Semi air brakes rely on compressors, reservoirs, dryers, valves, brake chambers, pushrods, and S-cams to move shoes or pads ...

The Haldex one-way check pressure protection valves protect against leaks in air pressure from the braking system if an air line or valve in an air-operated accessory fails. The e-coated zinc diecast ...

Haldex Commercial Vehicle Systems’ family of pressure protection valves – used in air suspensions, air seats and cab isolation systems – standardizes three pressure settings for both a base pressure ...

The new design standardizes three pressure settings for both a base Pressure Protection Valve and a Pressure Protection Valve with a One-Way Check. The new Pressure Protection Valves feature an ...

Most incidents involving total air-brake failures go unreported officially and simply become the stuff of legend. But a few too many of them have resulted in very public collisions. Until recently, ...

Tractor and trailer air systems may be among the least proactively maintained parts of trucks. Put another way, fleets tend to ignore them until there’s a problem. There are two serious flaws with ...

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 ...

Heavy-haul freight trains require fully charged brakes. When operating a train on a downgrade, brake usage levels on individual cars climb, equipment heats up, and braking power levels can drop ...

As spring arrives across North America, it’s important to take preventive maintenance steps and address the tolls that a season of wild temperature swings and corrosive road chemicals can take on your ...

Plumbing up a trailer with air-brakes might be almost as simple as tying your laces, but it’s a different story with tractor pneumatics. While the system itself is beautifully straightforward in ...