Friday, February 27, 2009

Bearings, clutch, etc

I pulled and replaced all the main bearings. The seals and bearings that I pulled out all appeared to be good, but the new ones are better :) The rear axle bearing was maybe starting to go so replacing it was definitely a good idea. I made a spanner for the rear axle nut. A cutoff wheel, some steel tube, and an hour was all it took to make a nice tool. I replaced the axle bearing with a sealed bearing . (Bearing # 6304 20x52x15) to prevent any oil getting into the rear brake area.
I heated the cases with a propane torch. A couple minutes with heat on the cases allowed the bearings to tap right out, and in.

The flywheel side main bearing is a roller bearing with a removable inner race. The old and new inner races have different outside diameters by around .040 so the race needs replacing along with the rest of the bearing. I didn't catch this at first so I'm getting a bearing splitter to pull the race off the crank. That's all I'm waiting for before engine reassembly.

I rebuilt the clutch. The steel plates were flat with no measurable dish when placed on a flat plate. Some say to orient the dished plates in a particular direction. Since mine were flat, I put them back in the same orientation they came out.

The cruciform was a little worn, but not too bad. I replaced it anyway while I'm in there.

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