Heavy-Duty Truck Repair for Semis, Trailers & Box Trucks

What Is Heavy-Duty Truck Repair?

Heavy-duty truck repair is the diagnosis and repair of large commercial trucks, from Class 7 straight trucks to Class 8 semi tractors. It covers the diesel engine, the air brake system, the suspension, the drivetrain, the cooling system and the electrical system. These trucks carry far more weight than a pickup, so every part is built bigger and wears in its own way.

The work starts with finding the real cause of a problem, not just the part that failed last. Our technicians read fault codes, inspect the truck and test the system before anything is replaced. Then we repair or replace what is worn and test the truck again so it leaves ready to run.

Why Heavy-Duty Truck Repair Matters in Mercer, PA

Trucks around Mercer spend their days on I-79 and I-80, which meet in Mercer County, and on US 62 and US 19 through town. Long interstate miles wear brakes, wheel ends and drivelines, and the climbs of the Allegheny Plateau work engines and cooling systems hard. A small fault that goes unchecked on those roads can turn into a breakdown on the shoulder.

Winters here are cold, with January averaging about 25 degrees in Mercer, and road salt goes after air lines, wiring and brake parts. A truck that sits down costs a driver or a fleet money for every load it misses. Repairing a problem early keeps the truck safe, legal and earning.

When to Consider Heavy-Duty Truck Repair in Mercer, PA

Call for a repair as soon as the truck changes how it drives, sounds or stops. A new warning light, a drop in power or a change in the brakes is the truck telling you something. Waiting usually makes the repair bigger, because one worn part puts strain on the parts around it.

The best times to have a truck looked over are before winter, before a long haul and after any hard hit to a wheel or the frame. Trucks that run high miles every week need repairs more often than ones that run local. If you are not sure whether a problem can wait, call (330) 503-1372 and ask.

Signs You Need Heavy-Duty Truck Repair

Watch for these signs that your truck needs attention:

How Our Heavy-Duty Truck Repair Works

Getting your truck repaired takes four steps:

• Step 1: Call (330) 503-1372 or request a quote, and tell us what the truck is doing.
• Step 2: Bring the truck to our Mercer shop, or we come to you, for a free estimate.
• Step 3: We explain what we found and what it will take before any work starts.
• Step 4: Once you approve, we do the work and get you back on the road.

Engine and Cooling System Repair

The diesel engine is the heart of a heavy truck, and its cooling system keeps it alive. We repair leaks, turbochargers, injectors, water pumps, radiators and the hoses between them. For deeper engine work, our Diesel Engine Repair & Maintenance service covers rebuilds and overhauls.

Overheating is one of the fastest ways to ruin a diesel engine. A sagging coolant level, a temperature gauge that climbs on hills or white smoke from the exhaust all need checking. We find the cause and fix it before the engine pays the price.

Air Brake, Suspension and Wheel-End Repair

Air brakes stop tens of thousands of pounds, so we treat them with care. We repair air leaks, brake chambers, slack adjusters, drums, shoes and the valves that control them. We also replace worn springs, shocks, bushings and wheel bearings.

A truck that pulls, wanders or wears tires unevenly often has a suspension or wheel-end problem. These parts also show up on a DOT inspection, so fixing them keeps the truck legal. Our DOT Inspections service checks all of them in one visit.

Drivetrain and Electrical Repair

Power has to get from the engine to the wheels, and that path runs through the clutch, the transmission, the driveshaft and the axles. We repair grinding gears, slipping clutches, worn U-joints and leaking seals. Our Transmission Repair for Trucks service covers that work in depth.

Modern trucks also depend on wiring, sensors and computers to run. We trace shorts, repair harnesses and fix charging and starting problems. We carry Interstate Batteries, so a dead battery does not have to keep a truck down.

Why Mercer Customers Choose A&M Diesel Truck Repair L.L.C

Our certified technicians bring 17 years of hands-on experience with heavy trucks, and our team has repaired 3,000 vehicles. We use quality parts on every job. We honor whatever warranty the manufacturer provides for the parts we install.

When you call us, you deal directly with the owner, so you get straight answers and no runaround. Our roadside service runs 24/7 and covers 200 miles, most of Ohio and Pennsylvania. Call (330) 503-1372 or stop by 160 McKinley Ave to get your truck looked at.