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Tractor Talk Discussion Forum

JDApowerblockheisler

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7800 puller

07-04-2005 16:55:23




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I got his A today. they say it has a powerblock & heisler head. How can I tell? Is there any special markings? About how many horse on average would this put out with both of these? Thanks




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PJBROWN

07-05-2005 04:53:53




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 Re: JDApowerblockheisler in reply to 7800 puller, 07-04-2005 16:55:23  
What's a power block??? Is it for pulling??? Or could you use it for every day work ??? Thanks



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Leroy

07-05-2005 05:04:21




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 Re: JDApowerblockheisler in reply to PJBROWN, 07-05-2005 04:53:53  
It is from Tractor Supply and was made to give more HP for field work and was made for 41 & up A & B, Styled G, 50, 60, 70 and was the equvilant for John Deere what the M & W kits were to I H C. They were a larger bore and also a slightly higher compression but not so much that you could not burn regular gasoline, compression was still less than an auto at that time



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Leroy

07-05-2005 05:22:39




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 Re: JDApowerblockheisler in reply to Leroy, 07-05-2005 05:04:21  
Just found my book. The block for the A increased the bore from 5 1/2" and displacement from 321" to 6" & 381" and increased power from 10-18 HP with a 6.5 to 1 ratio. The B went from either 4 1/2" or 4 11/16" to 5" and disp from either 170" or 190" to 216" with 6.7 to 1 and from 8-12 HP increase. The G from 6 1/8" to 6 1/2" and 413" to 464 " and 6.4 to 1 or LP to 7.7 to 1 and from 14 to 23 HP. 50 same as B and 60 same as A. The 70 went from 5 7/8" to 6 1/2" and 380" to 464" with 6.5 to 1 or LP 8.1 to 1 with 12 to 20 HP, LP blocks for A, B, 50 & 60 to 8.0 to 1. The block for the B cost $ 109.50, the A $ 152.00, G $ 214.50, 70 $ 214.50. Hope this is of interest to all.

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730-Lp

07-04-2005 18:35:28




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 Re: JDApowerblockheisler in reply to 7800 puller, 07-04-2005 16:55:23  
The power block should say power block on the top but could have been ground off. If it is a power block it want have any cockpet's or plugs in the under side of the block .I don't know about the head unless you remove the valve cover and get a casting #.It should make 55 to 60 horse



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7800puller

07-05-2005 13:34:33




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 Re: JDApowerblockheisler in reply to 730-Lp, 07-04-2005 18:35:28  
How much are they worth? I paid 350 for the tractor. The only thing its stuck, heads off, deisel, hammer, no luck, any ideas? Thanks



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7800puller

07-05-2005 13:32:37




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 Re: JDApowerblockheisler in reply to 730-Lp, 07-04-2005 18:35:28  
They say this block is worth alot? is this true? I paid 350 for the whole A. Thanks



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