TANDEM MASTER CYLINDER PISTON PROTECTION WITH CENTERING GUIDE

摘要

A master cylinder (10) for attachment with a pre-installed brake booster includes a housing (12) having a bore (14) to receive a piston (16) and piston rod (24). An outermost end of the piston rod has a guide member (30) in the shape of a funnel which centrally aligns a push rod (35) in the brake booster with a blind bore (32) in the piston rod during attachment with the booster. In addition, a sealing boot (36) is provided on the master cylinder to protect the piston rod outer sealing surface from foreign material and foreign objects that would otherwise contact the piston rod surface during shipping, storage, and installation. The sealing boot is attached at one end to the housing and at an opposite end to the guide member.