Dodge ram truck 3500 1996 Service Manual page 258

S E R V I C E
PH©€EPUHES
(Continued)
SPECIAL TOOL
6670
GROUND.
J 9 3 0 5 - 7 0 :
Fig. 4 Front Antilock Valve Bleed Tool
Vacuum Bleeding
i f vacuum bleeding equipment is being used, i t is
not necessary to hold the front brake metering valve
open. Simply bleed the brakes following the bleed
equipment manufacturers instructions.
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
stem must either be pressed inward, or held outward
slightly, a spring clip tool or helper is needed to hold
the valve stem in position.
Follow the manufacturers instructions carefully
when using pressure equipment. Do not exceed the
tank manufacturers pressure recommendations. Gen­
erally, a tank pressure of 15-20 psi is more than suf­
ficient for bleeding purposes.
Fill the bleeder tank with recommended fluid and
purge air from the tank lines before bleeding.
Do pressure bleed without a proper master cylin­
der adapter. The wrong adapter can lead to leakage,
or drawing air back into the system.
Make sure the front brake metering valve in the
combination valve is held open. A spring clip tool is
best for securing the valve stem in an open position.
1E1
RWAL VALVE/COMBINATION VALVE
REMOVAL
(1) Disconnect ground wire and harness wires from
combination valve switch and RWAL valve (Fig. 5).
(2) Disconnect lines to front and rear brakes from
RWAL and combination valves (Fig. 6).
(8) Remove brake lines connecting master cylinder
to combination valve.
RWAL
VALVE
HARNESS
A N D
CONNECTOR
PRESSURE
DIFFERENTIAL
SWITCH
WIRE
J9405-77
Fig, 5 Waive Harness
COMBINATION
VALVE
RWAL VALVE
LINE
TO
FRONT
BRAKES
J9405-82
Fig. 6 Master Cylinder brake lines
(4) Remove nuts attaching master cylinder and
combination valve bracket to booster studs.
(5) Remove master cylinder.
(6) Remove combination valve, valve bracket and
RWAL valve as assembly.
(7) Remove brake line connecting combination
valve to RWAL valve.
(8) Remove bolt attaching RWAL valve to combina­
tion valve bracket (Fig. 7). Then separate RWAL
valve from bracket.
INSTALLATION '
(1) Install RWAL valve on combination valve
bracket. Do not tighten RWAL valve bolt completely
at this time.