Sometimes a metal coil sleeve becomes so worn that it causes sluggish action
on a flipper, bumper, or kicker. When you try to remove the sleeve to put
in a new one, the sleeve is totally seized up and just won't come out. The
solution is to wrap one hand around the coil and activate the switch that
turns it on. Keep it on for 10 or 20 seconds. You will feel the coil start
to get very warm inside your hand. Before it gets too warm to keep your
hand around it, turn the coil off and quickly grab the flanged end of the
sleeve with pliers or vicegrips. Still holding the coil, rotate and pull on
the sleeve and it should come out fairly easily (the heat frees up the
sleeve).
WARNING: This is an advanced tip. Only do this if you are
comfortable working around the inside of a machine that is powered up.
Also, keeping the coil energized for too long will destroy it, so be really
careful when you do this.
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