Jeep 1996 Grand Cherokee Service Manual - page 179
(9) Replace caliper bleed screw if removed.
REAR DISC BRAKE CALIPER
DISASSEMBLY
(1) Remove caliper and brakeshoes.
(2) Remove mounting bolt boots and bushings from
caliper (Fig. 74).
(3) Pad interior of caliper with minimum, one-inch
thickness of shop towels or rags (Fig. 75). Towels are
needed to protect caliper piston during removal.
(4) Remove caliper piston with short bursts of
low pressure compressed air. Direct air through fluid
inlet port and ease piston out of bore (Fig. 76).
CAUTION:
Do not blow the piston out of the bore
with sustained air pressure. This could result in a
cracked piston. Use only enough air pressure to
ease the piston out. In addition, NEVER attempt to
catch the piston as it leaves the bore. This could
result in personal injury.
(5) Remove caliper piston dust boot (Fig. 77).
(6) Remove and discard caliper piston seal with
pencil, or plastic tool (Fig. 78). Do not use metal tools
as they will scratch piston bore.
ASSEMBLY
(1) Lubricate caliper piston bore and new piston
seal with clean brake fluid.
(2) Install new piston seal in groove machined in
piston bore. Be sure seal is fully seated and is not
twisted. Press seal into place with fingertips.
Fig. 74 Mounting Bolt Bushings And Boots
Fig. 75 Padding Caliper
Fig. 76 Caliper Piston Removal
Fig. 77 Caliper Piston Dust Boot
Fig. 78 Caliper Piston Seal
5 - 30
BRAKES
ZJ
DISASSEMBLY AND ASSEMBLY (Continued)