We hear it all the time from drivers dropping trailers off at the shop: “It’s just a small hiss, nothing major.”
In the world of commercial fleet maintenance, a minor air leak is never just a minor air leak. Your trailer’s air system controls your brakes and your air-ride suspension. Treating an air leak as an annoyance rather than a hazard is a massive gamble that almost always ends up costing you money.
The Hidden Costs of Air Leaks
When a trailer is leaking air, the tractor’s air compressor has to work overtime to keep the tanks full. This constant cycling puts massive strain on the compressor, eventually leading to premature failure (which is an incredibly expensive fix).
More importantly, an air leak directly impacts your braking power. If your system can’t maintain proper pressure, your stopping distance increases. If the pressure drops too low, the spring brakes will automatically engage, locking up your trailer tires in the middle of the road.
What to Look and Listen For
The best way to catch air leaks is a quiet walk-around after the brakes have been applied. Listen closely near the gladhands, the air tanks, and the brake chambers. If you hear hissing, or if you notice your air gauges dropping rapidly after you shut the truck off, it’s time for a repair. We stock every valve, brass fitting, and air line imaginable to fix these issues fast so you don’t end up with an out-of-service DOT violation.