for starters, I would boil a few large pans of water and pour into the machine and let set for a while.....check for any leaks....
when I got my 806, it was sitting unused for the greater part of 12 years, upon first fill, water dribbled from the center post......
JohnL offered the boiling water idea.....it softened everything up and re-sealed, been working fine ever since....
check clamps for any rusting, replace if needed......
motor glides may not need replaced, but the lube may be dried out....
always curious of this machine, having time fill, yet is not a solid tub, how do you match the fill to the time without overflowing the machine?