Only circlip retained bearing shields may be removed for cleaning or relubrication purposes. Use a needle on one end of the circlip to gently remove it from the outer raceway. The shield can then be removed by easing the needle into the gap between inner ring and shield and levering the shield out. Take great care not to push the needle too far inside the bearing as this may damage the bearing retainer. Also, be careful to not dent the shield.