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John Deere Tractors Discussion Forum
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Re: JD-H Piston install question

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Mike M

03-05-2014 11:13:58

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The back of the piston skirt is to have a marking "TOP" stamped into them. This is to face up to the top of the block when connecting to the rods. Your rods should ? be marked #1 & #2 and these also are to face to the top. #1 is to be flywheel side.

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03-05-2014 13:12:39

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 Re: JD-H Piston install question in reply to Mike M, 03-05-2014 11:13:58  
Hey Mike M, I gave a careful look at both pistons skirt, Im not seeing any "TOP" marking or stamp, just the part No. "H212R" on both. The rods are marked as follows H800R, CIRCLE "L" No.1 w/21 & No.2 w/11. numerically that would be backward but I did mark them as they came out. Im assuming the holes half way around the piston under the oil ring will go down like the No.1 was originally. The part No. match stock in the book so I wonder why mine don't show "TOP"

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03-06-2014 07:02:48

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 Re: JD-H Piston install question in reply to Neils, 03-05-2014 13:12:39  
Ok, hard to see there, good information. Thank you

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Mike M

03-06-2014 07:22:30

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 Re: JD-H Piston install question in reply to Neils, 03-06-2014 07:02:48  
So did you find them there ?

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Mike M

03-06-2014 05:22:58

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 Re: JD-H Piston install question in reply to Neils, 03-05-2014 13:12:39  
Look at the flat machined surface clear at the bottom lip like what it sets on if you stand them up on your workbench. It will be at 90* to the way the piston pin goes thru.

IIRC the H212R are the standard size and these are marked on the bottom. Now if they were oversized pistons then Deere usually marked info on them on the top of the piston head.

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