Yanmar 1500 pistons: Yanmar Tractors  -- Other Tractor Brands Discussion Forum and Review Yanmar 1500 pistons: Yanmar Tractors -- Other Tractor Brands Discussion Forum

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 03-02-2007, 02:33 Post: 140134
funkster



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 Yanmar 1500 pistons

I am installing new YM 1500 pistons. I have been told that pistons generally have a marking that indicates a direction like forward. The only marking on the pistons is a TR stamped towards one edge of the top surface. This particular marking would not indicate the front but possibly one side due to its orientation with the wrist pin. Does anyone have any insight to this question for these pistons. There are no other markings that I can see.






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 03-02-2007, 02:58 Post: 140135
harvey



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 Yanmar 1500 pistons

Typically a casting mark, line or something on the inside.

Are there valve indentations?






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 03-02-2007, 10:37 Post: 140141
funkster



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 Yanmar 1500 pistons

Nope, no valve indentations. To my eye it appears symmetric. I don't see anything on the original pistons either, but they are in pretty rough shape so its hard to tell. I'll inspect the inside again but pretty sure there's nothing there.






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 04-05-2007, 22:01 Post: 141070
cpdtwo



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 Yanmar 1500 pistons

REPLACED MINE NOT LONGAGO AND HAD NO OTHER MARKING JUST REPLACE THE FACING THE SAME WAY WITH THE TR EITHER FACING TO THE RIGHT OR LEFT SIDE AS THEY CAME OUT






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Discussion Boards > Active Subjects > Messages as Posted > Yanmar Tractors Forum

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