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Thanks DCTOM et al., I appreciate the information youv'e shared. I do have some additional questions and you'll see that I'm very new at this engine repaior stuff.... This tractor was my grandpa's since 1961. He bought it off a car lot when the old bachelor who had it since new, traded it in on a newer car. For a long time it was the only "horse" working on his three quarter section farm year around: it cleared roads in the winter, cultivated and harrowed, and sprayed the fields inthe summer, and pulled the pull type swather and combine in the fall. It was placed in the garage instead of the the family car every winter. As far as I know, the following work was done on it: the valves reground about 25 to 30 years ago...one of the front splines seized one year and was replaced, and one of the chains in the transmission was either adjusted on repaired. It was sold to a fellow who used it for pushing round bales around the farm but for the last few years before I bought it, it was stored in an equipment shed. I tracked it down and bought it from him three summers ago. The same mechanic that diagnosed the wrist pin checked the mains and said that they were fine. I did have a couple more questions: 1) Pertaining to the replacement of the pistons, etc., through the hand holes....How do you hone the cylinders or do you replace with the original rings? 2) I appreciate your strategy for tightening bearings.... But should the lower part of the connecting rod slide front to back on the crankshaft? The front two don't. Would it be worth my while to remove a set of shims first and see? 3) Would you replace the entire assembly: piston, wrist pin, and connecting rod, or would your just replace the rod and wrist pin? 4) If after all this I still have a noise, what should I look for with respect to a worn lifter? Thanks again for the advice...I need to finalize my plan of action before heading west to collect parts/vacation next week. Greg
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