Chrysler PT Cruiser Service & Repair Manual page 159

PT
PROPORTIONING VALVE (Continued)
CAUTION: Be sure the pressure test fittings being
installed into master cylinder and proportioning
valve, have the correct thread sizes needed.
(5) Install the Brake Pressure Adapters, Special
Tool 8644 and 8187-2 onto the proportioning valve
(Fig. 91).
Fig. 91 Tools On Valve
1 - PROPORTIONING VALVE
(6) Install the proportioning valve (with tools) back
into the outlet port on the master cylinder.
(7) Attach a Pressure
C-4007-A, to each pressure adapter (Fig. 92).
(8) Remove the brake pedal holding tool. Bleed any
air out of the pressure gauge hoses at the pressure
gauge.
(9) With the aid of a helper, apply pressure to the
brake pedal until the reading on proportioning valve
inlet gauge is at the target inlet pressure shown in
the Brake Proportioning Valve Applications And
Pressure Specifications table following this proce-
dure. If the inlet gauge pressure overshoots its target
pressure when the pedal is depressed, release the
brake pedal, relieving the pressure in the system,
before reapplying the pedal to reach the target pres-
sure at the inlet gauge. This is necessary to get an
accurate reading of the outlet pressure.
BRAKE PROPORTIONING VALVE APPLICATIONS AND PRESSURE SPECIFICATIONS
Sales
Brake System Type
Code
BRB 15 Disc/Drum
Gauge, Special Tool
Split Point Slope
400 psi 0.34
Fig. 92 Pressure Gauge Set
1 - SPECIAL TOOL C-4007–A
(10) Once inlet pressure has been achieved, check
the pressure reading on the proportioning valve out-
let gauge. If the proportioning valve outlet pressure
does not agree with value shown in the table, replace
the proportioning valve. If proportioning valve is
within pressure specifications, the valve is good and
does not require replacement.
(11) Reinstall the brake holding tool on the brake
pedal and remove the test equipment from the vehi-
cle.
(12) Remove the tools from the proportioning
valve.
(13) Install the proportioning valve in the master
cylinder and hand tighten until the proportioning
valve is fully installed and its O-ring seal is seated
into the master cylinder. Tighten the proportioning
valve to a torque of 40 N·m (30 ft. lbs.).
(14) Install the brake tube on the proportioning
valve. Tighten the tube nut to a torque of 17 N·m
(145 in. lbs.).
(15) Bleed the affected brake line. (Refer to 5 -
BRAKES - STANDARD PROCEDURE)
Inlet
Identification
Black Band
BRAKES - BASE
Outlet Pressure
Pressure
1000 psi 600-700 psi
5 - 51