Posted 8/3/2017 11:43 (#6165322 - in reply to #6164748) Subject: RE: Tips to get a 643 head to do better
CIL
Replace the snapping rolls as others mentioned, but I would also add the calmer gathering chain slow down kit. Allows us to easily go 4 to 4.5 mph with a 9410 and 643 and helps smooth out feeding and keeps more trash out of the head. We've run it several years with calmer rolls and no wedge kit and have very little header loss but ours is a low tin oil bath head.