Step 1
Record pressure readings, warning alarms, and how quickly pressure changes
Step 2
Identify whether the sound is near the tractor, trailer, or connection
Step 3
Do not crawl beneath unsupported equipment to find a leak
Describe pressure behavior, not just the sound
Note whether pressure builds slowly, drops while parked, or changes when the brake pedal is applied. Mention which warning lamps or alarms appear and whether the trailer is connected.
Treat a brake-system leak as a safety issue
Air loss may affect the tractor, trailer, or their connection and can change braking behavior. Follow the truck's instructions and your safety procedures. Do not continue a trip if the combination may be unsafe.
Make observations from a safe position
A leak may be audible from outside the vehicle, but locating it can require access beneath the truck or trailer. Leave inspection and repair to qualified personnel using proper support and equipment.
Related repair services
Ask before you travel
Service capability, parts, mobile coverage and current availability can vary. Contact the location you prefer to discuss the specific truck and confirm the next step.
South River
South River Truck Repair Location
396 Whitehead Ave, South River, NJ 08882
+1 209-702-4047
Paterson
Paterson Truck Repair Location
253 Pennsylvania Ave, Paterson, NJ 07503
+1 973-500-3954