Don't know about l's but on M's if the tightener to the cylinder drive is put on the out side of the belt you get the honor of buying a new shaft and belt!  On M's right side remove unloading auger drive pulley----it is left hand thread--may have to make a impact socket out of heavy walled square tub and use big daddy --the 1" drive rattle gun.  Suspend drive pulley in position with chain hoist.  This is a good time to service that drive.  If the drive goes closed it can be spread with a two bars a series of ever wider blocks and the mil.  On tne left side start stripping parts and lAY THEM OUT ON A TABlR EXACTlY as they came off.  There is one piece that uses two pusher bolts.  a simple gear puller does the rest.  New bearings all around and antisieze going back. lol.  Tell something about the spelt business.