Air Compressor Repair
The air compressor feeds the brakes and air accessories. When it builds pressure slowly or not at all, the truck can't operate safely.
- AvailabilityCalls and messages 24/7
- WhereRoadside, yard or jobsite
- CategoryHeavy-Duty Truck Repair
- On-site repairWhere feasible and safe
About air compressor repair.
The air compressor feeds the brakes and air accessories. When it builds pressure slowly or not at all, the truck can't operate safely.
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.
Slow air build-up
Compressor cycling constantly
Oil in the air system
Low-air warnings
What the service involves.
Checking build-up time and leakage
Inspecting the compressor, governor and drier
Looking for oil carry-over and leaks
Repairing or replacing accessible parts
Causes and good habits.
These are possibilities, not a diagnosis. The only way to know is to test the unit.
Possible causes
- Worn compressor or unloader
- Air leaks forcing constant cycling
- Governor or air dryer faults
Practical tips
- Watch air build-up time at start-up
- Drain air tanks as your maintenance plan requires
What to expect.
A truck with insufficient air pressure must not be driven. Brake safety comes first.
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.
Air Leak Repair
Air leaks reduce brake performance and force the compressor to work harder.
Brake System Repair
Brakes are the most safety-critical system on a commercial vehicle.
Air Valve Replacement
Relay valves, protection valves and other air valves control how the brakes respond.
Emergency Air Leak Repair
A major air leak can leave a truck or trailer unable to move safely.
Frequently asked questions.
Is it safe to drive with slow air build-up?
No. Do not drive a truck with low air pressure. Call for help.
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.