The brake slack adjuster is the link between the air brake chamber brake camshaft. The brake slack adjuster transforms and multiplies the force developed by the brake chamber into a torque that applies the brakes by twisting the brake camshaft.
Euclid, Haldex and BWP brake slack adjusters are equipped with an adjusting mechanism, allowing drivers to focus on driving without concern for small needed adjutments needed due to brake shoe lining wear. Euclid, Haldex and BWP as well as all maintenance professionals agree however that automatic slack adjusters should be checked on a regular basis, perhaps even as part of a driver's pre-trip inspection. The term automatic slack adjuster does not give a truck owner the license to install and forget.