Master Cylinders - BENDIX & DELCO-Moraine Dual Piston Master Cylinder: Overhaul: Disassembly: Notes
- With master cylinder in vise, remove reservoir cover and diaphragm type gasket. Depress piston and remove stop screw.
- Remove lock ring from groove in end of bore, or piston retainer and screw, if used, and remove rear (primary) piston assembly.CAUTION: Do not disassemble rear piston assembly or disturb adjustment of screw.
- Front (secondary) piston may be removed with air pressure through compensating port in reservoir, or by pulling with wire hook or mechanical finger through end of cylinder. Remove front piston spring if it did not come out with piston. Remove splash seal and retainer from outside rear of cylinder, if used.
- To gain access to check valves, remove tube seats in cylinder outlets. Use self-tapping removal kit if supplied in repair kit, or use one of the following methods: Thread a short screw into seat and pry screw and seat out with a screwdriver. Another method is to drill a 13/64" hole through each seat. Then, tap hole with a 1/4-20 tap. Screw a tubing nut into out-let, then insert a 1/4-20 machine screw (with washer) through nut and into tube seat. Hold screw from turning and unscrew the tubing nut to remove seat. Remove check valve and spring from drum brake outlet.NOTE: Ford does not recommend tube seat removal.