Crossfire SRT-6 V6-3.2L SC VIN N (2005)
Brake Caliper: Description and Operation
DISC BRAKE CALIPERS
DESCRIPTION
The calipers are a single piston type. The calipers are free to slide laterally on the anchor, this allows continuous compensation for lining wear.
The rear disc brakes consist of fixed single piston style calipers and solid rotors. The rear caliper is mounted to the rear wheel hub. The calipers are
directly bolted to the wheel hub with mounting bolts. The disc brake rotor dust shield is mounted to the hub. The disc brake rotor has a built in drum
used for the parking brakes. The parking brake shoes are mounted to the wheel hub.
OPERATION
When the brakes are applied fluid pressure is exerted against the caliper piston (2). The fluid pressure is exerted equally and in all directions. This
means pressure exerted against the caliper piston (2) and within the caliper bores (3) will be equal.
Fluid pressure applied to the pistons is transmitted directly to the inboard brake pad. This forces the pad lining (6) against the inner surface of the disc
brake rotor. At the same time, fluid pressure within the piston bores forces the caliper to slide inward on the slide pins. This action brings the outboard
brake pad lining into contact with the outer surface of the disc brake rotor.
Fluid pressure acting simultaneously on the pistons (2) and caliper (1) to produce a strong clamping force. When sufficient force is applied, friction
will stop the rotors from turning and bring the vehicle to a stop.
Application and release of the brake pedal generates only a very slight movement of the caliper (1) and piston (2). Upon release of the pedal, the
caliper and pistons return to a rest position. The brake pads (5 and 6) do not retract an appreciable distance from the rotor. In fact, clearance is usually
at, or close to zero. The reasons for this are to keep road debris from getting between the rotor and pad, and to wipe the rotor surface during each
revolution of the wheel.
The caliper piston seals (5) control the amount of piston (1) extension needed to compensate for normal lining wear.
During brake application the seals (6) are deflected outward by fluid pressure and piston (1) movement. When the brakes (and fluid pressure) are
released, the seals (3) relax and retract the piston (1).
The front outboard brake pads have electronic wear indicators. Which, when wear is present the wear indicator will illuminate a MIL light on the
instrument panel telling the operator of the brake pad wear concern.
