With Antilock Brakes

Primary And Secondary Ports Without ABS:

GENERAL INFORMATION
The Bendix ABX-4 Brake System uses a modified Master Cylinder and Power Brake Vacuum Booster assembly. The Master Cylinder primary and secondary outputs go directly to the Hydraulic Control Unit (HCU). This master cylinder is a center valve design. The master cylinder is a two outlet design. All vehicles are equipped with a master cylinder having a bore diameter of 22.2 mm.

DESIGN OF MASTER CYLINDER
The brake system master cylinder assembly consists of the following components. The body of the master cylinder is an anodized aluminum casting. It has a machined bore to accept the master cylinder piston and threaded ports with seats for hydraulic brake line connections. The brake fluid reservoir of the master cylinder assembly is made of a see through polypropylene type plastic. On ABS master cylinders, the primary outlet port supply hydraulic pressure to the right front and left rear brakes. The secondary outlet ports supply hydraulic pressure to the left front and right rear brakes.