In a message dated 3/19/2016 2:07:52 P.M. Eastern Daylight Time,
kenwilfy@COMCAST.NET writes:

They  aren't hard to fix.  There is a pin that you knock out with a drift
or
alignment pin.  Then two Allen bolts that need to be  tightened.  Then tap
the roll pin back in.  It can be hard to see  but if you know how it works,
it isn't to hard to figure out what is  up.  Sometimes the roll pin is
working its way out and just needs to  be tapped back in place.

i also put a old charge card or plastic putty knife or other thin  piece of
plastic between the roll pin and the vinyl...otherwise the roll pin  will
tear into the vinyl while your knocking it out of the hole.. (BTDT)