Peavey bass guitar Owner's Manual page 16

Tuning Machine Adjustments
Over time, tuners can become loose. Get in the habit of checking the tension with every string change. If
you notice a change in the tension of a tuner, use a small flathead or Phillips screwdriver (some require
an allen wrench) to tighten it (turn clockwise) or loosen it (turn counterclockwise) accordingly.
Warning: While the screw should be snug, do not over-tighten as you may strip the screw.
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