Typical, medium-duty, hydraulic brake system with front discs (red circuit) and rear drums (green circuit). Boost, or assist (blue circuit), is provided by an engine-driven pump, although the power ...

The emergency and supply lines that stretch between a tractor and trailer offer a colorful reminder that compressed air is the lifeblood of your brake system. The hoses are a respective red and blue, ...

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 ...

The air-brake system has three sections: the supply portion, the parking brake and the service brakes. The parking brake system has air pressure inside only when the parking brakes are released, while ...

Fleetwood Resource Management (FRM) introduced its Air Brake Cooling(ABC) System, a fade-resistant system which, according to the company, “virtually eliminates” one of the biggest problems facing ...

If you hear the compressor cycling while sitting in traffic with a constant brake pressure or when idling with parking brakes applied, or if you lose all pressure overnight with the engine off, the ...