Just purchased a Deere 336 baler. Front top drive chain sprocket was sharp, so I replaced sprocket. Bought the owners manual at local JD dealer for the baler and carefully followed step by step in timing the machine, including needles. My problem is the baler crank stop (or plunger stop) is stopping the plunger after needles make a bale tie. This happens turning flywheel by hand after tripping the needles also. The plunger stop will not retract back to neutral (out of the way) until the needles return to home (like it should). My problem is that when the plunger is starting a compression stroke, the stop is still out. I can pull the stop out of the way to let the plunger crank go by and before the plunger fully extends to the end of the stroke, the stop finally retracts. The needles are returning home fully and tripping the plunger stop as they should, they just aren't home until plunger is 3/4s of the way through a compression stroke. I know this sounds like a timing issue but I have went through every step and all measurements 3 times from the owners manual and am really scratching my head on this. Help!