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57WD45FarmUse 
Silver Level
Joined: 01 May 2019
Location: NE Kansas
Points: 88
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 Topic: Ideas why one piston looks dished?
Posted: 02 May 2019 at 9:28pm |
Hi there. I pulled the head off my block and and took a close look at my piston tops and the rear one is dished in whereas the other ain’t. Any ideas what can cause this? Or possibly it is an incorrect replacement? thanks in advance! 
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TramwayGuy
Orange Level Access
Joined: 19 Jan 2010
Location: Northern NY
Points: 11445
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Posted: 02 May 2019 at 10:51pm |
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Probably the same reason my Oliver 88 had 5 aluminum and 1 cast iron piston when I bought it! 😆
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57WD45FarmUse
Silver Level
Joined: 01 May 2019
Location: NE Kansas
Points: 88
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Posted: 02 May 2019 at 11:21pm |
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Yup. That’s what I’m thinkin. I reckon I’m just Gona keep runnin with the bottom end as is for now.
Some years later I’ll get her some new pistons, rods ,full rotating assem!
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DonDittmar
Orange Level
Joined: 15 Sep 2009
Location: MIllersburg, MI
Points: 2484
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Posted: 03 May 2019 at 7:50am |
 TramwayGuy wrote:
Probably the same reason my Oliver 88 had 5 aluminum and 1 cast iron piston when I bought it! 😆 |
LOL. I did a 460 gas IH for a guy once, he swore up and down it was original and has never been apart. When I popped the pistons out, all 6 were knurled. Thats an old time repair you dont see anymore.......
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Experience is a fancy name for past mistakes. "Great moments are born from great opportunity"
1968 D15D,1962 D19D
Also 1965 Cub Loboy and 1958 JD 720 Diesel Pony Start
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57WD45FarmUse
Silver Level
Joined: 01 May 2019
Location: NE Kansas
Points: 88
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Posted: 03 May 2019 at 6:13pm |
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Knurled. Now there’s a word I’ve heard. Just wasn’t sure the meanin in reference to piston work until now !
I was just makin sure I wasn’t missing nothin and I had big problems with my bottom end that damaged that piston..
My gut reaction was it was just a different piston someone put in there because that’s all they could get some where along the line. Thanks!
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Don(MO)
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Joined: 12 Sep 2009
Location: Bates City MO.
Points: 6862
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Posted: 03 May 2019 at 6:32pm |
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Can you post a pic of the three other pistons and what's the bore of all four pistons?
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3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep.
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DMiller
Orange Level Access
Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 31059
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Posted: 03 May 2019 at 6:35pm |
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Have not seen a knurled piston in forty years, used to know a gent with tooling to do that as well knurl guides, they don't do that anymore either.
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