As you may remember, in these worm & gear assemblies, the string post and gear are a single piece that is inserted through the big hole, and a round plug covers the hole. For some reason, although never removed, some plugs no longer fit very tightly, and downward pressure on the string post (for example while changing a string) pushes the gear against the round plug, popping it out into free fall.
What can be done to tighten up the fit so the plug stays in place?
(photos from Frank Ford's "Tune up your Gears" maintenance page in Frets.com)
Tags: Grover, Rotomatic, tuner
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