I'm not a puller....But???
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Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=115124
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Topic: I'm not a puller....But???
Posted By: den/southern illinoi
Subject: I'm not a puller....But???
Date Posted: 23 Nov 2015 at 4:59pm
I'm not a tractor puller nor plan on being one but I was disassembling a Series 3 D 17 rear end today, taking off the final drives and wondering...as easy as the final drives could be rolled back on it (only thing to change would be fender mounts) would there be any advantage to doing so. It would move the wheels back further and this would lengthen out the tractor.
Maybe just a stupid idea and bound to be a reason not to do it....but had to ask. Den
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Own 4 wheel 20, 2-5015, 5020 and associated equipment and 2 electric forklifts.
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Replies:
Posted By: cwhit
Date Posted: 23 Nov 2015 at 5:14pm
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Yes, Den, there are rules against doing that. It makes it look kind of neat tho.
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Posted By: tbran
Date Posted: 23 Nov 2015 at 6:06pm
Many years ago the "Country Dude" 180 , Dennis Brabec, perpetual 5000# NTPA winner did this, was probably the first, and many super stocks rolled them back. This resulted in longer wheel base and yes it helped. We built a couple of WD's with 38" rubber many moons ago like this. It took about 2 years before the competition noticed and objected. I saw no difference between this and some of the engine mods others were doing and swapping, but then everyone is always after the ones on top...
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When told "it's not the money,it's the principle", remember, it's always the money..
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Posted By: DrAllis
Date Posted: 23 Nov 2015 at 7:00pm
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It essentially moved the whole tractor forward (except for the final drives) 6 inches or so, making the front end heavier. Some extra overall weight was gained in changing the drawbar bail to still meet the 20 inch high by 18 inches short rule, but the axle change more than offset the drawbar weight gain. The tractor also handled better with a lower center of gravity. You'll find that as HP is increased, it seems to take more and more weight on the nose to keep her down where it belongs. Back in the Brabec Bros day, their top HP wasn't ever over 1200. The weight class evolved too, going from 5000 to 5200 and finally to 5500 pounds. It seemed every so many years more and more safety equipment was required and hence the weight allowance kept creeping upwards.
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Posted By: TeamAllis
Date Posted: 23 Nov 2015 at 7:30pm
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Rolling the axle back lines the center of the Bull gear (dropped portion) 8". Been there and done that, we were protested and rolled ours back into the stock position. With the axle rolled back we ran 150 lbs. on the front, 500 lbs. on the rear rack and 250 lbs. on a center rack. Power track, the front end comes up for the first 75' and out the end she goes. Tractor runs between 22 & 25 mph that is fast when you are 69 years old, but it is fun.
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Posted By: PaulB
Date Posted: 26 Nov 2015 at 10:15am
Look at the difference in a CA D10/12 final drive compared to a B/C final. The reason for the pulling rule against it was the AC would whip up on almost anything else in the lightweight classes of the time. The late 60's and 70's was the fun time to be pulling.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Posted By: Ken in Texas
Date Posted: 30 Nov 2015 at 5:25pm
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Pulled a friends stock IB just once for fun. With the bull gear housings rolled forward and the shorter torque tube the balance was a great improvement over a stock farm B. Totally surprised the heck out of me how well a IB gets power to the track. Had the wrap around frame too.
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