It looks like new sleeve bearings are in order. Or possibly the quill is loose in the head frame.Yes, there is some noticeable movement.
I have not had a chance to remove belts to try to isolate where the knocking noise is coming from, but this bothers me. The middle multi-speed pulley is touching the pulley support.
I noticed that the belts are out of alignment and the front belt is narrower (3/8"?) than the rear belt. The noise could be the seam of the narrow belt contacting the MSA.
That seems to be a common issue with the multi-speed attachment. See this post:
http://www.garagejournal.com/forum/showthread.php?p=4870269&post4870269
I don't believe that Craftsman had sold an MSA for a column that size. I think that one was modified to fit a 1-7/8" OD column.
Hmmm. It possibly was made to accommodate the customized MSA base and the shorter span to the spindle pulley.It is a belt tension pulley that is not touching the belt. It looks like if I lowered the front belt to the bottom of the front spindle pulley it would engage.
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