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Farmall & IHC Tractors Discussion Forum
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BN rocker arms

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RobPA

06-19-2005 17:10:42




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Got my rocker arms and all put back together. Got all of the oiling holes lined up in shaft, but got to looking and how does it get oil? The center "tower" has an oil hole drilled in the bottom next to a stud, but there is no hole in the head anywhere. Does it get oil in the small hole drilled in the top of each rocker arm? Thanks, I'm puzzled.




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Pharmall

06-19-2005 18:01:42




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 Re: BN rocker arms in reply to RobPA, 06-19-2005 17:10:42  
There's an oil hole in the side of the stud at the center tower.



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RobPA

06-19-2005 20:59:00




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 Re: BN rocker arms in reply to Pharmall, 06-19-2005 18:01:42  
I don't remember seeing a hole in that stud. I already put the valve train back on. Maybe I should take it off and look. WOnder if there is a chance it was replaced with one without a hole or I just didn't see it. There must be a passage drilled in the stud hole for that tower also. I missed all of that. Thanks Pharmall.



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Paul in Mich

06-20-2005 04:37:12




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 Re: BN rocker arms in reply to RobPA, 06-19-2005 20:59:00  
Rob, There is a hole in that stud on the center tower. if it is plugged, which may well be the case, you wont get oil to your rocker arm assembly. It needs to be cleaned out. If you remove it, it is easier to see the hole as it runs verticaly from the bottom of the stud and then exits horizontally through the side. Short of removing it, if you can find the exit hole, you may be able to blow it free with air. Another thing to look for is to make sure both plugs are in place at the ends of the rocker arm shaft. They have been known to pop out of either end which will inhibit proper oiling of your rocker arms. Glad your bushing replacement went well.

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RobPA

06-20-2005 18:33:33




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 Re: BN rocker arms in reply to Paul in Mich, 06-20-2005 04:37:12  
Paul and Pharmall- thank you. You guys are exactly right. I never saw that little hole in the stud before. I took it out and blew carb cleaner through it and is open good. Rockers are nice and snug on the shaft now but move easy. No more side to side wiggle. Thanks to you both for all your help. I appreciate it. Rob



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Pharmall

06-20-2005 02:29:02




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 Re: BN rocker arms in reply to RobPA, 06-19-2005 20:59:00  
It's a small hole - maybe .05" daimeter - near the base of the stud, and facing the cavity in the bottom of the tower. Easy enough to check. If there's oil squirting out the holes in the top of the rocker arm when the engine is running you're okay.



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