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Loose Plug
The
plug is held into the
hull by being wider at the front and by having a
cam on the back that is bigger than the hole drilled into the
hull. If the cam is not properly
installed, the plug can move in and out of the lock slightly. On the
outward stroke of the
pick, the plug will move
forward, and if you
apply pressure on the inward stroke, the plug will be pushed back.
The problem with a
loose plug is that the driver pins tend to
set on the back of the
plug holes rather than on the sides of the holes. When you push the plug in, the drivers will unset. You can use this defect to your advantage by only
applying pressure on the outward or inward
stroke of the pick.
Alternatively, you can use your
finger or
torque wrench to
prevent the plug from
moving forward.