What's the reason for a significant decrease in brake fluid without any leakage?

2 Answers
SanMaci
09/03/25 6:58am
The reason for a significant decrease in brake fluid without any leakage is due to high pressure in the new pump. Introduction to Brakes: Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other means of transport, or machinery. The general principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force. The braking device, also known as a decelerator, is a mechanical braking device that can slow down the speed. Classification of Brakes: Drum brakes, advantages of drum brakes, disadvantages of drum brakes, disc brakes, etc.
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VonCamila
09/15/25 8:20am
I've been driving for over thirty years and often encountered situations where the brake fluid inexplicably decreases. Actually, this is quite common, and the reason is mostly due to worn brake pads. When we press the brakes, the brake pads gradually wear thin, causing the pistons in the brake calipers to extend further, occupying more space, which naturally lowers the fluid level. Another possibility is air in the system, such as not fully bleeding the air after the last fluid change or small bubbles accumulating in the lines. I've also experienced slight evaporation of the fluid under a poorly sealed cap due to the car's jolting. If the decrease is significant, it's necessary to check the thickness of the brake pads; if they're too thin, replace them immediately—don't skimp on this expense. Safe driving is paramount; if braking effectiveness diminishes, it's easy to have an accident on the highway. Therefore, I recommend regular inspections at a repair shop, especially during seasonal changes.
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