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Minneapolis Moline Tractors Discussion Forum
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MM Z Piston

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Larry O.

10-11-2004 16:11:49




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I tore down a Z. It has aluminum pistons they are stamped STD on top = standard On the inside they say Add Power...no numbers.
they measure 3 11/16. Anybody know what they are and where I coulg get 1. Thanks




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Tim Wilson

10-12-2004 07:59:42




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 Re: MM Z Piston in reply to Larry O., 10-11-2004 16:11:49  
Add Power was a brand name of M&W's pistons. We have a vintage set in our 1951 ZA. They were in it when we bought it years ago. They are also higher than stock compression. My brother has an old M&W catalog with specs, I can get the info if you would like.

Tim



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Kevin Moschenrose

10-11-2004 22:50:06




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 Re: MM Z Piston in reply to Larry O., 10-11-2004 16:11:49  
It could also be that some one put a Big Power set in it that was offered by MM. That set number for all four pistons is 10p2958.



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Kelvin

10-11-2004 17:53:46




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 Re: MM Z Piston in reply to Larry O., 10-11-2004 16:11:49  
3-11/16 = 3.6875

Standard Z bore 3.625

3-6875 minus 3.625 = .0625

Your piston is very close to a .060 oversize piston, which is still available (in aluminum) from AGCO and some of the MM parts suppliers. (At $125 or maybe more) You did mike it, didn't you? If you don't have a mike, find someone who has a dial caliper or a vernier caliper and get them to measure your piston at the bottom of the skirt and 90 degrees from the pin hole.

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Larry O.

10-14-2004 09:16:25




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 Re: MM Z Piston in reply to Kelvin, 10-11-2004 17:53:46  
Your right it's 60ths over. Sorry I didn't get back sooner been real busy. So now anybody have a good used aluminum piston they want to part with. Thanks
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