I recently converted my G0704 to belt drive using the Benchtop Precision kit. However, when I replaced the quill I discovered it was quite tight within the head casting. It was fine before the upgrade, but now it takes a fair amount of force to move the quill up and down, and the quill spring isn't strong enough to draw it back up.
I didn't touch the quill portion of the spindle. Only the upper drive portion of the spindle is changed as part of the conversion, so I'm at a bit of a loss as to how it could've gotten so tight. I made sure to thoroughly clean the casting and the quill and apply fresh oil before reinstalling it. My only thought right now is that maybe when I reinstalled the upper drive portion of the spindle that somehow that warped the casting just enough to cause problems? That doesn't seem likely to me, however.
Thanks for any help!