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Farmall & IHC Tractors Discussion Forum
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Need help on 1951 farmall M

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grizz665

06-27-2016 08:26:07




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I have 51 M with numbers grinded off above oil filter with 6722 3 dj stamped in it. also have cover plate below carb were these Ih replacement blocks ? build to 450 spec? Also has fbkm 2600 3 9 x1 stamped on block. Casting number on block is 5 15 W The tag number on tractor is 271039 x1.




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D Slater

06-27-2016 09:07:58




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 Re: Need help on 1951 farmall M in reply to grizz665, 06-27-2016 08:26:07  
271039x1 was built in august of 51 and the engine number would have been 260039X1. Casting number would be 6722DJ. Guessing a problem happened at the factory with a damaged block or they just needed another for some reason and stamped the original type numbers, letters on block. Date code is in line for the tractor. Think that would be a standard M bore, unless enlarged later on. Block may also have a plugged hole for a dipstick tube.

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Grizz665

06-27-2016 10:25:49




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 Re: Need help on 1951 farmall M in reply to D Slater, 06-27-2016 09:07:58  
It has a z casting head witch is 1954 its a 8060 head . All so has firecrater pistons in it don't know what the bore is. Haven't taken the head off. It has 450 like power I have a 450 also to compare it to



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D Slater

06-27-2016 17:35:29




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 Re: Need help on 1951 farmall M in reply to Grizz665, 06-27-2016 10:25:49  
Can't say for sure but don't know of any SM size blocks sold in a may casting of 51. Think over half the M tractors messed with have heads with different dates than original by now. Had a 50 M with a April 54 date code 8060DC head also. Your block could be opened up. If it is fire crater pistons it's probably not stroked.



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