Front Disc Brakes; General Information - Chrysler Concorde 1993 Service Manual

General Information

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Service Precautions . . . . . . . . . . . . . . . . . . . . . . . 29
GENERAL INFORMATION
The single piston, floating caliper disc brake as-
sembly (Fig. 1) used on the L.H. platform vehicle
consists of the following components.
• The driving hub and bearing assembly
• Braking disc (rotor)
• Caliper assembly
• Shoes and linings
• WARNING: THE PISTONS THAT ARE USED
IN THE FRONT AND REAR DISC BRAKE CAL-
IPER ASSEMBLIES ARE UNIQUE TO THE
CALIPER THEY ARE USED IN. THE DIMEN-
SIONS OF THESE PISTONS ARE DIFFERENT,
DO NOT INTERCHANGE THE CALIPER PIS-
TONS. IMPROPER USE COULD CAUSE A
COMPLETE FAILURE OF THE BRAKE SYS-
TEM.
The double pin Kelsey-Hayes Family Calipers,
used on the L.H. platform are mounted directly to
the steering knuckles and use no adapter. The cali-
per is mounted to the steering knuckle using bush-
ings, sleeves and 2 through bolts which thread
directly into bosses on the steering knuckle (Fig. 2).
Two machined abutments on the steering knuckle,

FRONT DISC BRAKES

INDEX
page
Shoe and Lining Wear
(Fig. 2) position and align the caliper fore and aft.
The guide pin bolts, sleeves and bushings control the
float, side to side movement of the caliper. The piston
seal, is designed to pull the piston back into the bore
of the caliper when the brake pedal is released. This
will help in maintaining proper brake shoe to rotor
clearance (Fig. 4).
Vehicles equipped with the Kelsey-Hayes double
pin family caliper. Have anti-rattle clips attached to
the inner and outer brake shoe and lining assemblies
(Fig. 1).
All of the braking force is taken up directly by the
steering knuckle of the vehicle.
The caliper is a one piece casting with the inboard
side containing a single piston cylinder bore.
The front disc brake caliper phenolic piston is 60
mm (2.36 inch) in diameter.
A square cut rubber piston seal is located in a ma-
chined groove in the cylinder bore. This provides a
hydraulic seal between the piston and the cylinder
wall (Fig. 4).
A molded rubber dust boot installed in a groove in
the cylinder bore and piston, keeps contamination
from the cylinder wall and piston.
Fig. 1 Front Disc Brake Assembly
BRAKES 5 - 27
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