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.

A good digital multimeter (DMM) is key to diagnosing compressor problems in general. For instance, in a previous article (May 15 issue of The NEWS) we discussed using the DMM to read suction and ...

Any compressor that gets too hot or is overheated is subject to premature wear between its internal moving parts. Metal-to-metal contact between dynamic mating parts within the compressor will lead to ...