I have the DW735….
I have done nothing to it except the waxing, sharp blades and an occasional shop-vac to the outside.
Wish I had done more….
The height adjustment handle became harder & harder to turn.
Now the lift mechanism is all messed up. The machine is racked, front to back.
It won't raise or lower. I will be doing non-elective surgery, to heal/repair the patient.
I think an exploratory/cleaning surgery would have prevented any problems.
There have been a few posts, here on LJs, that refer to this same issue.
This one, details the dis-assembly process (I think?)....
http://lumberjocks.com/topics/25101
I haven't opened it up yet….
but I'll bet dust/chip build-up is causing my issue.
YMMV….