That brings back memories. Dad bought one of those monstrosities of a 77 baler after the gearbox broke on the NH 66. First time he started it up and it tried to tie and the pusher arm up on top stopped like they did when they tied, he thought something was broke. We high tailed it over to a guy east of town who had one and asked him if he knew what was going on.
Worst thing you could do was kill the engine. He carried a belt so he could slip the belts off the engine and start it with the tractor pulley. Mercifully, it caught fire in the field and put itself out of our misery.