Without ABS
OVERVIEWThe base brakes on a vehicle not equipped with ABS use a standard compensating port master cylinder, while vehicles equipped with ABS use a center valve design master cylinder. The information provided here applies only to the non-ABS master cylinder. For information on the master cylinder used on vehicles with ABS, refer to Antilock Brake System; Master Cylinder, ABS; Description and Operation.
The non-ABS master cylinder is a four-outlet design with two screw-in proportioning valves. One is attached directly to the inboard side of the master cylinder housing while the other is attached to the bottom. Vehicles equipped with rear drum brakes use a master cylinder with a 22.23 mm (0.875 inch) bore diameter, while vehicles equipped with rear disc brakes use a 23.82 mm (0.937 inch) bore diameter master cylinder.
The master cylinder body is an anodized aluminum casting. It has a machined bore to accept the master cylinder piston and also has threaded ports with seats for hydraulic brake line connections.
The master cylinder's primary outlet ports supply hydraulic pressure to the right front and left rear brakes while the secondary outlet ports supply hydraulic pressure to the left front and right rear brakes.
BRAKE FLUID RESERVOIR
The master cylinder has the brake fluid reservoir mounted on top of it which gravity feeds brake fluid to the master cylinder when it is required. The reservoir is made of see-through plastic and it houses the brake fluid level switch.