Jeep 1997 Grand Cherokee Service Manual page 192

RESERVOIR
BLEEDING TUBES BLEEDING TUBES MASTER CYLINDER HOUSING
5 - 12 BRAKES
SERVICE PROCEDURES (Continued)
NOTE: If master cylinders has one reservoir open-
ing, position both bleed tubes into the single reser-
voir opening (Fig. 14).
(3) Fill reservoir with fresh brake fluid.
(4) Press cylinder pistons inward with wood dowel.
Then release pistons and allow them to return under
spring pressure. Continue bleeding operations until
air bubbles are no longer visible in fluid.
Fig. 13 Master Cylinder Bleeding
Fig. 14 Master Cylinder Bleeding
BRAKE BLEEDING
Use Mopar brake fluid, or an equivalent quality
fluid meeting SAE J1703-F and DOT 3 standards
only. Use fresh, clean fluid from a sealed container at
all times.
Do not pump the brake pedal at any time while
bleeding. Air in the system will be compressed into
small bubbles that are distributed throughout the
hydraulic system. This will make additional bleeding
operations necessary.
Do not allow the master cylinder to run out of fluid
during bleed operations. An empty cylinder will allow
additional air to be drawn into the system. Check the
DOWEL TAINER TIALLY FLUID WITH FLUID BLEED HOSE FILLED CON- PAR-
cylinder fluid level frequently and add fluid as
needed.
Bleed only one brake component at a time. Recom-
mended bleed sequence is:
• master cylinder
• combination valve
• right rear wheel
• left rear wheel
• right front wheel
• left front wheel
MANUAL BLEEDING
(1) Remove reservoir filler caps and fill reservoir
with Mopar, or equivalent quality DOT 3 brake fluid.
(2) If calipers, or wheel cylinders were overhauled,
open all caliper and wheel cylinder bleed screws.
Then close each bleed screw as fluid starts to drip
from it. Top off master cylinder reservoir once more
before proceeding.
(3) Attach one end of bleed hose to bleed screw
and insert opposite end in glass container partially
filled with brake fluid (Fig. 15). Be sure end of bleed
hose is immersed in fluid.
(4) Open up bleeder, then have a helper press
down the brake pedal. Once the pedal is down close
the bleeder. Repeat bleeding until fluid stream is
clear and free of bubbles. Then move to the next
wheel.
PRESSURE BLEEDING
If pressure bleeding equipment will be used, the
front brake metering valve will have to be held open
to bleed the front brakes. The valve stem is located
in the forward end of the combination valve. The
Fig. 15 Bleed Hose Setup
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