Chevrolet Sonic Repair Manual: Hydraulic Brake System Description and Operation
System Component Description
The hydraulic brake system consists of the following:Hydraulic Brake Master Cylinder Reservoir
Contains a supply of brake fluid for the hydraulic brake system.Hydraulic Brake Master Cylinder
Converts mechanical input force into hydraulic output pressure.
Hydraulic output pressure is distributed from the master cylinder through two hydraulic circuits, supplying diagonally-opposed wheel apply circuits.Hydraulic Brake Pressure Balance Control System
Regulates brake fluid pressure delivered to hydraulic brake wheel circuits, in order to control the distribution of braking force. Pressure balance control on non-ABS equipped vehicles, is achieved through a proportioning valve assembly. Pressure balance control on ABS equipped vehicles, is achieved through electronic brake distribution (EBD), which is a function of the ABS modulator.Hydraulic Brake Pipes and Flexible Brake Hoses
Carries brake fluid to and from hydraulic brake system components.Hydraulic Brake Wheel Apply Components
Converts hydraulic input pressure into mechanical output force.System Operation
Mechanical force is converted into hydraulic pressure by the master cylinder, regulated to meet braking system demands by the pressure balance control system, and delivered to the hydraulic brake wheel circuits by the pipes and flexible hoses. The wheel apply components then convert the hydraulic pressure back into mechanical force which presses brake linings against rotating brake system components.
Fuel Tank Heat Shield Replacement
Removal Procedure Support the fuel tank with a suitable jack. Remove the fuel tank strap fasteners (1) and lower the fuel tank straps (2). Remove the fuel tank heat shield fasteners (1) and remove the fuel tank heat shield (2).