You have put a slug in the old gal and now the cam is out of whack. look at the end of your auger and I bet you will see where the adjusting bolts have slipped. Been there--done that. Quick fix for me. Hope so for you.
Be sure to check the finger timing shaft on the right side, we had the pipe _ shaft break on a 1020 platform a few years ago. Might the entire header frame be bent backwards or saggingIJ Eventually more headers will have center supported augers like the Cat 535 and 540' so center clearance controlled by a center support bearing, where the loading is the heaviest.
