Chrysler 1997 Stratus Convertible RHD Service Manual page 118

5 - 16 BRAKES
DIAGNOSIS AND TESTING (Continued)
Fig. 26 Non-ABS Brake Proportioning Valve
The test procedure for a premature rear wheel skid
is the same for both rear wheel proportioning valves.
The pressure test fittings used for each proportioning
valve though are different due to proportioning valve
and brake tube nut thread sizes being unique for
each rear wheel. After road testing vehicle to deter-
mine which wheel skids first, the proper test fittings
required will have to be determined. Then follow the
procedure below for testing the required proportion-
ing valve.
(1) After road testing vehicle to determine which
rear wheel exhibits premature rear wheel skid, refer
to (Fig. 26) to determine which proportioning valve
needs to be tested.
(2) Remove brake line (Fig. 26) from the propor-
tioning valve controlling the rear wheel of the vehicle
which has premature wheel skid.
(3) Remove the proportioning valve from the rear
brake line.
CAUTION: Be sure the pressure test fitting being
installed into proportioing valve, has the correct
thread sizes for installation into proportioing valve
and installation of rear brake line tube nut.
(4) Install Pressure Test Fitting, Special Tool
6805-1 or 6805-2 on rear brake tube which the pro-
portioning valve was removed from.
(5) Install proportioning valve into pressure test
fitting installed on rear brake tube.
CAUTION: Be sure the pressure test fitting being
installed into proportioning valve, has the correct
thread sizes for installation into the proportioning
valve and installation of brake tube fitting.
(6) Install Pressure Test Fitting, Special Tool
6805-3 or 6805-4 into outlet of the proportioning
valve.
Location
(7) Connect brake hydraulic line onto pressure test
fitting installed in proportioning valve.
(8) Install a Pressure
C-4007-A into each pressure test fitting. Bleed air out
of hose from pressure test fitting to pressure gauge,
at pressure gauge to remove all trapped air. hose.
(9) With the aid of a helper, apply pressure to the
brake pedal until reading on proportioning valve
inlet gauge, is at the pressure shown on the following
chart. Then check the pressure reading on the pro-
portioning valve outlet gauge. If proportioning valve
outlet pressure does not agree with value shown on
the following chart, when inlet pressure shown on
chart is obtained, replace the proportioning valve.If
proportioning valve is within pressure specifications
do not replace proportioning valve.
(10) Check rear wheel brake shoe linings for con-
tamination or for replacement brake shoes not meet-
ing OEM brake lining material specifications. These
conditions can also be a possible cause for a prema-
ture rear wheel skid.
(11) Install proportioning valve in rear brake line
and hand tighten both tube nuts until they are fully
seated in proportioning valve.
(12) Tighten both brake line tube nuts at the pro-
portioing valve to a torque of 17 N·m (145 in-lbs.).
(13) Bleed the affected brake line. See Bleeding
Brake System in the Service Adjustments section of
the manual for proper bleeding procedure
PROPORTIONING VALVE TEST WITH ABS
BRAKES
If premature rear wheel ABS cycling occurs on
hard brake application, it could be an indication that
a malfunction has occurred with one of the propor-
tioning valves.
One proportioning valve controls the right rear
brake, and the other proportioning valve controls the
left rear brake (Fig. 27). Therefore, a road test to
determine which rear brake slides first is essential.
Once the wheel which is skidding first is determined,
use the following procedure to diagnose the propor-
tioning valve.
The test procedure for premature rear wheel ABS
cycling is the same for both rear wheel proportioning
valves. The pressure test fittings used for each pro-
portioning valve though are different due to propor-
tioning valve and brake tube nut thread sizes being
unique for each rear wheel. After road testing the
vehicle to determine which wheel exhibits premature
ABS cycling, the proper test fittings required will
have to be determined. Then follow the procedure
below for testing the required proportioning valve.
(1) After road testing the vehicle to determine
which rear wheel exhibits premature ABS cycling,
refer to (Fig. 27) to determine which proportioning
valve needs to be tested.
JX
Gauge, Special Tool