Jeep 1997 Grand Cherokee Service Manual page 211

CALIPER CALIPER PISTON SEAL PISTON
ZG
DISASSEMBLY AND ASSEMBLY (Continued)
Fig. 77 Caliper Piston Removal
Fig. 78 Caliper Piston Dust Boot
Fig. 79 Caliper Piston Seal
ASSEMBLY
(1) Lubricate caliper piston bore and new piston
seal with clean brake fluid.
PISTON DUST BOOT AIR GUN NOZZLE PRY T OOL WOOD PENCIL PADDING
(2) Install new piston seal in groove machined in
SUITABLE INSTALLER TOOL
piston bore. Be sure seal is fully seated and is not
twisted. Press seal into place with fingertips.
(3) Lubricate caliper piston with clean brake fluid
and start piston into bore and seal by hand. Use a
twisting, rocking motion to start piston into seal.
Keep piston level while starting it in seal other-
wise seal can be folded over.
(4) Once piston is firmly started in seal, press pis-
ton about 2/3 of way into bore with C-clamp or bench
vise (Fig. 80).
CAUTION: Position
between the piston and C-clamp or vise jaws. The
wood block will avoid chipping or cracking the pis-
ton while pressing it into place.
(5) Install dust boot on piston. Be sure boot lip is
fully seated in groove at top of caliper piston.
(6) Seat dust boot in caliper either by hand, or
with a suitable size installer tool (Fig. 81).
SIZE PISTON
a protective
Fig. 80 Piston Installed In Caliper
Fig. 81 Seating Caliper Piston Dust Boot
BRAKES 5 - 31
DUST BOOT GROOVE DUST BOOT
wood block