008 16:10:40

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 Re: WD-45 Crank...Strange Sizes! in reply to Jerry Coulter, 05-31-2008 15:27:52  
Thanks for the help! I have the manuals but can't find them! Wife must have put them up somewhere. She's at work and I was wanting to get the bearings on order tonight while I had time... :-) The good news is that it looks like I have a close to perfect Std. R/M crank!

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