Open IIS Manager and navigate to the level you want to manage. For information about opening IIS Manager, see Open IIS Manager (IIS 7). For information about navigating to locations in the UI, see Navigation in IIS Manager (IIS 7). In Features View, double-click Authorization Rules. In the Actions pane, click Add Allow Rule.
Many tractors have mechanical brakes, operated by a linkage and cam system instead of a master/slave fluid system. These brakes are located on the rear axles, and work independently, so that they may be used to steer the tractor in tight corners or to reverse the direction of travel. The brake pedals will interlock for road travel, so that one pedal is not accidentally engaged by itself, causing the tractor to spin while traveling at a high speed.
The brake actuator is a small mechanically operated device that is a key part of the rear air brake assembly of a trailer. Its sole purpose is to ensure that the brakes are applied at the same instance on both the tractor and trailer. If there is a momentary lag between the applications of brakes, then it is possible a jackknife could occur.