- Joined
- Sep 21, 2003
- Messages
- 31,044
- Location
- Portland, Oregon
- Car(s)
- 2008 Dodge Viper, 2006 MB CLS55 AMG
Dark_Templer_102 wanted to know in another thread:
AFAIK, when no air pressure is applied, the brakes either are on or off (depending on the type of brake) due to a strong spring. Then, when air pressure is applied, the brake goes to the opposite position.
Trailers with air brakes are set to be turned on (braking) wehn there's no air pressure so that they stay stationary when not attached to the truck and so that they will apply the brakes if air pressure is lost.
I believe the main brakes stay off on semi-trucks except for the parking brake, but I'm really not sure about that.
Also how does "air brakes" work...like the ones on 18-wheelers
AFAIK, when no air pressure is applied, the brakes either are on or off (depending on the type of brake) due to a strong spring. Then, when air pressure is applied, the brake goes to the opposite position.
Trailers with air brakes are set to be turned on (braking) wehn there's no air pressure so that they stay stationary when not attached to the truck and so that they will apply the brakes if air pressure is lost.
I believe the main brakes stay off on semi-trucks except for the parking brake, but I'm really not sure about that.