5 Signs Your Truck Brakes Need Immediate Attention

With thousands of pounds riding on your rig, a brake failure can result in catastrophic accidents. Below, we discuss five clear indicators that your truck’s braking system may need immediate attention and provide actionable tips to keep your vehicle operating safely.

1. Spongy or Unresponsive Brake Pedal

When you press the brake pedal, it should feel firm and responsive. If it feels soft or spongy, it’s a major red flag. In air brake systems, this could indicate a loss of air pressure due to leaks in the lines, a malfunctioning air compressor, or worn-out brake components. An unresponsive brake pedal can also result from excess moisture in the air system, which compromises the braking force.

To identify and fix the issue:

• Check for air leaks in brake lines or around the service chambers.
• Monitor the air pressure gauge; it should stay above the manufacturer’s specified range.
• Inspect the air dryer for proper operation to ensure no moisture enters the system.

2. Excessive Noise During Braking

Unusual noises like squealing, grinding, or hissing can signal trouble in the brake system. Squealing often points to worn brake shoes, while grinding suggests metal-on-metal contact caused by completely worn-out shoes. Hissing noises, on the other hand, might mean air leaks in the system.

Signs to watch for include:

• Squealing when the brake pedal is pressed.
• Grinding that worsens over time, potentially damaging the brake drum.
• Persistent hissing sounds near the air tanks or brake chambers.

These noises don’t just go away—they usually worsen with use. Replace worn brake shoes immediately, and have a professional check for any underlying air system issues.

3. Vibration or Pulling to One Side

When your brakes are applied, the truck should stop smoothly without pulling to one side or causing the steering wheel to vibrate. If you notice either of these issues, it’s a sign of uneven wear on the brake shoes, problems with the S-cam mechanism, or a misaligned slack adjuster.

Common causes include:

• Warped brake drums causing vibrations.
• Malfunctioning slack adjusters leading to uneven brake application.
• Contaminated brake shoes due to oil or grease leaks from nearby components.

To address these issues, inspect and clean brake components regularly. Adjust slack adjusters and check for leaks around the wheel hub or axle housing.

4. Burning Smell from the Wheels

A burning smell coming from the wheels is often caused by overheated brakes. This can happen when the brake shoes fail to disengage fully due to stuck pushrods or damaged return springs. Overheating reduces braking efficiency and increases the risk of brake fade, where the brakes lose their ability to slow the vehicle effectively.

What to do if you detect a burning smell:

• Pull over immediately to allow the brakes to cool down.
• Check for binding or stuck components like the S-cam or slack adjusters.
• Inspect return springs and replace them if worn or broken.

Continued use of overheated brakes can warp drums and compromise the integrity of the entire braking system, so this symptom should never be ignored.

5. Air Pressure Warning System Alerts

Modern trucks equipped with air brakes include air pressure monitoring systems. If the warning lights or audible alerts activate, it often indicates low air pressure or slow pressure buildup in the system. This is typically caused by a malfunctioning air compressor, clogged air lines, or a faulty air dryer that allows moisture to freeze or corrode internal components.

Steps to maintain optimal air pressure:

• Regularly drain the air tanks to remove accumulated moisture.
• Test the air compressor for proper performance.
• Ensure the air dryer is functioning correctly and replace it if needed.

Ignoring air pressure alerts can lead to brake failure, especially in emergency situations where full braking power is required.

Proactive Maintenance Is Key

Keeping your braking system in top condition is essential for the safety of your truck, cargo, and everyone on the road. Routine inspections should include:

• Checking the thickness and condition of brake shoes and pads.
• Adjusting slack adjusters to ensure proper engagement.
• Inspecting air lines, compressors, and tanks for leaks or moisture buildup.
• Monitoring and replacing worn return springs and pushrods.

Stay Safe—Schedule a Brake Check

Recognizing these five warning signs can make the difference between a smooth haul and a dangerous situation. Whether it’s a spongy pedal, unusual noises, or air pressure alerts, addressing brake problems early ensures the safety and reliability of your truck. Keep your brakes in optimal condition with regular inspections and timely repairs.

If you require brake repairs in Houston, TX, contact Fleetworks of Texas today!