I have looked at the components in the parts manual. I believe there is a possible bent part. Measuring the runout will require a dial indicator that moves side to side. (common in machine trades. Place this on the oil pump stub through the hole where the distributor mounts, touching the side of the connection. Have someone crank the engine by bumping the starter while you watch the dial. It should be less than .001" change. another way to check is to put a tube (even plastic stiff tube), about a foot long over the drive and rotate it. If the mavement is kinked at the connection, it might be a bent oil pump shaft at the drive gear or above. If it seems to be following the oil pump shaft in a linear manor, but wobbling in a circle, I would suspect a non concentric cam shaft drive gear. Pulling the pump can be definitive, but a pain. Putting the dial indicator on the cam gear teeth and finding them to be not the same height as it turns would ba definitive as well. Jim
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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