Master Cylinder - Grand WAGONEER: Reassembly

1. Install replacement tube seats by threading a spare brake line tube nut into hole. Turn nut in until tube seat bottoms. DO NOT  cock tube seat in hole. Remove nut and check for burrs which may have been loosened by nut. Install secondary seals on secondary piston, with cup lips facing away from each other.
2. Install primary seal, spring retainer and return spring on secondary piston. Install seal so lip faces interior of master cylinder when installed. Lubricate cylinder bore with clean brake fluid and install secondary piston assembly. Lubricate primary piston seals and install primary piston assembly in bore. Hold primary piston downward in bore and install snap ring.
3. Install composite reservoir (if equipped). On models with push-on composite fluid reservoir, invert reservoir, install grommets and press on body using a rocking motion. Install master cylinder cover and new diaphragm.
4. On vehicles with manual brakes, assemble brake pedal push rod through retainer (if equipped). Push retainer over end of master cylinder and install rubber boot.

Fig 1: Exploded View of Master Cylinder (Grand Wagoneer)

Courtesy of AMERICAN MOTORS/JEEP CORP.