A chime bar rattles or falls, or the chime tone is harsh and weak.

1970s Williams chime bars come loose or sound harsh

Cause: The hole in the post that carries the bar's retaining pin elongates and the post bends or snaps; a missing nylon tip on the plunger speeds this up. Hardened rubber spacers make the tone harsh.

Checks

• Check the posts and pins for wear grooves and elongated holes.
• Check each chime plunger has its nylon tip.

Fix

• Fit a new chime box and pins, or replace the posts with new metal ones pop-riveted in place.
• Replace the rubber spacers, one under and one over each bar; a cut rubber post sleeve works.

Systems

• Electro-mechanical

Related tips

• Make a replacement 1970s chime bar from aluminum stock

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