20791291
Pressure Switch
Mack

This pressure switch is a precision sensor designed to monitor a critical hydraulic or air system pressure and actuate electrical circuits at a defined threshold. Built for rugged heavy-duty service, it delivers reliable on-off signaling to control valves, actuators, or warning indicators, helping prevent over-pressurization and protecting components from damage. The device is engineered with durable contact materials and a sealed housing to resist oil, dust, and vibration common in truck environments. Its setpoint and hysteresis characteristics are tuned to deliver consistent responses across a wide temperature range, so operators experience predictable brake or pneumatic behavior even on rough roads. When pressure moves past the configured point, the switch can energize a solenoid, illuminate an alert, or feed data to a diagnostic module for real-time monitoring. For maintenance, it’s designed for straightforward replacement with standard fittings and no special tooling. Proper installation ensures a tight seal to minimize leakage and maintain accurate readings over time. Source One Parts Center.