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Tractor Pulling Discussion Forum

JD B guys

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JDG70

02-23-2005 12:08:29




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How much can you stroke a B and what journal sizes are they using. Never done much work with a B before. I want to build one for the light classes.




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SILVER STREAK

02-26-2005 04:07:19




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 Re: JD B guys in reply to JDG70, 02-23-2005 12:08:29  
I have a late style B stroked to 8".



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BushogPapa

02-24-2005 06:06:28




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 Re: JD B guys in reply to JDG70, 02-23-2005 12:08:29  
What kind of Axles do these guys use in the Stroked "B"..??? We broke 4 just picking corn, over the years..!!! (Mounted picker #226)

I can't imagine putting that much power to those Original Axles..!!! Just think about Pulling a JD "H"..with those spindly Axles, too...!!!! How about the transmission..will it stand up to the stress of a 7" stroke without twisting the shafts..?? My "B" was bored 3/16" in 1960, and I wouldn't want to put a bit more stress on the drivetrain than this one does..!!! It has every bit as much power as my 520..and it sent a "all-fuel 60" down the road because it coudn't do any more work than the "B"..!! So often, those "Late" "B"'s are under-estimated..!!!!

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WTW

02-24-2005 08:55:49




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 Re: JD B guys in reply to BushogPapa, 02-24-2005 06:06:28  
I have been pulling unstyled model "B" John Deere's for twenty years as of this coming Summer. The cubic inch displacement on them have been doubled and the actual Horse-Power in them is over tripled from it's original. I have never broke a stock axle shaft or transmission shaft. The transmission and axle shaft bearings were all replaced and set up when the tractors were built / modified for pulling. I always thought I would twist off a transmission drive shaft at the first reduction but never have and I figure the only reason I have not is the same reason I never broke or twisted off an axle shaft. What you have to realize when pulling, the load is very gradual and steady with no jerking and bouncing for the most part for a short distance. Years ago when axles broke under pickers there were more factors to consider besides there actual weight like cold weather uneven terrain on and off draft loads from the wagon full of corn non stop all day. Sooner or later fatigue will prevail. As a guy told me one day, if you bend a piece of wire long and constantly enough it going to break sooner or later. Over the years all the axle shaft failures I have seen fail on tractors from two cylinder on up a common factor on most of them was the outer axle bearing was in process of failing and many times had spun on the shaft scoring it like a piece of glass and when you add that to all the other factors, you will see them fail. I give the model "B" credit as how tough they were even though they look pretty wimpy compared to a "A" or an "G". Compare that little "B" to an 88 Oliver that was rated about three times the HP of the unstyled "B" and the rear end and axle shafts in them don't look any heavier or maybe even lighter in allot of ways. That's probably why they pull so many of them against "B's". I have seen a few Oliver's break axle shafts and bull gears in them though. Never Know Maybe I will break one some day too. DW

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jd b puller

02-23-2005 16:45:34




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 Re: JD B guys in reply to JDG70, 02-23-2005 12:08:29  
There are a lot of good, strong B's running 7" or so. Farmall H/300 rods give a journal of 2.25 or 2.3 (H vs 300). Some people have gone bigger, but everyone probably knows SOMEBODY who broke a crank...

Do you think anyone would care if you just widened the frame rails and put a G block in it?



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JDG70

02-25-2005 12:16:11




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 Re: JD B guys in reply to jd b puller, 02-23-2005 16:45:34  
Probably would depend on where you were at. Do you think a G block would fit in there with some grinding. I know a guy who put a 70 power block in an unstyled A similiar to how the G guys put a Jerry's block in. Grind, Grind, Grind and when you think you have it Grinder her some more.



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