Install the knuckle (A) onto the lower arm (B). Wipe off the grease before tightening the nut at the ball joint (C). Torque the new castle nut (D) to the lower torque specification, then tighten it only far enough to align the slot with the pin hole. Do not align the nut by loosening it.

NOTE: Make sure the ball joint boot is not damage or cracks.

Install the new cotter pin (E) into the pin hole, and bend the cotter pin as shown.