745-K033221
Brake Valve
Mack

This Brake Valve is a critical component of the Mack air-brake system, engineered to translate pedal input into controlled service brake pressure. The unit modulates pressure with precision to the brake actuators, delivering predictable stopping response across varied loads and road conditions. Built for heavy-duty operation, it withstands engine and ambient heat, vibration, and road contaminants that can compromise seals. Integrated seals and robust pneumatic internals help minimize leakage and maintain consistent performance between inspections. For fleet applications, the valve's reliable operation reduces pedal travel variability and brake lag, contributing to safer, more confident stopping without premature wear on drums or discs. The part is designed for straightforward replacement, with standard mounting patterns and port arrangements that align with Mack configurations, reducing downtime during maintenance. Correct installation and torque, along with compatible inlet and outlet lines, ensure your braking system remains compliant with safety standards and ABS where equipped. In short, this valve supports stable brake modulation, reduces the risk of reduced braking efficiency on long descents, and supports dependable daily operation. Source One Parts Center.