BENDIX/DELCO-Moraine Dual Piston Master Cylinder: Description

Unit is a single cylinder with front and rear pistons and a separate reservoir and outlet for each piston. Rear piston is operated by pushrod. Front piston is operated by rear piston. In a combination drum and disc system, reservoir that feeds disc brakes is larger, to correspond with large size disc brake caliper cylinders. Master cylinder outlet that feeds drum brakes has a residual pressure valve under the tub seat. Disc brake outlet has no valve because disc brakes must not have any residual pressure.

NOTE: Master cylinder used with 4-wheel drum brakes has residual pressure valves and springs in both brake line outlets.

A stopscrew, which is screwed in from outside the cylinder, limits return stroke of front piston. Some master cylinders have one outlet on bottom and other outlet on side. A bleeder screw on these master cylinder allows trapped air to be released.

NOTE: Dodge models do not have a residual valve for rear drum brakes. Cup expanders must be used on Monaco, Charger, Coronet, Challenger, and manual disc brakes on Dart models rear wheel cylinder.