Frequently Asked Questions About International IH Cabover Air Springs & Level Valves

What year models of International IH Cabovers are these air springs compatible with?

Our air springs and level valves are designed to fit International IH Cabover models from 1970 through 1997, including popular series like the CO Loadstar, Transtar, and 9670. The most common applications are for the CO-1910B, CO-1950B, CO-4070B, and 9670 models. Always verify your specific model number and year before ordering, as mounting configurations can vary between early and late production runs.

How difficult is it to install these air springs, and what tools do I need?

Installation typically takes 2-4 hours per side for someone with moderate mechanical experience. You'll need basic hand tools including wrenches (typically 3/4" and 7/8"), a floor jack, jack stands, and an air compressor for testing. The most challenging part is often removing the old, corroded mounting hardware. We recommend having penetrating oil on hand and possibly a torch for stubborn bolts. Professional installation usually runs $200-400 if you prefer not to do it yourself.

What's the difference between single and dual convoluted air springs for my application?

Single convoluted air springs provide a firmer ride and are typically rated for 2,500-3,500 lbs per spring, making them ideal for lighter cab configurations or day cabs. Dual convoluted springs offer more travel and a smoother ride, with ratings up to 5,000 lbs per spring, better suited for sleeper cabs or heavier front-end loads. Most CO-4070B and 9670 models originally came with dual convoluted springs, while lighter Loadstar models often used single convoluted designs.

How long do these air springs typically last, and what are signs they need replacement?

Quality air springs generally last 5-8 years or 300,000-500,000 miles under normal operating conditions. Common signs of failure include visible dry rot or cracks in the rubber, air leaks (cab dropping overnight), uneven cab height side-to-side, or excessive bouncing. If your cab drops more than 1 inch overnight or you're adding air more than once a week, it's time for replacement. Regular inspection during oil changes can catch problems early.

Do I need to replace the level valves when installing new air springs?

While not always necessary, we recommend replacing level valves if they're over 10 years old or showing signs of wear such as slow response, sticking, or air leaks. A faulty level valve can cause premature air spring failure by over-inflating or allowing the cab to bottom out. New valves cost between $75-150 and add minimal time to the installation. If your current valves are less than 5 years old and responding properly, they can typically be reused.