Went to use the w-3820 drum sander at the local shop today and the raise and lower mechanism is super tight. It feels like one of the 4 corner screws is galded, but they all look ok.

Is that machine prone to binding up on the raise/lower chain drive?

I looked for an operator manual on it to make sure I’m not missing something easy, but can’t seem to find one online.

does anyone have any tips or advice?

thanks,
howard