The stuffer timing sequence and specs on a Hesston 4590 leave some room for interpretation. I realize that chain wear will cause some variance in where things line up. I'm using the process outlined on the machine and in the service manual.
Step 1: Rotate the flywheel to move the crank arm against the plunger stop. Easy.
Step 2: The stuffer shaft grease fitting must visible in, or no more than 2 inches left of the lubrication hole. Hmm. Does visible mean centered or up to 2" left?
Step 3: Rotate the flywheel until the plunger knives are the closest to the stuffer fingers. Measure distance. Stuffer fingers must clear plunger knives with 1/4 inch minimum clearance.
On the particular unit I'm working on at the moment, if I center the stuffer shaft grease fitting in the lube hole, my knife/finger clearance is 7/8 inch. If I jump a few links, I can easily set my knife/finger clearance to 1/4 inch, however when I do that, the grease fitting is now to the right of the lubrication hole. Mind you I can still see it if I look in at a slight angle, but it is not visible if looking straight in the hole.
What provides the most ideal stuffer timing - having the grease fitting visible or left of the lube hole, or getting as close to 1/4" knife/finger as possible?
Attached Thumbnails
Hesston Inline - Setting Ideal Stuffer Timing
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