Brake Master Cylinder: Description and Operation

Figure 1 Exploded View Of Composite Master Cylinder:

This master cylinder assembly is an aluminum-plastic composite featuring an integral proportioning valve and warning switch. The cylinder has dual pressure chambers with a primary piston to supply hydraulic pressure to the rear brakes and a secondary piston to pressurize the front brakes. The cylinder is designed for a conventional front/rear split brake system with one outlet for both front brakes and one outlet for both rear brakes. The master cylinder has two reservoirs mounted over, and supplying fluid directly to, the primary pressure chamber and the secondary pressure chamber.