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Home Under The Hood Common Brake Problems in Heavy-Duty Trucks: What Drivers and Technicians Need to Know

Common Brake Problems in Heavy-Duty Trucks: What Drivers and Technicians Need to Know

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When 80,000 pounds of truck and trailer are rolling down the highway, there’s no room for error. Brakes are one of the most critical safety systems on any heavy-duty commercial vehicle—but too often, they’re also one of the most overlooked. In Canada, brake-related defects account for over 12% of out-of-service violations. So why does this keep happening, and how can we prevent it?

Understanding the most common brake problems and their causes is essential for technicians and drivers alike. Here’s a breakdown of what to watch for.

Soft Brakes and Hard Braking

When brakes feel “soft” or require excessive pedal pressure to slow the vehicle, something’s wrong. This often points to issues in the foundation brake system, the linings or drums, or the air system.

Common causes include:

Brake Noise

Air brake systems are naturally loud—but not all noise is normal.

Listen for:

Lubrication and regular maintenance help prevent most noise-related problems.

Pulling Brakes

If a truck pulls to one side during braking, it means one brake is working harder than the others.

Check for:

Even using different friction materials on the same axle can cause imbalance. Always match components for consistent torque.

Brake Odours

A burnt smell coming from the wheels? That’s usually a sign of overheated or dragging brakes.

Dragging brakes not only smell—they also wear faster and compromise safety.

Preventing Brake Issues

Never cut corners when it comes to brakes. Whether you have drum or disc brakes, a few extra minutes in the shop could prevent disaster on the road.

At Parts for Trucks, we know how critical brakes are to keeping our roads safe. Whether you’re behind the wheel or under the trailer, knowing what to look for—and when to act—can make all the difference.

If you're looking for brake inspections, replacement components, or expert service, call or stop by your local PFT branch. We're here to help.