12/23/2014 7:12 AM
You can go to Foley United and find manuals there. In looking at your grinder, from what I've found online it operates the same as the Foley 670 did before they changed to a belt drive system. If you've been tightening up the bearings to get it to grab hold of the shaft you may have worn out the bearings and will need to replace them. They require a certain load and keeping the shaft clean so it travels correctly without needing to be over tight or overloading the bearings is important. There is a contact person on the website, Vince Tomly, who is really good at helping people out over the phone with issues, I'm sure he can be of more help to you.
Regards,