Disc Brakes (Front) - Chrysler Stratus RHD 1999 Electronic Service Manual

5 - 4 BRAKES
DESCRIPTION AND OPERATION (Continued)
PROPORTIONING VALVE
This vehicle uses screw-in proportioning valves in-
line with the rear brake tubes. The chassis brake
tubes connect directly from the master cylinder or
HCU (on ABS vehicles) to the brake flex hose. The
brake system uses two proportioning valves in-line
with each of the rear wheel chassis brake tubes. The
non-ABS equipped proportioning valves are located
on the front suspension crossmember in the same
area where the integrated control unit mounts on
ABS equipped vehicles (Fig. 6).
Fig. 6 Proportioning Valves For Non ABS Equipped
On vehicles equipped with antilock brakes, the pro-
portioning valves are located at the rear of the vehi-
cle (Fig. 7). Each proportioning valve mounts directly
to the flex hose for the rear wheel brakes and has
the chassis brake tube for each rear brake connected
directly to it (Fig. 7).
Fig. 7 Proportioning Valve Location For ABS
Equipped Vehicles
Proportioning valves balance front to rear braking
by controlling at a given ratio, to increase the rear
Vehicles
brake system hydraulic pressure above a preset level
(split point). Under light pedal application, the pro-
portioning valve allows full hydraulic pressure to be
applied to the rear brakes.
There are two proportioning valve assemblies used
in each vehicle. Due to differences in thread sizes,
each proportioning valve has a different part number.
During any service procedures identify valve assem-
blies by supplier part number and or the bar code
label and stamp identification band (Fig. 8). All vehi-
cle brake systems use a common calibration for the
proportioning valve. The split point is 500 psi and
the slope is 0.43 on rear drum brake vehicles. Vehi-
cles with rear disc brakes have a split point of 400
psi and a slope of 0.34.
Fig. 8 Proportioning Valve Identification

DISC BRAKES (FRONT)

The front disc brakes (Fig. 9) and (Fig. 10) consists
of the following components:
• Braking disc (brake rotor)
• Caliper assembly - single piston, floating type
• Brake pads and linings
The front disc brakes used on this vehicle are dou-
ble pin floating calipers.
The front disc brake double pin calipers are
mounted directly to the steering knuckles and use no
adapter. The caliper is mounted to the steering
knuckle using bushings, sleeves and 2 guide pin bolts
Fig. 9 Front Disc Brake Components
JA