Buick 18060114 Cylinder Asm,Brake Master

Use only Heavy Duty Brake Fluid meeting DOT 3 or 4 specifications. Do NOT use any other fluid or severe brake system damage may result. The Brake Master Cylinder is located under the hood, in the left rear section of the engine compartment. It is divided into two sections (reservoirs) and the fluid must be kept within ¼ in. (6mm) of the top edge of both reservoirs. The level should be checked at least every 7,500 miles (12,000 km). To check the fluid level, simply pry off the retaining bail and then lift off the top cover of the Brake Master Cylinder. Be careful not to spill any brake fluid on painted surfaces, as brake fluid eats paint. Do not allow the brake fluid container or the Brake Master Cylinder reservoir to remain open any longer than necessary; brake fluid absorbs moisture from the air, reducing the effectiveness and causing corrosion in the lines. The reservoir cover on some models (1978 and later) may not have a retaining bail. If so, simply pry off the cover with your fingers.

On ABS-equipped models, don't detach the brake master cylinder and ABS unit/motor pack together. For brake master cylinder replacement, seek a dealer service department or qualified shop. To remove the brake master cylinder, disconnect the battery, unplug the fluid sensor, remove brake line fittings and mounting nuts. Discard any fluid left in the reservoir. In a vise, detach the brake master cylinder components, clean and inspect. Reassemble with new seals and lubricate the proportioner valves. Check the reservoir for damage, install new O-rings, and secure with retaining pins. Bench bleed the brake master cylinder before installation and bleed brakes at each wheel.