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Re: need con rod/870

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Adirondack case guy

01-07-2013 16:23:56

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There are two distinctly diff, cranks for 336 engines. Hope your buddy has the wright one comming. More info needed.(to my knowledge 870s had the large journal cranks), BUT!!!!!

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01-07-2013 16:44:40

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 Re: need con rod/870 in reply to Adirondack case guy, 01-07-2013 16:23:56  
I think all 870's had the large, but after all these years you never know what one might find. I did not know they made a small journal 336 until I overhauled a W14 payloader. Rod.

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Adirondack case guy

01-07-2013 17:16:22

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 Re: need con rod/870 in reply to 1370rod, 01-07-2013 16:44:40  
Rod, I bought and installed several 336T industrial units in 7 and 870 tractors. Case Co.people linked me up with Sandhill Equip. in Bassett NE and I was able to get skid units less sheet metal, drive systems and acessories. All small journal turboed 336s. Bolted them into 7/870 gas chasis and had 100 plus PTO hp tractor.
We also ordered in all the top end parts off these engines and woke up a lot of older 7 and 870s

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01-08-2013 15:11:05

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 Re: need con rod/870 in reply to Adirondack case guy, 01-07-2013 17:16:22  
Can or has anyone converted an 870 gas to a diesel? I am thinking of trying it. I know the top end and cam changes but do the 870 gasers have a balanced oil pump? Just an idea now but might try it.
Also I have an extra set of 870 gas rods but they have a smaller wrist pin than my 970 diesel so i would guess they would not work on an 870 diesel.

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01-08-2013 15:30:35

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 Re: need con rod/870 in reply to Nedd, 01-08-2013 15:11:05  
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Some of the very early diesels used the small wrist pins. I sold a set I had from an 870 gas to a guy who needed them for a early 970 diesel.

870 gas uses a balancer oil pump just like the 267 and 336

Aren't the cams the same? What are you planning on using for heads?

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01-11-2013 14:36:47

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 Re: need con rod/870 in reply to RGMartin, 01-08-2013 15:30:35  
I plan on using 970 heads. My VERY early 970 sn number 8650012 had larger wrist pins. I pulled the original rod bearings out dated OCT 69. Just need to find an intake for the 870 diesel. gas cams have a shorter duration from what I have read. Intake is open longer on diesels to max out air into combustion chamber.

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01-11-2013 14:53:35

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 Re: need con rod/870 in reply to Nedd, 01-11-2013 14:36:47  
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0012, That is very early... The 870 gas I knocked in the head for parts was in the 100's and I thought it was early.

Count your head bolts. It sticks in my head that the gas had one less bolt.

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