Air Leaks and Brake Work, Fixed Where You Sit

Air problems are the most quietly dangerous thing on a truck, because the system is designed to fail toward the parking brake. That is a good design and a terrible way to find out about a leak, since it usually happens in the worst possible place.

Finding a leak is a trade skill. Pressure drop rates, a soap bottle, an ear and a sequence of isolating the supply, service and parking circuits will locate a leak in minutes where guesswork spends an afternoon. Rig Doctor carries air hose, fittings and governors on the truck, which several customers have specifically noted, because a leak found and not fixed is not a repair.

Brake work on the roadside covers slack adjusters out of stroke, chambers that will not hold, dragging shoes, frozen valves and lines chafed through against a frame rail or a spring. These are exactly the items an inspector checks, and they are exactly the items that put a unit out of service when they are ignored.

If the repair is beyond the shoulder, you hear that before the clock runs up. Some brake work belongs on a level surface with the wheels chocked and the right tooling, and saying so is part of the job.