Dodge RAM TRUCK 1500 1995 Service Manual page 207

REAR WHEEL ANTILOCK BRAKE (RWAL) SYSTEM 5 - 35
(10) Bleed combination valve next and rear brake
antilock valve afterward. Bleed valves at brakeline
fittings one at a time. Surround line fittings with
shop towels to catch fluid bled from valve.
(11) Bleed first wheel brake unit as follows. Start
at passenger side rear wheel:
(a) Open caliper or wheel cylinder bleed fitting
1/2 to 3/4 turn.
(b) Have helper press and hold brake pedal to
floor.
(c) Tighten bleed fitting and have helper release
brake pedal.
(d) Continue bleeding operation until fluid enter­
ing bleed container is clear and free of bubbles.
(12) Repeat bleeding operation at remaining wheel
brake units. Discard fluid bled into glass container. It
should not be reused.
(13) Check and top off master cylinder reservoir
fluid level.
(14) Verify proper brake operation before moving
vehicle.
PRESSURE BLEEDING
The front brake metering valve (in the combi­
nation valve), must be held open when using
pressure bleeding equipment. This is necessary
because the 20 psi exerted by pressure equip­
ment exceeds the valve hold off point causing it
to close. The metering valve is in the forward
end of the combination valve. The valve stem is
accessible after removing the rubber protector
cap that covers the stem. The stem must be ei­
ther pressed inward, or held outward slightly
in order to bleed the front brakes. Use a clip
style tool such as Special Tool C-4121 to hold
the stem in or out. Do not use pliers or similar
tools a the stem and valve will be damaged.
(1) Fill bleeder tank if necessary.
(2) Purge air from bleeder tank and lines before
proceeding.
(3) Clean master cylinder reservoir and cover thor­
oughly.
(4) Remove master cylinder cover and install suit­
able adapter (Fig. 21). Various types of adapters are
usually available from the pressure tank manufac­
turer.
(5) Connect bleeder tank pressure hose to adapter
(Fig. 21).
(6) Bleed master cylinder and valves. Bleed master
cylinder first, combination valve second and RWAL/
ABS valves third.
(7) Bleed rear wheel brake units as described in
manual bleeding procedure.
(8) Bleed front wheel brake units. Use a clip style
tool to hold metering valve in or out. Or have a
helper hold valve in or out by hand. Amount of valve
stem movement needed to hold valve open is quite
modest. Do not use excessive force.
(9) Remove pressure bleeding equipment and top
off master cylinder reservoir.
CAUTION: Verify that the diaphragm seal is firmly
seated in the master cylinder cover. If the seal is
improperly seated, it will be displaced when the
cover is installed. This will result in fluid leakage
and eventual contamination.
(10) Verify firm brake pedal before moving vehicle.
(11) Repeat bleeding procedure if system warning
lights come on, remain on, or if pedal is still spongy.
Fig. 21 Typical Pressure Bleeder Tank And Adapter
END OF DOC BR9505.1