At what pressure does the low pressure switch activate?

The low pressure switch is designed to activate at a pressure threshold that typically signals a potential issue within the braking system, alerting the driver or the technician. In many systems, the low pressure switch is set to activate when the pressure falls below 60 pounds per square inch. Activating at this pressure ensures that the system can respond promptly to low brake fluid pressure, which could indicate a leak or other dysfunction, thereby preventing brake failure and enhancing safety.

Understanding that a range of operational pressures exists within brake systems is crucial for technicians. Each system may have specific parameters depending on the manufacturer and design, making knowledge of these thresholds important in routine checks and troubleshooting. Being aware that the switch's activation point is at or below 60 psi helps technicians maintain the functionality and reliability of the braking system in school buses and other vehicles.