Despite the fact that airbags are used on trucks that weigh in at 80,000 pounds, there are still those who have concerns about their strength. According to airbagit.com, their bags are designed by Chassis Tech and have a burst safety margin of up to 600 psi, five times more than will ever be needed. They claim bags will never see over 200 psi—there’s no way they’ll ever blow out unless they are damaged.
While airbags can be hurt internally by moisture accumulating over the years, a more likely cause of failure is a hole worn in the bag from rubbing against something. It goes without saying that the bag must not be allowed to touch anything in operation.
Another way bags are damaged is by over-extension. Bags have a maximum length that should never be exceeded—that can be controlled by shock absorber extension, or some sort of restraint, if necessary.
Air suspension systems are usually plumbed with DOT-approved air brake line. It has proved to be extremely reliable, but again it must not be allowed to rub on sharp edges or any components that move.
Compressors are usually reliable but if they run for extended periods due to leaks in the system (or being undersized) their life span can be shortened. In addition, filters should be used on the intake ports to keep dirt out of the intake tract.
The Hot Rod Hauler System
For our system, we used an airbagit.com plug-and-play system with a ¾-hp DC7500 compressor it included electric control valves, a four-button control panel with two twin gauges and a stainless air tank. Up front are DeNominator convoluted bags, in the rear are the same bags used as overloads on the leaf springs (we’ll be showing how we redid that arrangement to lower the rear of the truck to go along with the dropped axles we installed last month). CCT