This front axle joint transmits steering motion from the steering gear to the wheel hub on the host tractor. It sits at the outer end of the axle beam, connecting the tie rod or drag link to the steering knuckle. Wear in the ball socket or pin bore produces free play that causes wandering steering and uneven tire wear. The joint is machined to the same pin and socket dimensions as the original assembly, so it installs without shimming or adapter sleeves. On reinstall, tighten the retaining nut to the specified torque and secure it with a new cotter pin.