Originally Posted by
Ronald Blue
I'm with Paul that the issue is likely 181 and 182 being "frozen". The fact the wheel turns from and 1/8 to 1/4 of a turn indicates the shaft isn't frozen in the threads. The limited movement is the play in the threads. When you get the upper wheel off you will be able to see what's happening. Does the saw show any rust anywhere? If those two items are stuck together it's likely from rust.