Reasons for Brake Master Cylinder Damage?
2 Answers
Reasons for brake master cylinder damage are as follows: 1. Dirty oil quality, leading to brake pipe blockage, causing excessive pressure in the master cylinder. Over time, braking becomes ineffective, and the oil pump is prone to damage. 2. Low oil quality or prolonged deterioration, making it easy to corrode the sealing rubber cup inside the master cylinder. Over time, this results in poor sealing, inability to retain oil, and loss of oil pressure. 3. Frequent lack of oil or dry grinding can cause wear on the rubber cup. 4. Frequent use of brakes can also be detrimental to the braking system. Here is more information about the brake master cylinder: 1. The brake master cylinder, also known as the "brake main cylinder" or "brake master cylinder," is a key component of the vehicle's braking system. 2. Depending on the vehicle type, it is divided into two types: air brake master cylinder and oil brake master cylinder. Generally, passenger vehicles such as cars and minivans mostly use oil brake master cylinders. 3. Commercial vehicles like trucks and tractors usually use air brake master cylinders.
As an experienced auto mechanic, I've seen this situation countless times. The most common issue with a damaged brake master cylinder is the aging of the piston seal rings. Rubber components harden and crack after a few years of use - one hard brake application and all the fluid leaks out, leaving the pedal feeling spongy. Contaminated brake fluid is another culprit. Excessive water content corrodes the cylinder bore interior, with rust particles scratching up the walls. Some car owners wait until the fluid turns black like soy sauce before replacing it, by which time sludge has completely blocked the compensation port, making the brake pedal feel like stepping on cotton. The worst cases involve substandard brake fluid that can make rubber seals swell up in just six months. I remember working on a car last winter where the seal cracked at -20°C - the first morning brake application went straight to the floor. That's why timely replacement with DOT4 standard brake fluid is absolutely critical!
