How Air Brakes Work in Trucks | Full 3D Animation Explained
3D Casual Learning
709,748 views
Ever wondered how heavy trucks and buses stop safely using air brakes? In this video, we break down the complete air brake system in an easy-to-understand way with detailed 3D animation.
You’ll learn about:
⏱️ Timestamps:
00:00 – Intro: The Power of Air Brakes
00:32 – Air Compressor: How compressed air is generated
00:55 – Air Governor: Regulating pressure cut-in and cut-out
01:28 – Governor Operation Explained
01:56 – Compressor Unloader Mechanism
03:31 – Safety Valve: Overpressure protection
04:09 – The Three Main Reservoirs: Supply, Primary, and Secondary
04:43 – Check Valve Function
05:43 – Why Air Dryers Are Critical
06:03 – Air Dryer Internal Components
06:13 – Charge Cycle Operation
07:21 – Purge Cycle and Moisture Removal
09:31 – Dual Brake Valve: Controlling two circuits with one pedal
10:12 – Internal Structure of the Dual Brake Valve
10:44 – Front vs. Rear Brake Circuits
12:52 – Brake Chamber Operation
13:57 – Rear Spring Brake Chambers (Emergency & Parking)
14:25 – Double Check Valve Explained
15:30 – How Spring Brakes Work and Fail-Safe Function
17:14 – Conclusion and Wrap-Up
This video is intended for educational purposes. While every effort has been made to ensure accuracy, some details may be simplified for clarity. Always consult official manufacturer documentation and qualified professionals before performing maintenance or repairs.
🔔 Don't forget to like, comment, and subscribe for more animated engineering explanations!
#AirBrakes #TruckBrakes #EngineeringExplained #3DAnimation #HowItWorks #3DCasualLearning
If you enjoy this video, remember to like, share, and subscribe to our channel for more informative content on technology, engineering, and innovation. Thank you for watching!
Please note that this video contains copyrighted material and is the intellectual property of 3D Casual Learning. Any unauthorized reproduction, redistribution, or reuploading of this video without permission is strictly prohibited.
Thank you for respecting the rights of the creator.
For business inquiries please contact mostmachines@gmail.com
© Copyright 2025 3D Casual Learning
20 Comments
The 4 tanks are protected by a multi-circuit protection valve. The MCPV not only prevents air being lost to a circuit with a leak, it also ensures the air tanks build air in a specific order: 1&2 first, then 3, then 4. You don't want a situation where the parking brake can be released when there's no air pressure for the service brakes, for example.
Also the foot valve does not exhaust supply air when the brakes are not applied, it only vents the applied air when the treadle is released.
Most trucks also use quick release valves between the treadle and brake chamber to allow them to exhaust the air closer to the wheel instead of through the foot valve.
Larger vehicles use relay valves controlled by the foot valve and fed air directly from the primary tank to deliver the large volume of air needed when there are more than one rear axle.
The animation of the front S-cam is backwards.
How Air Brakes Work in Trucks | Full 3D Animation Explained
3D Casual Learning
709,748 views
Ever wondered how heavy trucks and buses stop safely using air brakes? In this video, we break down the complete air brake system in an easy-to-understand way with detailed 3D animation.
You’ll learn about:
⏱️ Timestamps:
00:00 – Intro: The Power of Air Brakes
00:32 – Air Compressor: How compressed air is generated
00:55 – Air Governor: Regulating pressure cut-in and cut-out
01:28 – Governor Operation Explained
01:56 – Compressor Unloader Mechanism
03:31 – Safety Valve: Overpressure protection
04:09 – The Three Main Reservoirs: Supply, Primary, and Secondary
04:43 – Check Valve Function
05:43 – Why Air Dryers Are Critical
06:03 – Air Dryer Internal Components
06:13 – Charge Cycle Operation
07:21 – Purge Cycle and Moisture Removal
09:31 – Dual Brake Valve: Controlling two circuits with one pedal
10:12 – Internal Structure of the Dual Brake Valve
10:44 – Front vs. Rear Brake Circuits
12:52 – Brake Chamber Operation
13:57 – Rear Spring Brake Chambers (Emergency & Parking)
14:25 – Double Check Valve Explained
15:30 – How Spring Brakes Work and Fail-Safe Function
17:14 – Conclusion and Wrap-Up
This video is intended for educational purposes. While every effort has been made to ensure accuracy, some details may be simplified for clarity. Always consult official manufacturer documentation and qualified professionals before performing maintenance or repairs.
🔔 Don't forget to like, comment, and subscribe for more animated engineering explanations!
#AirBrakes #TruckBrakes #EngineeringExplained #3DAnimation #HowItWorks #3DCasualLearning
If you enjoy this video, remember to like, share, and subscribe to our channel for more informative content on technology, engineering, and innovation. Thank you for watching!
Please note that this video contains copyrighted material and is the intellectual property of 3D Casual Learning. Any unauthorized reproduction, redistribution, or reuploading of this video without permission is strictly prohibited.
Thank you for respecting the rights of the creator.
For business inquiries please contact mostmachines@gmail.com
© Copyright 2025 3D Casual Learning