20779171
Pressure Switch
Volvo

A pressure switch monitors a defined pneumatic or hydraulic pressure threshold to trigger alarms, control relays, or regulate system operation. In Volvo trucks, these switches are integral to brake control circuits, air suspension systems, or hydraulic actuators, providing a precise on/off signal when pressure crosses the preset limit. The switch housing is built to resist contamination, with seals designed to keep moisture and dust out of the sensing element. Correct mounting position and thread engagement are critical for accurate readings and reliable response, while electrical connections must be solid and corrosion-free to prevent false signals. The selected switch should match the OEM pressure range, response time, and electrical rating to ensure predictable, repeatable performance under varying load and temperature conditions. Frequent inspection for leaks around the threaded port and electrical connector integrity helps sustain braking safety and system reliability. Source One Parts Center recommends confirming it aligns with the truck’s service manual specifications.