Cleaning & Inspection

Clean all parts with denatured alcohol or brake fluid, and flush residue out of housing. Check bore in housing and piston for score marks and rust.
Small rust spots in housing may be removed with polishing cloth. Scored or badly rusted parts cannot be repaired, replace complete master cylinder.
On tandem models, standard master cylinder inside diameter is .937" (23.81 mm). Maximum bore wear limit is .941" (23.92 mm).
On stepped tandem models, standard master cylinder I.D. for push rod circuit is .937" (23.81) and I.D. for floating circuit is .750" (19.05 mm).
Maximum master cylinder bore I.D. is .941" (23.92 mm) for push rod circuit and .754" (19.16 mm) for floating circuit.