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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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310D rod bearings

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Jim Meade

04-11-2007 17:56:07




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I plastigaged two bearings. One was .00175, the other .0015. Standard is .0001-.0015, max is .0025.
Do I run it or put in new rod bearings? The mains checked well in standard tolerances. What would a set of bearings cost?
This engine is from an 1855.




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ejr-IA.

04-12-2007 09:37:53




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 Re: 310D rod bearings in reply to Jim Meade, 04-11-2007 17:56:07  
About 18.00 each.You need CB-1136P clevite.



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WFE 2

04-12-2007 06:00:26




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 Re: 310D rod bearings in reply to Jim Meade, 04-11-2007 17:56:07  
I think the bearing cost is pretty minimal and I would be inclined to renew them, as well as the rod bolts in particular. Jim, curious; what is the situation with the tractor - is this preventative or did it have a failure? How far are you going to get into it? Is engine still in tractor? What was reason for removing pan? Use old rod bolts for gauging oil clearances and only use the new ones when you're ready for final assembly. Did you mike the rod journals and check for out-of-round/taper or is there no reason to suspect a problem? Unless the bearings are entirely indistinguishable from new, I'd renew them. Just make sure you get the correct size for the crankpin rod journal diameter that you have - it may have been ground to an undersize; often this is stamped into the back of the bearing shells but should be verified with a micrometer as well.

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Jim Meade

04-12-2007 17:56:50




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 Re: 310D rod bearings in reply to WFE 2, 04-12-2007 06:00:26  
This is a used engine I am putting in. Allegedly had an overhaul, and I think it did. Bearings are 10 over and look great as does crank. Pulling the pan is just a precaution.
I blew the old one up.



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e

04-12-2007 18:38:55




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 Re: 310D rod bearings in reply to Jim Meade, 04-12-2007 17:56:50  
Does it have the 12 point updated rod bolts? Now would be the time to put them in if it doesn't.



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Jim Meade

04-12-2007 19:55:14




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 Re: 310D rod bearings in reply to e, 04-12-2007 18:38:55  
Yes, it has the 12 pt rod cap screws. I'm going to go with this engine as is. If I can find a block, I may rebuild the old one to spec. I'll have to get the crank welded and turned or get a new one, as the #6 journal is scored.



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