4720720140 Brake Master Cylinder for Toyota

4720720140 Brake Master Cylinder For Toyota as the pressure center of the hydraulic brake system, the core function of 4720720140 Brake Master Cylinder For Toyota is to convert the driver's pedal force into hydraulic energy and achieve balanced distribution of front and rear wheel braking force through a dual-chamber series structure. The master cylinder adopts a high-strength aluminum alloy casting process, and the master cylinder diameter is precisely calculated to withstand 32MPa hydraulic pressure.

The master cylinder adopts a dual-piston compensation valve structure and is equipped with fast filling valve technology to ensure hydraulic stability under special working conditions. Its sealing system uses high-temperature resistant fluororubber material, the operating temperature range covers -40℃ to 180℃, and the piston return time is strictly controlled within 1.5 seconds. The measured data shows that after 15 consecutive 100-0km/h emergency brakings, the hydraulic pressure fluctuation amplitude is less than 0.3MPa, and the friction coefficient is stable in the range of 0.38-0.42, effectively suppressing thermal decay. It is particularly noteworthy that its modular design omits the fluid reservoir, which simplifies the installation process while reducing the weight of the system. The aluminum alloy material is 28% lighter than the traditional cast iron version.

It is recommended to conduct a comprehensive inspection every 100,000 kilometers or after a full 5-year service life. If the scratch depth on the inner wall of the master cylinder exceeds 0.1mm or the piston stroke exceeds 3mm, the assembly needs to be replaced directly. The two-stage pressure evacuation method must be used during installation, with DOT4 standard brake fluid, and pay attention to the torque value of the oil pipe interface to ensure that there are no bubbles remaining in the hydraulic system.