Hello. I am a newbie restoring a No. 4. I have cleaned all of the moving parts and am putting everything back in place. When I turned on the motor for the first time and lowered the oscillating and form roller assemblies, I noticed a faint clacking sound that didn’t seem right. I turned off the motor and examined the form roller gears. I saw that, when the clutch is not engaged, there is more clearance between the roller gears and the clutch on the rear roller (closest to the feedboard) than there is on the forward roller. The first photo shows this; for the photo I rotated the gear to better show the difference.
I then examined the brass plate that engages the clutch. There is considerable wear where the plate meets the roller pins, somewhat more wear on the forward side. The second photo shows this. I think this explains the clearance difference, though it also could be influenced by accumulated wear on the roller that moves the brass plate (third photo) or by the brass plate being a bit skewed, though it seems aligned properly.
My question is, how much clearance should there be between the roller gear and the clutch when the clutch is disengaged, and how would I achieve this in my situation?