Air brake and air line repair on I-57 in southern Illinois
The low-air buzzer is not something to push through to the next town. Inspectors at the scales near Marion look hard at brakes and air, and defects there park a lot of trucks.
On I-57 the downgrades through the Shawnee Hills between Anna and the I-24 junction make good brake adjustment matter. Brakes that are out of adjustment can still feel normal on flat ground around Benton and then fade on a grade.
Air work that fits in a parking lot
- Rubbed-through hoses and weeping fittings
- Worn gladhand rubbers
- Leaking service or spring brake chambers
- Slacks that need adjusting or replacing
- Sticking relay or quick-release valves
- Dryer, governor or compressor trouble
Fixing it to inspection standards
The CVSA out-of-service criteria spell out how far a pushrod can travel and how much air a system can lose. A repair done to those numbers keeps the truck from being parked at the next inspection.
Where to stop
If pressure is holding well enough to move, the Trail of Tears rest areas near mile 32 southbound, Marion Truck Plaza, or the Rend Lake rest areas near miles 74 and 79 give a mechanic room to get under the trailer.
Common questions
Is a slow leak safe to drive on?
Only if pressure builds and holds within normal limits. If the warning keeps coming on, stop and call.