Posted by John G. Hasler on June 26, 2008 at 12:49:34 from (72.160.251.220):
The tractor was missing and backfiring. I pulled the lifter cover and found the rockers dry. #1 pushrod barely moves and several others don"t show the minimum lift specified in the IH manual so I"m pretty sure the cam is shot (it was used when I put it in 10 year ago) but I can"t account for the lack of oil up top. Oil should come up through the #1 and #3 pedestals around the bolts. I"ve take the rocker assembly apart: looks ok. I put two pedestals and bolts back in (to hold the head down), filled the #1 and #3 holes with oil (it does not drain back) and cranked the engine. With no plugs it cranks pretty fast and the oil light goes out but no oil comes out those holes. There seems to be plenty of oil on the cam. I realize that the bad cam may result in low pressure but I would think that it would still suffice to make oil rise in those holes with the rocker assembly out. I don't want to put a new cam in until I know what is going on. Any advice?
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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