Peterbilt 587 Air Springs & Level Valves

Frequently Asked Questions About Peterbilt 587 Air Springs & Level Valves

What do air springs and level valves do on my Peterbilt 587?

Air springs (also called air bags) support the weight of the cab or chassis and absorb road vibration for a smoother ride, while the level valve automatically adjusts air pressure in the springs to keep the vehicle riding at the correct height as load conditions change. Together, these components work to maintain ride quality, stability, and proper suspension geometry.

How do I know if my air spring or level valve needs to be replaced?

Common warning signs include a sagging cab or chassis, uneven ride height side to side, excessive bouncing or harshness over bumps, visible cracking or bulging in the air spring bellows, or audible air leaks near the suspension components. If you notice the truck sitting lower on one side or the ride height changes unexpectedly, the level valve linkage or valve itself may be worn or misadjusted.

Will these air springs and level valves fit my Peterbilt 587 without modification?

Products listed in this category are selected to match Peterbilt 587 applications, but exact fit can depend on your truck's build date, cab suspension configuration, and axle setup. Always check the part number, dimensions, and OEM cross-reference listed on the product page against your existing component before ordering to confirm a proper fit.

Can I replace an air spring or level valve myself, or should a professional handle it?

Many experienced technicians and fleet maintenance shops replace air springs and level valves as part of routine suspension service, and the job typically involves releasing air pressure, disconnecting linkage or air lines, and swapping the component using basic hand tools. However, because correct level valve adjustment and air system pressure directly affect ride height and handling, we recommend having the work done or double-checked by a qualified technician if you are unfamiliar with truck air suspension systems.

How long do air springs and level valves typically last, and how should I maintain them?

Service life varies based on mileage, load conditions, and exposure to road debris or extreme temperatures, but air springs commonly last several years under normal fleet use before rubber bellows show wear. Routine visual inspections for cracking, leaks, or loose linkage, along with keeping the level valve arm and connections free of corrosion and debris, will help extend the life of both components and catch problems early.