At the heart of a commercial vehicle’s air brake system is its air compressor, which pressurizes air in the primary and secondary tanks to provide power for the air brakes and other pneumatic systems.

If you haven’t changed rear brake pads on a newer car recently, you might be surprised to find it can’t be done without special tools. It’s been probably 30 years since I replaced rear pads on a car, ...

Years ago, it was common for shops to have a central power source that drove all the tools through a system of belts, wheels and driveshafts. The power was routed around the work space by mechanical ...