Difficult to raise/lower 520 worktable

[shaun]

Hi, thanks for reading.

I've just acquired a 9 year old 520 with Precision Pro System. It hasn't been used for a while; nevertheless it is in impeccable condition. However, the worktable is very difficult to move; worse, it makes a horrible metal-on-metal sound when cranked in either direction.

I didn't find anything in the documentation about this condition, so I've turned the table upside-down on padded sawhorses, grabbed WD40, shop towels, and a rubber mallet and.... decided to ask for advice before disassembling the table.

What might be wrong, sticking lock? Even if a squirt of oil would free it up, my OCD nature would demand that I take it apart, clean and inspect/repair, and reassemble. That being said, I prefer following Best Practices.

Please advise!

Thanks,
-Shaun-