Chevrolet 18013421 Cylinder Asm,Brake Master

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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.

Snap the retaining ring into place, replace the reservoir diaphragm and cover to complete the overhaul.