Florida CDL Handbook: Air Brakes
5. Air Brakes
- 5.1. The Parts of an Air Brake System
- 5.2. Dual Air Brake
- 5.3. Inspecting Air Brake Systems
- 5.4. Using Air Brakes
This Section Covers
- Air Brake System Parts
- Dual Air Brake Systems
- Inspecting Air Brakes
- Using Air Brakes
This section tells you about air brakes. If you want to drive a truck or bus with air brakes, or pull a trailer with air brakes, you need to read this section. If you want to pull a trailer with air brakes, you also need to read Section 6, Combination Vehicles.
Air brakes use compressed air to make the brakes work. Air brakes are a good and safe way of stopping large and heavy vehicles, but the brakes must be well maintained and used properly.
Air brakes are really three different braking systems: service brake, parking brake, and emergency brake.
- The service brake system applies and releases the brakes when you use the brake pedal during normal driving.
- The parking brake system applies and releases the parking brakes when you use the parking brake control.
- The emergency brake system uses parts of the service and parking brake systems to stop the vehicle in a brake system failure.
The parts of these systems are discussed in greater detail below.
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