BB41

Become a Better CDL Driver:

Brakeaway Brakes

Index

Click on each topic to consult it.

1. Introduction

2. Brakeaway Brakes

3. Summary

4. Quiz

Learning Outcomes

Once you finish this course, you will:

• Explain how the brakeaway and emergency braking systems work, including the automatic activation of trailer brakes when pressure drops between 20 and 45 psi, and the role of the tractor protection valve in maintaining the tractor’s air supply during a trailer separation.
• Conduct a daily inspection of the emergency braking system, including testing the system by reducing air pressure and verifying that the emergency brakes engage within the specified pressure range (20-45 psi), ensuring the system is functioning correctly before driving.

Introduction

Picture yourself driving on a busy highway, towing a fully loaded trailer. Suddenly, you hear and feel a loud, jarring bang. Glancing back, your worst nightmare unfolds—your trailer has detached and is now sliding uncontrollably down the road behind you. If your braking system functions properly, both your vehicle and the trailer should come to a stop quickly, potentially averting a more serious catastrophe.

Brakeaway Brakes

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Click here to listen.

Summary

The brakeaway and emergency braking system is designed to ensure both you and the trailer can come to a stop in the event of pressure loss. Keep in mind: if the trailer detaches, bring the tractor to a halt and allow the system to automatically activate the trailer brakes. Be aware that the trailer brakes will engage automatically when the pressure drops between 20 and 45 psi, and the tractor protection valve will safeguard the tractor’s air supply if the trailer separates. Always test the emergency braking system as part of your daily vehicle inspection.

You are ready for the Quiz

You’re all set for the quiz! There are a total of 10 questions. Feel free to take it multiple times, and we’ll only report your best score.

Question 01

Question 02

Question 03

Question 04

Question 05

Question 06

Question 07

Question 08

Question 09

Question 10

You have finished your course!