GM 18013417 Cylinder Asm,Brake Master

Only Heavy Duty Brake Fluid meeting DOT 3 or 4 specifications should be used.

Replace the old seals with new ones, lubricate the bore with brake fluid, and reassemble the primary piston assembly. Disassemble and install new O-rings and retainers for the switch piston assembly before putting it back into the cylinder. Install new O-rings on the proportioner valves and the failure warning switch, and insert the quick take-up valve into the cylinder body with its retaining ring. Press new reservoir grommets into the cylinder body, place the reservoir top down on a flat surface, and press the cylinder body onto it with a rocking motion.

Purchasing a master cylinder overhaul kit is important as it includes all the necessary replacement parts, particularly the rubber seals, to ensure proper fluid control within the master cylinder during the rebuild procedure.

Start by removing the hydraulic lines at the master cylinder, collecting any fluid spillage with dry cloths, and plugging the ends of the hydraulic lines to prevent fluid loss or dirt from entering the system.

During the rebuild procedure, it is essential to avoid allowing grease or mineral-based solvents to contact the rubber parts. To protect painted surfaces from brake fluid spills, cover the front fender and cowling area of the car.