Front Disc Brakes; General Information - DaimlerChrysler LH New Yorker 1994 Electronic Service Manual

5 - 28 BRAKES

General Information

. . . . . . . . . . . . . . . . . . . . . . . 28
Service Precautions . . . . . . . . . . . . . . . . . . . . . . . 30
GENERAL INFORMATION
The single piston, floating caliper disc brake assem-
bly (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 CALIPER ASSEM-
BLIES ARE UNIQUE TO THE CALIPER THEY ARE
USED IN. THE DIMENSIONS OF THESE PISTONS
ARE DIFFERENT, DO NOT INTERCHANGE THE
CALIPER PISTONS. IMPROPER USE COULD CAUSE
A COMPLETE FAILURE OF THE BRAKE SYSTEM.
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 caliper is
mounted to the steering knuckle using bushings,
sleeves and 2 through bolts which thread directly into
bosses on the steering knuckle (Fig. 2).

FRONT DISC BRAKES

INDEX
page
Shoe and Lining Wear
Two machined abutments on the steering knuckle,
(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
machined groove in the cylinder bore. This provides a
hydraulic seal between the piston and the cylinder
wall (Fig. 4).
Fig. 1 Front Disc Brake Assembly
. . . . . . . . . . . . . . . . . . . . . 29
page