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Tractor Pulling Discussion Forum

47 A JD

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Author  [Modern View]

07-25-2014 20:55:28

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Slant dash A coming up for sale, guy says it is a 1947. How hard is it to get these to 4500, and would it be competitive at 4500 & 5000 in a 2 1/2 MPH class?

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jd50 puller

08-05-2014 04:31:55

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
We have a 47 slant dash. Great tractor. We found a bare back that just has the PTO no hydraulics and even with the factory style fenders I can make 4500. Its pretty much stock its bored .090 over with a custom ground cam. Runs good. Even with the rock shaft housing it made 4500 but no fenders. Can run 2nd gear no problem and will spin out most of the time depending on the track.

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07-28-2014 21:42:21

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
I have a A 6.125 X 8.75 puts out 77hp,,,with a power block from a 60,,,,to much compresion..for sale 5000 734 429 2043

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Kelly N

07-26-2014 11:16:54

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
I bought a 1945 "A" about 5 years ago that was set up for pulling with stamped wheels and 15.5 tires. It would not spin out in the 4500# class. Those old "all fuel" tractors had just alittle over 4 to 1 compression. I proceeded to remove the lift and PTO and put a flat plate on the back, removed the oil bath air cleaner, bored it out 125/000 and put high compression pistons in it and bought a 2000.00 head and after much tweaking, I finally got it to pull up into the 5500# class (but not well) I am saying that I spent over 5000 dollars on it and it was fun then. If you want to pull and not spend your life savings, get an H Farmall or a Oliver 77 which will lighten down to the 3500 or 4000 classes and go have fun ALOT CHEEPER.

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07-27-2014 16:21:11

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 Re: 47 A JD in reply to Kelly N, 07-26-2014 11:16:54  
I've been having a lot of fun with my '39 JD D. I haven't spent much money on it but I do spend a lot of time working on it. It wins around here in CO. At the Victor CO pull I pulled 6 times (3 times in percentage classes and 3 times in distance classes) and won 6 first places. I can get my weight down to 4920 so with the stock 501 cubic inch engine I've gotten it to make enough power to win.

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07-27-2014 16:28:25

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 Re: 47 A JD in reply to banjoblast, 07-27-2014 16:21:11  
Here's a video of my JD D pulling in Victor a year ago.

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07-27-2014 06:59:59

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 Re: 47 A JD in reply to Kelly N, 07-26-2014 11:16:54  
That's what I was thinking. What got me interested was that it has an after market water pump on it. These we usually put on when power blocks were put in. It does not have a power block but I thought maybe it was bored out with aluminum pistons and that is why it has the water pump. And maybe at one time it had a mounted picker and needed the extra cooling. With these old tractors you never know.

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wild willy

07-26-2014 07:10:19

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
A stock A won't even pull either Clay Drenths or Mark Shellums Hotfoot sleds in those classes without a stroked crank or creeper low and creepers never place anymore.

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Joe Carr..,,

07-27-2014 13:56:44

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 Re: 47 A JD in reply to wild willy, 07-26-2014 07:10:19  
Wild Willy makes a good point,A stock hi-lo john deere A or even a stone stock farmall M (they have a fast 1st. gear also)will not do well at all even at 4500lbs pulling those big sleds.

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Early B

07-26-2014 06:58:09

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
4500# should be no problem with tin wheels. I think the faster first gear is better for the lighter class's, the low first in the late A's is to slow for 3-3.5 mph. We pull a 51 A with 13.6's in 2nd gear in 4500#-6000# & its very competitive.

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4010 puller

07-26-2014 05:00:28

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
I think it would be competitive and easy to get into those classes. I have a buddy that had a 42 and It went into 4500 and 5500 all day long. One thing about it it has the fast transmission. I think 1st gear Is 3.5 mph, where the 49-52 were 2.5 mph in 1st gear. You may find a 48-52 b being a better option if your speed limit is only going to be 2.5mph

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07-26-2014 03:45:14

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 Re: 47 A JD in reply to WFE270NWIA, 07-25-2014 20:55:28  
I sold my 46 slant dash to a kid, he was telling me it weighed 4100 lbs with him on it. Tractor is on 9 bolts with the rock shaft.

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07-27-2014 15:29:35

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 Re: 47 A JD in reply to MikeJM, 07-26-2014 03:45:14  
i have a 51 A we pull in 6000 class and pull big sleds with no problem. it does not have a stroked crank but does have a power block and heisler head. Took first last two weekends at local fairs.

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