Air brakes are one of the most crucial—and most commonly failed—sections of the CDL exam. Learning their components, safety checks, and braking techniques can make the difference between passing and ...

The trucks used for this test were off-the-shelf Freightliner Cascadias with the company’s standard brake offerings. There was nothing special about the brakes used in the test. Due to the transfer of ...

New air brake leak finder technology is helping fleet operators increase uptime. The tool uses DOT standards to indicate in one minute – with a simple green-red, pass-fail - whether the tractor or ...

It’s impossible to fix something without understanding how it’s supposed to work. Brake system repair decisions can be difficult to make, and costly to execute, without a basic understanding of system ...

" Since a 13-liter diesel engine with 40 tons in tow will never match the get-up-and-go of a Porsche 911 GT3, we G-force junkies have to get our fix with air disc brakes." Equipment Editor Jim Park ...

When the brakes are applied, circuits send compressed air from the storage tanks to front and rear service chambers that push the brake shoes into the brake drums, thus slowing down the vehicle. Semis ...

Many of the larger vehicles on our roads have one intriguing thing in common: They can make sudden, loud, gas-escaping hissing noises. These noises, admittedly, have made this writer jump — on more ...