FAQs: Truck Brakes Maintenance

Iron Buffalo icon
Iron Buffalo Truck & Trailer
September 15, 2023
FAQs: Truck Brakes Maintenance

Why is Regular Brake Service needed for your truck?

When fully loaded, trucks may weigh up to 80,000 pounds, which means they take longer to come to a complete stop. It takes around 135 feet for a standard passenger automobile going at 55 miles per hour to go to a full stop. On the other hand, a fully loaded semi-truck may take up to 200 feet to halt. The commercial vehicle may take up to 450 feet to come to a standstill if the truck's brakes are "hot," indicating the driver has been using them for a time. These differences in slowing distances may seem negligible, but 75 feet might be the difference between life and death in an accident.

As previously stated, truck stopping distances are greater than those of smaller vehicles. As a result, any brake wear or damage increases its time to stop a truck. That is why commercial truck drivers must keep their brakes in good working order. Good brakes assist truck drivers in predicting stop distances for their trucks, even if it's just a few feet, which keeps other cars safe. 

Furthermore, up-to-code brakes may help trucking companies save money by avoiding expensive accidents and penalties. In truth, it is the truck owner's and operator's legal obligation to guarantee that the braking system complies with federal requirements and that the law maintains all sections of the system.

Why does my truck shake when I brake? 

The most common reason (disks) is front brake rotors which are deformed or unevenly damaged, are the most common reason (disks). However, there might be other reasons for this. When the vehicle is halted, the rotor is part of the brake disc pushed by the brake pads. The new brake rotors have a consistent working surface all around, and the braking strength stays constant when the brakes are applied while moving.

The braking force fluctuates as the rotor rotates because an uneven or twisted rotor has thicker and thinner sections. Can a change in brake power cause the steering wheel to shake when braking downhill?

When this occurs, you may sense a pulse in the brake pedal. This may also create vehicle shaking while braking after installing new brakes. This may happen with both the front and rear brake rotors, although the front rotors are more prone to shake the steering wheel.

The back axles of some of the automobiles feature drum brakes. Warped or corroded rear drums may also cause brake pedal pulsation. What might be the reason for uneven brake rotor wear? It might occur for a variety of causes. It may also happen if the automobile is kept outdoors for an extended time without being moved.

How long do brakes last on a truck?

Brake pads typically last between 25,000 and 65,000 miles, while some people's brake pads may last up to 80,000 miles. While a precise figure is hard to offer, the 40,000-mile range is an excellent place to start when planning car maintenance. Following your vehicle's recommended service intervals will give the finest care for your Honda, as they will take into consideration everything from torque calculations to OEM requirements. However, the lifetime and quality of your brake pads are determined by various variables.

How to test electric trailer brakes without a truck?

The car must be raised to test the trailer brake wire. Make your jack and jack stand out from the crowd. Raise the steering wheel. Manually spin the wheel and apply the brakes. The wheel should come to a complete halt due to this action. If one of the wheels unexpectedly stops spinning, a current indicates that the brake wire is in good working order. If you have any doubts, you may repeat the procedure described above.

What are spring brakes on a truck?

Service brakes are air-applied, while spring brakes are not. When air pressure exits the brake chamber, they apply, and when air pressure builds up in the chamber, they release. Service brakes and spring brakes have distinct types of brake chambers.

What are the cut-in and cut-out air pressure in a typical air brake system? 

The cut-in and cut-out pressures dictate the usual pressure range of an air brake system. Usually, the cut-out pressure is 138 to 173 kPa (20 to 25 psi) higher than the cut-in pressure.

Application for a service the camshaft is rotated, and the brakes are applied via the slack adjuster. The compressed state of the emergency spring is maintained by air pressure in the spring hold-off compartment.

How do truck air brakes work?

Instead of hydraulic fluid, compressed air is used to operate air brakes. Drum brakes, disc brakes, or a combination of both may be used as air brakes. An engine-mounted compressor compresses the air, and the compressed air is then pumped into the air storage tanks, where it is stored until required.

The service brakes are applied with air pressure, and the parking brake is released with air pressure. The system has several air circuits. When the air pressure in the spring brake chamber is removed, the parking brake engages by spring force in the parking brake part of the chamber.

This also enables you to utilize the parking brake as an emergency brake. If the air pressure drops too low, the spring in the chamber will be able to resist the force of the air on the diaphragm and apply the brakes to all four wheels. You may compare the operation of air brakes to that of a hydraulic braking system. When the driver pushes the brake pedal, air pressure is supplied to the wheel in the same way as hydraulic pressure is applied in a hydraulic brake circuit.

How long should brake pads last on a truck?

Average brake pads on trucks would last somewhere between 25,000 miles and 60,000 miles. However, we can also see how some people get their brake pads to run over 80,000 miles. It all depends on your driving patterns and the road conditions.