Model R Series - Rotary Disc Header
Significantly upgraded in almost every important area, MacDon’s R85 Rotary Disc Pull-Type reinvents what a rotary disc machine is capable of. Operators will experience greatly improved durability, windrow formation and cutting speed, especially in tough, heavy or wet crop conditions.
Exclusive articulated power turn (APT) hitch
MacDon’s APT hitch allows you to pull the machine on either side of the tractor for back and forth harvesting.
The vertical pivot has been moved back from the tractor to significantly reduce turning radius and make it easier to open fields.
Exclusive to MacDon, the APT hitch found on the R85 Rotary Disc and A30-D pull types represents a complete rethinking of hitch design by MacDon engineers. First, they insisted that the hitch have a high capacity all hydraulic drive system to provide overload protection for all components and reduce maintenance requirements when compared to mechanical hitch designs. Next, they repositioned the drive shaft so that a straight line is maintained between the tractor’s PTO and header pump. This further reduced vibration and wear on the unit. They also rethought the hitch assembly and moved the vertical pivot back from the tractor, and allowed the front end of the tongue to extend over it. This resulted in a much tighter turning radius compared to conventional designs and the ability to pull the machine on either side of the tractor. Finally, our engineers added a horizontal pivot to fully accommodate the rolling movement of the mower during normal operation and minimize side loads on the rear of the tractor. The end of their efforts was a completely new hitch, one that improved maneuverability, reduced maintenance and made opening a field easier than ever.
Widest conditioning rolls on the market
To improve conditioning performance, the R85 Rotary Disc and A30-D pull-types have been equipped with the widest steel on steel rolls on the market (102'/2591 mm on the A30-D; 118'/3000 mm on the R85). Wider rolls result in a thinner mat of material passing through, which increases the amount of crop in contact with the rolls, improving crimping performance and ensuring thorough conditioning of the plant stem. These conditioning rolls also feature a design which more aggressively pulls crop away from the cutting discs and feeds it into the forming shield, for reduced power requirements and improved performance in both light crop conditions such as grass and heavier alfalfa type crops.
MacDon skid shoes (16'/4.9 m model shown) operate in different positions to allow for cutting in rocky conditions (three positions on 16'/4.9 m, two positions 13'/4 m). This higher ground clearance allows for excellent rock protection.
Attached behind the cutterbar to reduce wear on the cutterbar wear plate and improve the movement of the header over uneven terrain, as well as in sand or firm soil conditions. Optional for A and 16' R Series.