I'd say Daniel tightened the nuts as usual and found the wheel didn't seem tight and so tightened some more - I'd bet the wheel was already like that from having been run loose

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics