A little more history. Dad bought this tractor in 82 from original owner, a good friend retired from farming. So we know the history of this one from day one. The rod bearings we took out were stamped 11-73, so we are confident this motor has not been apart, ever. The hours are probably in the 12k area, possibly many more. Tractor has not really been worked "hard" since dad bought it in 82, used it to plant, spray, pump water but no tillage.
My son used a dial indicator and had a 0. He did a gear mesh test on the cam/crank gear with gear marking paint. The pattern is very consistent, tooth to tooth, across the tooth in the same pattern all the way around both gears but still metal to metal in a small area on each tooth. Again, the crank gear we replaced looked pretty bad on about 14 teeth. Also, the thrust bearing had failed at some point. Part of it was in the pan when removed. Don't know if that may have something to do with this issue.
Doc, we did install the front cam bearing wrong the first time, driving it in crooked. Wrinkled it just a bit. Bought a 2nd new one and the cam really feels fine up until the cam gear meets crank. We had the crank in before the cam bearings so can't verify the cam in the running position. Really hate to pull the crank back out. The original front cam bearing we took out was worn pretty bad.
Our next thought was to install hyd pump and see how those gears mesh? I'm thinking cam gear failure, fatigue, wear, I don't know...Thanks
Leon B MO
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