Kuhn disc mower jamming
Sometimes when I replace blades on my old Kuhn disc mower (GMD55S), it doesn't want to turn. All of the discs seem to be jammed. By wiggling them back and forth, I can usual unjam it and get it turning properly. The oil level is good, the belts are good, nothing is dragging or jamming on the outside.
I presume that I am doing something while changing the bolt and blade that is causing the geartrain inside to jam. Any ideas on how to avoid this jamming?