Mw pistons

tjiniowa · Jul 20, 2011

I pulled apart my John Deere 50, it has M&W add power pistons, part number AP132, does anyone know if this is standard size or overbore by the part number, nowhere on the piston does it say .045 or .090, which are the common oversize. I need different pistons because this tractor sat for years with antifreeze in th chamber and eroded the pistons pretty bad, the cylinders clean up good with some muratic acid and honing.

teddy52food · Jul 20, 2011

Get someone with their mikes to measure them.

Pat-CT · Jul 21, 2011

Only way is to really measure them. Get a good caliper and measure them up. Its possible that they are stock bore with just domed pistons though.

gene bender · Jul 21, 2011

What do they measure that would let you know real quick what their size is.

jd b puller · Jul 21, 2011

Doesn't really matter what pistons you have, measure the bore, and get the appropriate sized pistons. You may have to bore it to get to an acceptable size.

BushogPapa · Jul 21, 2011

Your bores may be Standard or, (as was common to add Power) bored to as large as +.125" .

Ron..

heavyhaulertoo · Jul 21, 2011

Don't they put the that on the inside next to rist pin.

Mw pistons

tjiniowa

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teddy52food

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Pat-CT

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gene bender

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jd b puller

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BushogPapa

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heavyhaulertoo

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