This component is a pneumatic system used in Peterbilt 379 model trucks to control the raising and lowering of the vehicle’s windows. It employs compressed air, typically sourced from the truck’s onboard air system, to power a mechanism that actuates the window’s movement. This system offers an alternative to manual or electric window regulators.
The integration of an air-powered regulator provides enhanced durability and reliability, particularly in demanding environments where heavy use is common. Its robust design minimizes wear and tear, contributing to reduced maintenance requirements and downtime for the vehicle. The utilization of compressed air offers consistent operational force, ensuring smooth and controlled window movement. Historically, these systems were favored for their simplicity and resilience in older heavy-duty truck models.