Working on a new to me 315. Replaced the bottom middle hay dog as the one that was in it was broken. Hooked everything up and ran some hay through it to make sure everything was ready. Big bang after I put a little hay through it. Made a little noise here and there as I fed hay. Everything turns over fine and smooth by hand. Tied 3 bales perfectly. Shut it down and cleaned it out. Found the new hay dog broken again. That must have been the loud bang. Seems like the hay dog is travelling up into the plunger too far and is catching the plunger face on the return stroke. Anyone seen this? No up and down movement to plunger, but seems like some side to side movement. Is there a way to adjust without removing the plunger? The plunger isn't moving over far enough to contact the knife, but does have some movement away from the knife. I think this may be where some of the noise is coming from when feeding hay. I broke open a couple of last year's bales, so the compressed flakes were a little tighter than normal fresh hay.