Setting a Bally EM to free play

Steps

• Turn the credit wheel to zero credits (zero shows in the backglass).
• On the credit stepper find the notched wheel with its fixed pin: it opens one switch only at zero credits.
• Bend that switch so it stays closed in every position, or jumper it.
• Leave alone the switch worked by the movable slotted-head pin: that is the maximum-credit switch and must stay normally closed.

Systems

• Electro-mechanical

Related tips

• Setting an EM game to free play
• Setting a Gottlieb EM to free play

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)