Doc Greiner's passed away, alas. And his site has scattered to other webpages.
LX200Classic - 11 page .pdf file w/ photos has good description of RA motor assembly removal
MAPUG - binding RA gear page , loose RA motor
Bruce Johnstone's - common RA/Dec fixes
and his Supplemental Fix page; the first photo shows the RA mesh adjustment screw
LX200 RA Problems - Netherlands site loads slowly. But some useful photos, and adjusting Pot's for "runaway" problem.
AstroGene - images from LX200 Classic RA problem and descriptions