Thursday, March 5, 2009

Engine Rebuild

I got the case sealed up. When replacing the bearings and trying to put the crank back in, I figured out that the old flywheel side bearing inner race had a larger OD than the new one by about .030" . The overall dimensions were identical, but it's a bad idea to mix and match parts within a bearing. The .030" difference forced me to do what needed to be done anyway. The inner race is pressed onto the crank and needed to be pulled. It took a bearing splitter, heat, and pounding to get the old race off. I heated the new race to around 400F and it went right on with a little pounding. I used spacers and the clutch nut to pull the crank into the clutch side, no pounding required. After discussion on the GS Yahoo group, I put the clutch Belleville washer on the crank with the cone pointed out. The outside edge presses against the inner race of the main bearing while the inside edge presses against the clutch.

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