Master Cylinder: Disassembly
- Clean outside of cylinder thoroughly and remove cover. Drain fluid, and turning cylinder over, pump piston to remove any remaining fluid. On Jeep Cherokee, Wagoneer and truck models, remove reservoir with a pry bar. Remove reservoir grommets, retaining ring and quick-take-up valve.
- On manual brake models, remove boot from cylinder to uncover push rod retainer. Pry up retainer tab to release retainer. On all models, push piston down into cylinder bore. Remove secondary piston stop bolt from front fluid reservoir (if equipped). Remove snap ring from groove in cylinder bore.
- Remove both piston assemblies. Remove any internal parts remaining in bore. On Jeep "CJ" and Scrambler models, remove push rod from primary piston. Remove and discard all rubber parts from piston assemblies. On General Motors and Jeep "CJ" and Scrambler models, enlarge holes in tube seats using a 13/16" drill.
- Place a large flat washer over outlets and thread a 1/4" x 20 x 3/8" screw into seat. Remove seat, screw and washer. On all other Jeep models, thread a 6 x 32 x 5/8" self tapping screw into tube seat, and push upward with 2 screwdrivers to remove seat.
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