Push relays in by hand gently and straight

When working a relay by hand, press the armature plate straight toward the coil. A sideways or heavy push can knock the plate off its pivot, misaligning every switch on it so they all look misadjusted.

Systems

• Electro-mechanical

Related tips

• Start button does nothing but the start relay works by hand: dirty inertia switch
• Game resets but the outhole relay never fires: feed wire hanging by a strand
• EM relay pulls in and sticks despite a strong spring: clean it or add a thin spacer
• Ball count runs to 10 and the game resets endlessly: dirty ball count stepper
• Game won't start though credits and reels reset: bad joint on the latch coil
• Gottlieb relay return springs
• How latch-trip (interlock) relays work
• Relay banks and their reset coil

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