How Does Brake Fluid Work?Ī brake cannot function without brake fluid. A checked and maintained braking system provides necessary safety when driving. If the knowledge and tools are not available, this task belongs in a specialist garage. You should bleed the brake system completely to replace the brake fluid. Simply refilling is not the correct measure in this case. The leak must be found and repaired before the car is allowed back on the road. If you notice a loss, you must check the entire braking system. In a functioning system, the amount of oil does not change. In addition to the brake fluid’s water content, you should also monitor the oil level. The best time to check the brake fluid is at the beginning and end of the winter season - then, it’s very easy to combine the check with a tire change. Thankfully, the suitable equipment is commercially available.
Clarity about the condition of your brake fluid can only be provided via a test. Even if brake fluid still looks impeccable, its water content may have rendered it useless. If the oil has already aged, the color changes from bright brown to cloudy green, meaning the dilution is already far advanced. The water content is essential for the quality of the brake fluid.
What to Pay Attention to With Brake Fluid Water content However, unlike liquids, gasses can be compressed, causing the brake pressure to suddenly drop. The high temperatures in the brake system bring the dissolved water to a boil, which changes from liquid to gaseous form. The water content rising above a specific value can be fatal for the brakes. Unfortunately, brake fluid is hygroscopic, so just like salt or sugar, it attracts water. That is why no water is used for the braking systems. Brake oil must reliably transmit the force at high temperatures, which can occur during braking at the wheel brake cylinder. However, the braking system’s most significant wear and tear occur on the brake linings and the discs or the disc drum’s place.īrake fluid can also become unusable over time. Brake fluid is slightly acidic and therefore eats away at rubber seals and pistons over time. The gaskets in master and wheel brake cylinders can also suffer. The brake fluid then leaks out, and its power no longer transfers to the braking system.
Brake lines are made of copper and will rust if left unprotected sooner or later. The brake lines and gaskets in the braking system can cause problems in cars of a certain age. Your car can lose braking power in two ways: damage to the brake system or aging of the brake fluid. When it fails its task, this has dramatic consequences for the car’s safety. Brake fluid is essential in the power transmission system.
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