You can clean all corrosion or contaminates from the steering knuckle bore and the hub and bearing assembly, lubricate the steering knuckle bore with
Wheel Bearing grease or the equivalent, install the O-ring, the wheel speed sensor, the wheel hub and bearing and splash shield, the wheel hub and bearing mounting bolts, the nut, and the washer, connect the electrical connection, install the wheel speed sensor and brake hose mounting bracket bolt, install the rotor, install the tire and wheel and lower the vehicle.