At IC Bus we use high-grade bolts to hold our chassis frames together, and we laser-align our frame rails and require a detailed sign-off process. For over 100 years, we’ve been making chassis that help produce exceptional fuel economy and less tire wear, and that are safer for passengers.
The chassis is the foundation of any vehicle, and its assembly is conducted with the best parts, people and safeguards built in to ensure that it performs at the safest and highest level possible.
At IC Bus, we’ve been building bus chassis since 1905. For over 100 years we provided chassis for 50% of the market, until we decided to create our own, fully integrated product. That means our customers get the benefit of a chassis that has been developed over a century and has stood the test of time.
Wheels arrive at IC Bus’ Tulsa plant pre-balanced and in matched sets of four, while the axles are delivered pre-aligned and are placed in fixtures where the springs are added. This assures that the springs are parallel and the entire assembly is squared to .015 of an inch.
The tires and rims are installed by DynaTorque DC Nutrunners that measure torque in steps, ensuring that they are installed accurately.
The critical frame rails, which provide strategic support for the steel understructure, are mirror-imaged and laser-aligned; they arrive pre-punched, leaving no margin for error or miscalculation on the line. In addition, IC Bus is the only company to apply paint to the outside of the chassis as a standard practice to provide added protection to the powder-coated rails and understructure.
The cross members that hold the frames are linked and secured with Grade 8 bolts made from high-tensile steel that can be torqued to a higher value than lower-grade fasteners. Another IC assembly precision innovation is the frame-square fixture, which allows fasteners and frames to be squared to within .060 of an inch.
Each safeguard and innovation ensures that the chassis runs true, so that our customers experience better fuel economy and less tire wear as well as a product that remains safe and reliable throughout its life.