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scratch on crankshaft
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Posted by sricks on August 09, 2004 at 09:22:06 from (68.92.41.1):
I have a 6AT3.4 which has a spun rear main bearing. It was a military surplus unit that drove a compressor and generator via belts (180 degrees apart) directly off the flywheel pulley. I assume the loading was not very even and this is what caused the rear bearing and seal to fail. I have pulled several other caps and all the other bearings look fine. Slight scoring on crankshaft. Is it foolish to believe I can polish it out OK, put new bearings in and put the engine back in service. Should I just junk this thing or is it worth resurrecting. New bearings will run about $600 from Cummins. Thanks for your suggestions. Scott
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