Carlisle Brake & Friction's Single Circuit hydraulic adjusters are used for in-line adjustment of high displacement hydraulic wet disc brakes. The function of the adjuster is to maintain a fixed running clearance between the stationary and rotating wet brake elements. The adjuster compensates for friction material wear by allowing a fixed volume of fluid to escape from the brakes after each application. As a result, the fluid displacement required to apply the brake, remains constant throughout the life of the brake.