Sterling Acterra Truck Air Springs & Level Valves

Frequently Asked Questions About Sterling Acterra Truck Air Springs & Level Valves

What do air springs and level valves actually do on my Sterling Acterra?

Air springs (also called air bags) support the weight of the cab or rear suspension and absorb road shock, while the level valve automatically adjusts air pressure in the springs to keep the truck riding level as load and road conditions change. Together, these components help maintain ride height, stability, and driver comfort.

How do I know if my air spring or level valve is failing?

Common warning signs include one side of the truck sitting lower than the other, a sagging cab, excessive bouncing or harsh ride quality, visible cracks or bulges in the air spring rubber, or a hissing sound coming from the suspension area that indicates an air leak. If the level valve linkage is bent, disconnected, or seized, the suspension may fail to self-adjust even when the compressor and air lines are working properly.

Will these parts fit my specific Sterling Acterra model and year?

Air springs and level valves can vary by cab suspension type, axle configuration, and model year, so it is important to confirm fitment using your truck's VIN or existing part number before ordering. If you are unsure which air spring or level valve your Acterra uses, our team can help you cross-reference the correct part to avoid ordering the wrong component.

Can I install a new air spring or level valve myself?

Many drivers and shop technicians replace air springs and level valves with basic hand tools, but the job does require releasing air pressure from the system safely, removing the old component, and properly reconnecting air lines and linkage arms. If the level valve arm is not adjusted to the correct length and angle after installation, the suspension may sit too high, too low, or fail to level properly, so careful attention to the linkage setup is important.

How long do air springs and level valves typically last, and should I replace them in pairs?

Service life depends on mileage, load conditions, and exposure to road debris and weather, since rubber air springs naturally degrade over time even under normal use. If one air spring on an axle has failed or shows significant wear, many technicians recommend replacing both sides at the same time to maintain even ride height and consistent suspension performance.