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Do you drive a tractor trailer (semi) with air brakes? where is the air coming from when you notice this. This person's probably talking about a car......It is atmospheric pressure entering the vacuum booster, the air rushing past the valves inside.

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16y ago

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What is the trailer air supply?

supplies air to the trailer brakes to allow the operator to release the brakes


Your car pulls to the right?

it could be your brakes? does it go to the right when you press the brake, if so then you should release the air from the right brake, if not maybe your allignment is not good.


How do you adjust brake imbalanced?

We would need to know what type of brakes you have... S-cam air brakes, air disc brakes, air piston brakes, air wedge brakes, hydraulic drum brakes, hydraulic disc brakes... they're all different.


The brakes take two minutes to release on your 1977 ford f700 dump truck with air brakes?

The release springs are hanging-up or you don't have sufficeint air pressure built-up or have air line blockage. Do you drain your air -tanks regularely? After each use . Water in air brakes can cause rust and will hang the brakes - up


How do you bleed breaks on a 1999 V W jet ta?

To bleed the brakes on a 1999 VW Jetta, you will want to have someone press the brake to push the air down. Then, you will open the valve to release the air and any trapped brake fluid.


Do air brakes take longer to stop than hydraulic brakes?

Both air brakes and hydraulic brakes are capable of locking up the wheels. It would depend on the weight of the vehicle, tires and road conditions.


If the machine air system on a dump truck does not build up to the required pressure what effect does this have on the braking system?

The brakes will remain on, air pressure is required to release the brakes


Why might you hear air sounds when you press the brakes?

pressure through the lines try bleeding your brakes if your not sure how take it to a mechanic they will know how to and im sure they do it for under 80 bucks


Why are my brakes spongy after bleeding?

Brakes may feel spongy after bleeding due to air bubbles trapped in the brake lines. Air in the brake system can cause a loss of pressure, resulting in a spongy feeling when you press the brake pedal. It is important to properly bleed the brakes to remove any air and ensure proper brake function.


Do air brakes use brake fluid?

No, they use air pressure or actually the lack of air pressure to stop the vehicle. The brakes are fully on until pressure builds up in the tank releasing the brakes. When you push the brake pedal this removes air from the system and applies the brakes.


Why is a liquid used in a car's braking system?

A liquid is used because it cannot be compressed. Remember the scientific qualities of the three states of matter. Solids have a definite shape and volume. Liquids have a definite volume, but not a definite shape. Gases can not only take the shape of a container like liquids, but with compression, a wide variety of different volumes of gas can fit into the same sized container. Now, you want a 1:1 relationship with the medium in the brake lines and for it not to compress. The reason you bleed the brakes is to get the air out so the brakes won't be spongy, since any air in the lines can be compressed. As hard as the brakes are to operate, a significant amount of air would mean that nothing would happen when you press the brakes. The air would absorb the pressure and the fluid past the air would never get the necessary amount of pressure to operate the brakes. Now trucks do use air brakes, but the system is too bulky to be practical in cars, and not as responsive. They employ a number of workarounds and tricks to make the system work. For instance, most brakes in tractor-trailers require air to release, not apply. That way, they can be much more responsive, since they are operated by heavy springs and the air fights the pressure of the springs. So the brakes are not always prompt in releasing. For the brakes to work in the trailer, there is a relay system, where a separate air tank under the trailer is kept charged, and thus the lines from the truck signal when to use the air from that tank. That is because the distance from the auxiliary tank under the trailer is much closer to the trailer air brakes than to the air tank in the truck.


How effective are air brakes verses a standard set of brakes?

Air brakes are just as effective as a standard set of brakes. The advantages to air brakes are that you do not have to worry about leaking brake fluid.