Center-Pivot Rotary Disc Mower Conditioners. Glide through lush stands of lucerne, acres of dense grass and even tough cane crops, at high ground speeds. Case IH DC3 series center-pivot disc mower conditioners combine fast cutting with high-quality conditioning. The DC163, built to handle a variety of crops and designed for easy, uninterrupted use. Move quickly and easily from field to field, offer intuitive operation with fewer, simpler adjustments and allow you to pick up speed while maintaining consistent cutting when bad weather is on the horizon.