On the left side where you pulled the block off, inside the distribution box you will see a notch in there that the block lines up with. If you turn that or forget what feed you were on, you could throw it out of sync. Takes some playing but you can get it back aligned. I had to pull all the gears out of mine to get to the lowest shaft which had a bad bearing that caused several feeds to engage and disengage. That was fun.
Sent from my iPhone using Tapatalk