Freightliner Cascadia 113/125 Air Spring-Level

Frequently Asked Questions About Freightliner Cascadia 113/125 Air Springs & Level Valves

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

Air springs (also called air bags) support the weight of the cab or chassis and absorb road vibration as part of the suspension system, while the leveling valve regulates airflow into the springs to keep the ride height consistent as load and terrain change. Together they help maintain a stable, controlled ride and reduce strain on the frame and cab mounts.

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

Common signs include a cab or axle that sags on one side, a rough or bouncy ride, visible cracks or bulges in the air spring rubber, audible air leaks near the suspension, or the truck settling slowly overnight due to a stuck or misadjusted leveling valve. If ride height is uneven side to side, the leveling valve linkage is often the first thing to check.

Will this air spring or level valve fit my specific Cascadia model and year?

Freightliner made changes to cab and chassis suspension components across different Cascadia 113 and 125 production years, so fitment can vary by year, cab configuration, and whether the part is for the cab air suspension or axle suspension. Always confirm the OEM part number on your current component or consult your truck's parts manual before ordering to ensure an exact match.

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

Many owner-operators and shop technicians replace these parts themselves since the job typically involves supporting the cab or axle, releasing air pressure, disconnecting the linkage or air lines, and swapping the component. That said, working around a raised cab or pressurized air system carries real risk, so if you are not comfortable with the process or don't have the right jack stands and safety equipment, having a qualified technician handle it is a safer choice.

Are these replacement parts OEM or aftermarket, and does that affect quality?

Our listings include both OEM and quality aftermarket options, and we note the brand and part number for each so you can compare directly against your original equipment. Aftermarket air springs and valves from reputable manufacturers are generally built to match OEM specs and performance, but if you want a guaranteed exact match to factory equipment, choosing the OEM Freightliner part is the safer bet.