Well it always seems like the day after I ask a question, I find the actual answer. Today I continued to have cage sweep problems, but we discovered that two collars that keep the bevel gears lined up were loose, and one of the roll pins was sheared. So basically the sweep was working when there was hardly any material flow, but give it a bit of a load and it plugged. If we contined to have problems after rebuilding the system, I'll disconnect the link to the chain, that way the tattletale will still thing everythings okay even though the sweep is turned off.