Powermatic 2000 caster system

Anyone understand or troubleshoot the Powermatic 2000 (pre-B?) castor system? I got a used Powermatic from maybe 2014-2017 and the bracket tensioner for the chain was broken – not a problem if I don’t need to move the saw, but while investigating the issue I found that pulling out the wheel and turning it did not actually end up turning the shaft in the cabinet where the wheels are. I had the whole saw leaning up at 45 degrees and uncovered the broken bracket, but when turning the wheel it would create too much resistence to safely continue after just a few turns and I could not feel the shaft turning below at any time.

Any help from some who tracks this system would be appreciated.

Rolf

7/19/2020 Update: I solved this: the lifters were locked, I assume from a previous owner’s effort to tighten or loosen them and then ignoring it all for a long time. I disassembled the whole caster system and with a long breaker wrench popped each one loose. I rebuilt it all (about 5 times, each time forgetting a step and having to back up to where I could remember to include-the-washer/thread-the-chain, etc, and now it works, and I never turn the wheel to the “end” of its scope. Luckily my floors are very flat, so I can move it the few times I’ve needed to easily.