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 ...

From the September 2002 issue. Adding anti-lock brakes to trailers has brought many benefits over the years — safer stopping in general, increased stability in hard braking or on slippery surfaces, ...

We’ve shown how you can get your hydraulic trailer brakes up to stratch, but if you want ultimate stopping power you should consider updrading to air. Why air? Installation: part 1 Installation: part ...

Hydraulic-over-air relay valves are designed to convert hydraulic-modulated input pressure to a proportional output air pressure. The valves are suited for on and off-highway applications, including ...

Familiar red and yellow valves are clumsy to operate and sometimes allow vehicle runaways. Photos: Bendix Commercial Vehicle Systems. As much as I enjoy driving tractor-trailers, one thing that has ...

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, ...