Cleaning and adjusting the pop bumper spoon switch

Steps

• Remove the spoon switch assembly from the game.
• Clean out the crud inside the spoon with alcohol and leave it dry (lubricant only collects dirt).
• Polish the spoon with 1000 grit or finer paper.
• Refit it and adjust with the skirt in place: only slight tension on the skirt stem so the skirt centres.
• Make sure the stem doesn't sit too far out of the spoon, or the switch sticks closed and locks the bumper on; move the switch to adjust.

Systems

• Electro-mechanical

Related tips

• How an EM pop bumper works
• Rebuilding an EM pop bumper
• Pop bumper armature links: which to use and how they go together
• Making pop bumpers kick harder
• Strengthening pop bumpers by removing coil windings
• Renew sleeves on flipper, pop bumper and sling coils
• Game resets but no playfield solenoid works
• Gottlieb pop bumper relay and score reel stuck on

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