Looks kinda like an odds follower from a continental. It should run during multiple coin pays. Don't dick with the switches....
Bally used at least 3 kinds of hopper types. One is straight coin pays with multipliers (those X units you hear so much about), the double-up type of hopper (in which a mechanical step is held down by a solenoid), and the Continental type. The Conty, resets after paying one coin's worth once for every additional coin played as coins in. The conty is a 6 coin machine, so the hopper will reset 5 times if you play full odds. If your machine fritzes during 4 coin odds pays, what does it do on 5 odds and 6 odds pays???
What does an odds follower do? It works a whole bunch of stuff, and frankly I don't know enough about it to talk about it. You can trace back the switch wires to get a good clue. If the machine has an odds disc, well the follower then will allow it to step up to the next increment of payout. I would gather it also kills the coin lockout coil, and perhaps keeps the features lights off during pays, and maybe resets the safety timer motor, kills power to payboard during payfingers reset, causes the payboard reset solenoid to fire at the right time, looks for pay to be over (to reset??)and who knows what else??
It would be good for us to have on line what this unit does, so I encourage anyone to help fill in the info on the nasty thing.
Historians will be forced to following the wiring, too....
Let us know the status on how the 5th and 6th coin odds pays go, and please, where do your hopper payboard wiper fingers end up in these cases?