Originally Posted by
sdfoiler
Trying to get some cleaning/maintenance done to my 1990 4020. I measured the drawbar force and it's around 1175. I've only had the machine for 1.5 years, so I have no idea when the bellevilles were changed last. Sounds like the force is supposed to be up in the 1700 range. Should I swap out the belleville washers? Never done it before, but it doesn't look too terribly difficult. I'm not having any issues with the tool changes, although the surface finish could be a little better. Just wondering what the cutoff is for when to change them out.
Suggestions?