Heyo! I'm in the process of repairing an old Mills castle front slot machine that used to sit in my Grandparents liquor store. It was completely inoperable, but a complete tear-down, unjamming, and re-greasing fixed almost everything!
Unfortunately the jackpot still doesn't work and does not pay out. Interestingly enough, the reserve still works, and dumps the coins into the already-full jackpot holder (apologies for any terminology mistakes, I'm new to all of this).
After watching some videos on the inner mechanics of the jackpot mechanism, I tracked down the issue to this piece on the side.
It appears to be locking the payout flap in place. The little arm seems like it should be pressing on something in the mech, but there doesn't seem to be anything to press down on it. It does look pretty bent up, though. Taping it down to the jackpot chute solves the problem, but that's a total band-aid solution. I was wondering if any of you guys knew what the purpose of this piece was and how I could fix it.