If you’re a licensed truck driver, then you know that proper air brake maintenance is essential to keeping your rig up and running. An important part of that is the air brake test, a test that all drivers can perform themselves. Although there are different ways to do it, we have compiled the best answers to complete the 7 step air brake test pdf.
You’ll be able to get the job done quickly and efficiently – and hopefully, avoid any costly repairs!
If you are a commercial truck driver, you know that regular maintenance is key to keeping your rig in top condition. That’s why it’s important to know how to check your air brakes. In this above post, we will give you the answer on how to pass this test. So if you’re ready to get started, read on!
- 1 What is a 7-step air brake test?
- 2 How to do a 7 step air brake test?
- 3 What is the air brake test sequence?
- 4 Which of the following are the most correct answer about using brakes when going down long and steep slopes?
- 5 What are three brake systems?
- 6 What is the main component of the air brake system?
What is a 7-step air brake test?
The 7-Step Air Brake Test is a very important test procedure for commercial drivers that must be done in order. It is also difficult for you to remember all the steps in this Test, but with the help of the word “LAGASS”, you will complete it successfully! The abbreviation for psi “LAGGASS” is:
- L. for low air warning device.
- A. for air pressure build-up.
- G. for Governor Cut Out.
- G. for Governor Cut In.
- A. For Air Loss Rate.
- S. to test brake springs.
- S. to Check Brake Service.
How to do a 7 step air brake test?
The Seven-Step Air Brake Test is a rigorous process that checks your car’s air brake system. It measures the efficiency of each part to check the governor cut-off and cut-off pressure, air pressure leak, warning horn, brake valve, and gas pressure rebuild ratio. to ensure safe stopping conditions for all riders of any vehicle type or size!
What is the air brake test sequence?
The air brake inspection sequence is an important step in ensuring your car’s safety. To get started, you’ll need to check for air leaks and shut down the engine before going into the steady mode with no movement or noises coming from noisy surroundings that can be confusing in an emergency situation.
The brake-off means that the yellow and/or red valve is pushed in (on = valve out).
1. Turn on the engine / Turn on the brake – during the CDL air brake test make sure they are working by turning on both the engine and the brake. Check gauges to make sure the governor shuts down the compressor at 120 psi. Pump the brake until the pressure drops below 100 psi to ensure the controller shuts off the compressor. If all goes well, repeat the process but add another 50 pounds of weight for a good reading each time.
2. Engine off / Brakes off – For the safety of all, make sure you never touch any of the brakes during this process. It is very important to monitor the pressure gauge to make sure it does not drop more than 3 psi in one minute.
3. Press and hold the brake pedal – For this test, you need to press and hold the brake pedal with gauge pressure to make sure the pressure doesn’t drop more than 4 psi in one minute. you can be sure that your brakes are in good working order and don’t need to replace them.
4. Key On / Engine Off / Brake Off – This is a safety feature. Be sure to fully depress the pedal and hold it until the pressure drops to 60 psi, an alarm or warning siren will sound, or before this time, so as not to cause an accident while driving.
5. Keep pumping the brake until you reach 20-40 psi – To release the emergency brake, press the brake down until you hear two clicks. The red valve will open and eject liquid from its port next to where your fingers are, and the service (yellow) will pop out when applied with enough force. this is what ensures that all four tires are always inflated in the event of any problems with one or more inflation devices.
6. Rebuild the air pressure in the tank – keep the accelerator at 1500 RPM. Monitor your air pressure and make sure it doesn’t go above 100 psi quickly. If the speed is higher than 45 seconds for an 85 to 95 PSIG tank, you will need more time with this step or risk a tire blowout
7. The best way to check brakes is to Perform tug tests.– Tow the handbrake only. You just need to pull them hard enough for the emergency brake lights to come on, but not to the point of straining or damaging any parts! Test the service brake by accelerating to 5 km/h and pressing the brake pedal. If the vehicle pulls to one side, this indicates a brake adjustment problem.
Read more here: https://swainauto.com/7-step-air-brake-test-pdf-things-to-know/
Which of the following are the most correct answer about using brakes when going down long and steep slopes?
The best way to describe how braking on steep slopes works is to use an example. When you are driving down a long, steep incline, your vehicle will naturally slow down due to the effect of your weight on the center of gravity – It is important to use the brakes on long and steep descents as it will help you maintain control. Apply engine braking by slowing down to a maximum speed of 5 mph to a safe speed, then apply hard tires on both feet at the same time – this will make every turn easier!
On long, steep descents, you should apply the engine brake until the speed reaches 5 mph.
What are the five basic components of an air brake system?
Air brakes are an important safety feature for any vehicle. The five basic components of an air brake system include the compressor, which pulls liquid from its reservoir and releases it as an exit gas at high pressure; a governor to control the rate at which this occurs (and thus the force is generated); aircraft or ducts carry away some part – usually just vapor – of what was originally released into open space, so there is less risk of releasing too much representation; storage tank where you will find both brake fluid used in conjunction with such as valves of other miscellaneous equipment.
Today’s designers can add more features such as wires that tie around certain components such as proximity sensors that trigger the automatic unlocking process if left unattended while preserving functionality even after breaking.
What is the normal operating range of the air brake system?
The normal operating range of the air brake system is between 100 and 120 psi. Pressure ranges may vary depending on make, model, or year but should never exceed 828 kPa (120 Pounds Per Square Inch). Drivers must know the typical vehicle pressure level as well as any unusual conditions they experience while driving so they can immediately report these problems for further investigation into possible causes and need Repair if needed!
Why does the air brake take longer to stop?
Your car’s air brake system takes longer to stop because it uses a fluid with less power. The advantage of this is that, if you need help slowing down quickly, there will be more time for other traffic and pedestrians; however, the downside can also mean faster wear and tear when stopping quickly in an emergency like a fire coming out of nowhere!
With hydraulic brakes, the car will stop immediately when you press on them. Air brakes take a little longer because they use fluid to slow down and pressurize to be effective Air brakes take longer to travel through lines than hydraulic fluids. With hydraulic brakes (used on cars and light/medium trucks), the braking system works instantly.
What does the foot brake send to all the brakes?
The foot brake sends air to all of your brakes, including those on the trailer. This means there is very little risk of slipping or cutting when using only this type of brake!
Using the foot brake not only helps you maintain control of the vehicle but also reduces the likelihood of an accident. When applying force on either pedal with our foot beyond what is needed for stability and traction – we must remember that it is like pressing down on an ice skate!
The governor cuts in and cuts out what points?
When the pressure of the air reservoir rises to the “limit” (about 125 pounds per square inch or “psi”), the controller stops the air compressor from pumping. When the tank pressure drops to “cut-off” pressure (about 100 psi), the governor allows the compressor to start pumping again.
What are three brake systems?
Braking System History, In most automobiles, there are three basic types of brakes including; service brake, emergency brake, and parking brake. All of these brakes are intended to keep everyone inside and on our roads safe.
What is the main component of the air brake system?
The five main components in an air brake system are the air tank, the air compressor, the brake chamber, the foot valve and the brake shoe, and the drum.
The five key components in the air brake system are the trigger button, the tank that stores compressed air as needed to exert force on your wheels; The compressor provides this additional power and helps to quickly increase or decrease the pressure as required – useful in parking lots where there is not enough braking space at the same time.
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