Air Leak Repair
Air leaks reduce brake performance and force the compressor to work harder. Finding and repairing leaks in lines, fittings and valves restores system pressure.
- AvailabilityCalls and messages 24/7
- WhereRoadside, yard or jobsite
- CategoryHeavy-Duty Truck Repair
- On-site repairWhere feasible and safe
About air leak repair.
Air leaks reduce brake performance and force the compressor to work harder. Finding and repairing leaks in lines, fittings and valves restores system pressure.
A mobile mechanic can look at the unit where it stands, whether that is the roadside, a yard or a jobsite. That can avoid a tow and shorten downtime when the fault is suited to on-site work.
Part of Heavy-Duty Truck Repair.
When you might need it.
Any of these is a good reason to call and describe what the unit is doing.
Audible hissing
Pressure dropping when parked
Compressor running more than normal
Low-air warnings
What the service involves.
Pressure-drop testing
Locating leaks at lines, fittings and valves
Replacing damaged lines or components
Rechecking pressure retention
Causes and good habits.
These are possibilities, not a diagnosis. The only way to know is to test the unit.
Possible causes
- Cracked or chafed air lines
- Worn fittings and glad hands
- Failing valves or diaphragms
Practical tips
- Listen for hissing with the engine off and pressure up
- Replace damaged lines rather than patching
What to expect.
Leak severity and safety determine whether a truck may be moved. Do not drive with unsafe air pressure.
On-site repair depends on the fault, parts, vehicle condition, safety and service feasibility.
(437) 601-8551Before you call
- Exact location, and direction of travel on a highway
- Truck or trailer type, make and year if known
- What happened and what warnings you see
- Whether the unit is somewhere safe
- A number we can call back
From the first call to the fix.
Call or message
Tell us where the unit is.
Describe the fault
Symptoms, lights, noises, leaks.
Agree the plan
Feasibility and dispatch, discussed honestly.
Diagnose and repair
On site where it is possible and safe.
Services that often go together.
Trailer Air Leak Repair
Trailer air leaks drain the brake system and can lock up the spring brakes.
Air Compressor Repair
The air compressor feeds the brakes and air accessories.
Brake System Repair
Brakes are the most safety-critical system on a commercial vehicle.
Emergency Air Leak Repair
A major air leak can leave a truck or trailer unable to move safely.
Air Leak Repair by area.
Choose your community for local information.
Frequently asked questions.
Can air leaks be fixed on the road?
Many can, if the part is available and conditions are safe.
How do I request this service?
Call (437) 601-8551 or message us on WhatsApp with your location and the issue. For non-urgent work, use the contact form.
Can every repair be done on site?
No. It depends on the fault, parts, vehicle condition, safety and feasibility.
Stranded on the Road? Let's Talk.
Tell us where your truck or trailer is located and what happened. Contact Fellows to discuss mobile repair options and next steps.
(437) 601-8551Have ready: exact location, truck or trailer type, what happened or what warnings you see, whether the unit is somewhere safe, and a callback number. Timing, dispatch and on-site repair depend on location, availability, the fault, parts and safety.