Neon L4-2.0L VIN C (1997)
Brake Caliper: Description and Operation
Front Caliper
Exploded View Of Front Caliper
Fig. 2 Piston Seal Function
GENERAL INFORMATION
The caliper is mounted to the steering knuckle using bushings, sleeves and 2 guide pin bolts which thread directly into bosses on the steering
knuckle. Two machined abutments on the steering knuckle position the caliper. The guide pin bolts, sleeves and bushings control the 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
maintains the proper brake shoe to rotor clearance.
The caliper is a one piece casting with the inboard side containing a single piston cylinder bore. The front disc brake caliper piston, is
manufactured from a phenolic compound. The outside diameter of the caliper piston is 54 mm. A square cut rubber piston seal is located in a
machined groove in the caliper cylinder bore. This provides a hydraulic seal between the piston and the cylinder wall. A rubber dust boot is
installed in the cylinder bore opening and in a groove in the piston. This prevents contamination in the bore area. As front disc brake linings wear,
master cylinder reservoir brake fluid level will drop. Fluid level should be checked after replacing linings. Front disc brakes are equipped with an
audible wear indicator on the outboard brake pad. This sensor omits a sound when the brake lining may need inspection and/or replacement.
