Jeep 1996 Grand Cherokee Service Manual - page 164
(2) Disconnect brakelines that connect combination
valve to HCU.
(3) Disconnect wire from combination valve switch
terminal. Be careful when separating wire connector
as lock tabs are easily damaged if not fully disen-
gaged.
(4) Slide HCU solenoid harness connectors off com-
bination valve bracket. Then move harness aside for
working clearance.
(5) Remove
nuts
attaching
combination
valve
bracket to booster studs and valve bracket off booster
studs (Fig. 21).
INSTALLATION
(1) Position valve bracket on booster studs and
tighten bracket attaching nuts to 25 N·m (220 in.
lbs.).
(2) Align and start all four brakeline fittings in
combination valve by hand to avoid cross threading.
Then tighten fittings just enough to prevent leakage.
(3) Connect wire to differential pressure switch in
combination valve.
(4) Tighten brakeline fittings at master cylinder
just enough to prevent leakage.
(5) Attach HCU solenoid harness connectors to
combination valve bracket.
(6) Bleed brakes.
MASTER CYLINDER
REMOVAL
(1) Remove brakelines from master cylinder.
(2) Remove combination valve.
(3) Remove nuts that attach master cylinder to
booster studs (Fig. 22). Retain nuts as they are
special locking types.
(4) Remove master cylinder from booster.
INSTALLATION
(1) Remove protective cover from end of primary
piston.
(2) Bleed master cylinder.
(3) Slide master cylinder onto booster studs. Align
booster push rod in cylinder primary piston and seat
cylinder against booster.
(4) Install master cylinder mounting nuts and
tighten nuts to 25 N·m (220 in. lbs.). Use original
or factory replacement nuts only.
(5) Install combination valve and tighten mounting
nuts to 25 N·m (220 in. lbs.).
(6) Install brakelines that connect master cylinder
to combination valve.
(7) Fill and bleed brake system.
POWER BRAKE BOOSTER
REMOVAL
(1) Remove air filter housing,.
(2) Remove master cylinder, combination valve,
and HCU.
(3) Disconnect vacuum hose at booster check valve
(Fig. 23).
(4) Remove retainer clip that booster push rod to
pedal pin (Fig. 24). Then slide push rod off pin.
(5) Remove four locknuts that attach booster to
dash panel.
(6) In engine compartment, slide booster forward,
tilt it upward slightly, and remove it from engine
compartment.
Fig. 20 Combination Valve Brakelines
Fig. 21 Combination Valve Bracket
Fig. 22 Master Cylinder Mounting
ZJ
BRAKES
5 - 15
REMOVAL AND INSTALLATION (Continued)