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Massey Harris & Massey Ferguson Tractors Discussion Forum
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4 === 4.25 Bore in a 44

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MH49

12-09-2004 08:57:19




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Has anybody been able to bore a 4" sleeve in a H260 block out to 4.25? What about an 4.0625 M&W sleeve? I am in need of some displacement and have a line on some 4.25 pistons.

Thanks...




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M-h44puller

12-14-2004 14:33:41




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 Re: 4 === 4.25 Bore in a 44 in reply to MH49, 12-09-2004 08:57:19  
the piston size of 4.250. I have used the sleeves from a A.C.426 engine. Same bore and stoke, you will have to bore the block and put reliefes on the bottom of the sleeves.Could use J.D. 4020 piston you will need to mill the top of piston,about .250. pin bushing are some what close. any ? call 515 332 5187 jerry



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jd2830

12-12-2004 11:19:33




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 Re: 4 === 4.25 Bore in a 44 in reply to MH49, 12-09-2004 08:57:19  
you have to install larger sleves in the block wall thickness cant go below .150 thousandths. I am putting these in a h260 block now



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MH49

12-12-2004 13:02:14




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 Re: 4 to 4.25 Bore in a 44 in reply to jd2830, 12-12-2004 11:19:33  
I wasn't sure how much meat was available in either the 4" or the M&W sleeve. Did you have to go to custom sleeves or was there something off-the-shelf that would work?

Thanks...



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jd2830

12-13-2004 04:45:08




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 Re: 4 to 4.25 Bore in a 44 in reply to MH49, 12-12-2004 13:02:14  
HAD TO GO TO CUSTOM SLEEVES



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Ohioplowboy

12-11-2004 08:06:24




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 Re: 4 === 4.25 Bore in a 44 in reply to MH49, 12-09-2004 08:57:19  
If you think you can bore a sleeve out a quarter of an inch, or even half that much, you need to talk to a machine shop. Just be prepared to wait for the machinist to stop rolling on the floor with laughter, before he tells you why he wouldn't do that, even if his name was Tim "Tooltime" Taylor. Seriously, though, think about the sleeve's ability to withstand the extreme pressures and temperatures of about 1,000 explosions per minute after you've reduced the wall thickness to half. You want a bigger enginen not thinner sleeve walls.

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