Hi, Also note that the delay relay circuit uses the little tiny microswitch that rides on the outer white wheel of your 100 tooth paygear behind the hopper board. This switch opens every 4 or 5 steps of the payboard wheel (it falls in the notch), and this is what works the delay relay. The delay relay is designed to momentarily turn off the safety timer motor. When the timer motor turns off, the spring in it tends to reset the motor assembly back to its normal state -- giving the hopper more time to make the payout. There is some kind of resister capacitor timing circuit involved. If the safety timer motor continues running without being reset by the delay relay circuit, then it will time out the machine, turn it off, and the little red light that lives behind the hopper will turn on. This circuit is used normally with a machine that uses X-circuits (the white donut type wheels in the top unit) during multiple coin pays, and the time setting on the safety time motor is generally very very short (look in the back at the timer wheel and you should see it is set at about 15 seconds or so IIRC) (Normal type payouts -- machines not using the X-units -- are usually set for a much longer time). The worry was that without this delay relay circuit, the machine could run away and dump out the hopper contents if one of the X-units fails.
You CAN eliminate the whole circuit, (I believe) by increasing the time on your safety timer motor, and then cutting out the hot wire to the delay relay coil and thus taking it out of circuit. Of course if you do this you MUST tape off all exposed wires so nothing shorts out. Hope that gives you a bit more insight into how it works.