Brake Tubes And Hoses - Chrysler Stratus RHD 1999 Electronic Service Manual

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DESCRIPTION AND OPERATION (Continued)
Fig. 3 Primary And Secondary Ports With ABS
brake system the vehicle is equipped with. For this
reason, if the power brake vacuum booster requires
replacement, be sure it is replaced with the correct
part for the type of brake system that the vehicle is
equipped with.
The power brake booster can be identified by the
tag attached to the body of the booster assembly (Fig.
4). This tag contains the following information: The
production part number of the power booster assem-
bly, the date it was built, who manufactured it, and
brake sales code.
NOTE: The power brake booster assembly is not a
repairable part and must be replaced as a complete
unit if it is found to be faulty in any way. The power
booster vacuum check valve is not repairable but
can be replaced as an assembly.
Fig. 4 Power Brake Booster Identification
The power brake booster reduces amount of force
required by the driver to obtain the necessary
hydraulic pressure to stop vehicle.
The power brake booster is vacuum operated. The
vacuum is supplied from the intake manifold on the
engine through the power brake booster check valve
(Fig. 4).
As the brake pedal is depressed, the power boost-
ers input rod moves forward (Fig. 5). This opens and
closes valves in the power booster, allowing atmo-
spheric pressure to enter on one side of a diaphragm.
Engine vacuum is always present on the other side.
This difference in pressure forces the output rod of
the power booster (Fig. 5) out against the primary
piston of the master cylinder. As the pistons in the
master cylinder move forward this creates the
hydraulic pressure in the brake system.
Fig. 5 Power Brake Booster Assembly
Different systems and engine combinations require
different vacuum hose routings.
The power brake vacuum booster assembly mounts
on the engine side of the dash panel. It is connected
to the brake pedal by the input push rod (Fig. 5). A
vacuum line connects the power booster to the intake
manifold. The master cylinder is bolted to the front
of the power brake vacuum booster assembly.

BRAKE TUBES AND HOSES

The purpose of the chassis brake tubes and flex
hoses is to transfer the pressurized brake fluid devel-
oped by the master cylinder to the wheel brakes of
the vehicle. The chassis tubes are steel with a corro-
sion resistant coating applied to the external surfaces
and the flex hoses are made of reinforced rubber. The
rubber flex hoses allow for the movement of the vehi-
cles suspension.
BRAKES 5 - 3