As the coin drops down its weight lowers the arm at the top to release the balls from the playing field. As the coin takes the arm down it is caught by the catch at the bottom of the slot which I assume holds the arm down until all the balls are released into the lifting wheel's feed track ---- but whatever releases the catch to allow the arm to return to its starting position and close off the feed track appears to be missing.
Please can you help; any photos would be very much appreciated.
Thank you. John.