function and maintenance of brake seals

Brake seals are critical components ensuring the safe operation of automotive braking systems. Their functions include preventing brake fluid leakage, maintaining stable system pressure, and automatically adjusting brake clearance. The following outlines key information regarding brake seals:
 I. Function and Risks of Seals Seals contain brake fluid, preventing leakage that could cause brake failure.
Enable piston retraction and automatic clearance adjustment (maintaining standard clearance even after wear) through elastic deformation of rectangular rubber seals. Support piston guidance to prevent direct friction damage between caliper body and piston. Failure Symptoms Seal ageing or damage may cause soft brake pedal feel and increased stopping distance. Substandard brake fluid or mixed grades may corrode seals, leading to swelling and seizure.
II. Maintenance and Replacement Recommendations Regular Inspection Inspect the seal for leaks during each service interval, concurrently replacing brake fluid (recommended every 2 years or 40,000 kilometres). Immediate inspection is required if abnormal brake fluid level drops or warning lights activate. Replacement Guidelines Use only genuine manufacturer components to prevent safety hazards from inferior seals. Clean interfaces before installation to avoid debris scratching new seals.
Handle with care during operation to prevent seal damage from forced installation.
III.Technical Principles Within disc brakes, rectangular rubber seals undergo slight deformation during braking due to piston friction. Upon brake release, they return elastically while maintaining approximately 0.1mm clearance to prevent drag. Advanced composite seal structures (e.g., Dongguang Aowei patented design) further enhance seal longevity and safety.