Abstract: A slack adjuster comprises a worm shaft that is configured to drive a worm gear adapted for coupling to a camshaft. An adjustment assembly receives slack adjustment input from a push rod and is configured to automatically rotate the worm shaft when brake slack exceeds a predetermined limit. The slack adjuster includes a manual adjuster that is moveable between a non-adjustment position where the manual adjuster is de-coupled from the worm shaft and a manual adjustment position where the manual adjuster is coupled to the worm shaft such that a position of the worm shaft can be manually adjusted as needed.

Abstract: A slack adjuster comprises a worm shaft that is configured to drive a worm gear adapted for coupling to a camshaft. An adjustment assembly receives slack adjustment input from a push rod and is configured to automatically rotate the worm shaft when brake slack exceeds a predetermined limit. The slack adjuster includes a manual adjuster that is moveable between a non-adjustment position where the manual adjuster is de-coupled from the worm shaft and a manual adjustment position where the manual adjuster is coupled to the worm shaft such that a position of the worm shaft can be manually adjusted as needed.

Abstract: A slack adjuster comprises a worm gear configured to be coupled to a camshaft, a worm shaft in engagement with the worm gear, and a housing having a lever configured for connection to a brake chamber output rod. The housing includes an opening that receives the worm gear and a blind bore that receives the worm shaft. An adjustment assembly is installed within the blind bore and is coupled to the worm shaft. The adjustment assembly is configured to automatically rotate the worm shaft when brake slack exceeds a predetermined limit.