The pins slide all the way out of the boots.  The ends of the boots
detent into grooves on either end of each pin, so be careful removing
the pins so you don't tear the boots (the boots and the rubber bushing
that surround the pin are actualy one continuous piece of rubber that
fit in the hole through the caliper - caliper metal surrounds the rubber
bushing, rubber bushing surrounds the pin - pin slides back-and-forth in
the bushing).

Use a good quality silicone brake grease to coat the pins and the inside
of the boots/bushings, then re-insert the pins.  Make sure the ends of
the boots pop back into place in the pin grooves.  Wipe off any excess
grease on the outside of the boots. Before re-attaching the caliper.  If
any boots are torn, replace them - very easy and inexpensive - NAPA has
them.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
adddress with the letter 'x')