If air is trapped in the air line then ost likely its winter time and moisture and debri has accumulated in the air line causing a blockade. You could try and melt the ice in the air line, or you could do what I would do and get a rock and hit it until the stuff in the air line broke apart, but, if your really in a hurry toy wond mind paying for a new air line.
Just try not to use your parking brakes during the winter time. You know what I mean.
Air trapped in the brake lines. Bleed your brakes and that will solve the problem.
Air trapped in the system. Bleed the brakes.
If you don't bleed the brakes after having disconnected a brake line, you'll have air trapped in the system. Air is compressible(acts like a spring), brake fluid isn't. With air in the system, it's like having a fluffy pillow between your foot and the brake lever. Braking will be weak and kinda delayed.
Air in the brake lines. Severly worn break pads. Worn brake boost piston. Cracked brake line on that brake. Loose brake line.
You probably have air in the brake hydraulic line. Bleed the air out of the brake lines.
You can try it that way, but it doesn't always get all of the air out. No, air will still be trapped in the wheel cylinder or the caliber. Use the bleeder valve, that is what it is for.
there are 2 air lines from tractor to trailer.one line is a control line witch tells the supply or service line how much air to send to the brake pods. the control line is controled by the brake foot valve.
Typically brake systems in cars and pickups have brake fluid, not air in the lines. There should never be air in your automotive break line
Air is trapped in the system. Bleed the brakes to remove the air. Start at RR then move to LR, then RF, and end at LF.If it is softer than normal, it could be due to air in the lines or a ruptured line.A soft break pedal usually means there is air in the line and you need to bleed the brakes to get it out.That is very often a result of either air in the brake lines, as when you forget to fill the master cylinder, or when the brake mechanisms on the 4 wheels are set to different tolerances.Ans 2 - You can not 'set brake mechanisms to different tolerances' - What utter nonsense ! -When your brake pedal feels soft you definitely have air in the brake lines and should have them checked immediately. There can be a leak in any of the wheel cylinders, or the master cylinder may be 'bypassing' or even (at worst) a rotting brake line the has a tiny leak.
When a brake line is leaking on the Chevy Venture the brake line should be replaced as soon as possible. A leak, however small, can cause hydraulic fluid to escape the brake line which will cause a loss in brake pressure. The brakes should be bled of air after the new line is put in to remove gaps in brake pedal pressure.
air lock in the poportioning valve
More info, please. Namely, are you talking about an air brake system? You should hear some air as you apply and release the brake, but you shouldn't hear a continuous air sound as the brake is applied - if so, you've probably got a compromised air line or a bad brake chamber.