Freightliner FLC112 Air Springs & Level Valves

Frequently Asked Questions About Freightliner FLC112 Air Springs & Level Valves

What do air springs and level valves actually do on my FLC112?

Air springs (also called air bags) support the weight of the cab or suspension and absorb road vibration, providing a smoother ride and reducing stress on the frame. The level valve works alongside the air springs to automatically adjust air pressure as load and ride height change, keeping the cab or axle riding at the correct height. Together, these components help maintain consistent ride quality and handling.

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

Common signs include a sagging or uneven cab or chassis height, a rougher ride than normal, visible cracking or bulging in the rubber air spring, audible air leaks near the suspension or cab mounts, or the cab not returning to its normal ride height after hitting a bump. If you notice any of these symptoms, it is a good idea to inspect the air springs and level valve for wear or damage.

Will these parts fit my specific FLC112 model year?

Air springs and level valves can vary by cab suspension design, mounting configuration, and model year, so it is important to check the part number and specifications listed on each product page against your truck's existing components before ordering. If you are unsure, having your VIN or the OEM part number from your current air spring or level valve on hand will help confirm the correct match.

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

Many experienced truck owners and shop technicians replace these components themselves, as the job typically involves releasing air pressure from the system, unbolting the old part, and mounting the new one in its place. However, because these parts affect ride height, cab stability, and overall suspension performance, proper torque specs and correct valve linkage adjustment are important. If you are not comfortable working with air suspension systems, having a qualified technician handle the installation is recommended.

Do I need to replace the level valve and air springs at the same time?

Not necessarily. If your level valve is functioning correctly and only an air spring has failed, you can typically replace just the air spring. However, if the level valve is worn, sticking, or not adjusting properly, replacing it separately can resolve ride height issues without needing new air springs. Inspecting both components individually will help you determine exactly what needs to be replaced.