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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Sleves and pistons 770

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Joel H

01-16-2005 15:39:36




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I am over hauling my 770,it has M&W sleves and pistons in it.The pistons are turbo-dome with offset pins. Are these still available or is there newer technology that is better. This tractor doesn't do much field work any more. Mostly used to haul loads, mow hay, bale hay, yard work and as a 2ond loader tractor, so would there be any advantage to going back to standard sleves&pistons. Thanks for any help.

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Doug S

01-17-2005 08:07:11




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 Re: Sleves and pistons 770 in reply to Joel H, 01-16-2005 15:39:36  
I am an M&W sleeve and piston dealer, and the Turbo dome set for your application has been discontinued. Repalcement sets with 3-3/4 flat tops are available from a couple aftermarket companies. FYI, M&W piston and sleeves are owned my Herschel-Adams, who also ownes Valu Bilt tractor(formerly Central Tractor). HA and Value Built do have web sites.



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770

01-16-2005 17:53:27




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 Re: Sleves and pistons 770 in reply to Joel H, 01-16-2005 15:39:36  
I have one tractor with the M&W domes (half-donuts) and another with the flat tops. booth 3-3/4. Frankly, I don"t see that much of a difference. The tractor with the flats has the head shaved considerably more but they both run good. I pull both. The Tractor with the domes dynos at 2 horse more??? I"d say use what you could get cheaper??? I know Korves sells kits....Just my opinion.



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WFE

01-16-2005 17:02:55




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 Re: Sleves and pistons 770 in reply to Joel H, 01-16-2005 15:39:36  
I agree with John. Wouldn't go back to standard because for the same money you can have an overbore with flat top pistons. The overbore will increase your compression ratio, and if you want to achieve the same effect of the dome pistons, you can shave the head down 30 to 40 thousandths. There are 3 3/4" overbore kits available that should give you around 248 cubic inches.



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J. Schwiebert

01-16-2005 16:42:45




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 Re: Sleves and pistons 770 in reply to Joel H, 01-16-2005 15:39:36  
Howw about going with the 3-5/8. We did that on Super 77 models in the 60's. Always got along fine. I was never a big M & W fan. What is the bore on those? Last set I worked on was a 3-9/16 set.



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