Test Drive CR7.90 Evo

New Holland's CR7.90 Evo is truly an evolution, bringing several technological innovations that add to already established systems from previous series

Revista Cultivar Máquinas does not always have opportunities like this, which we will report to our readers in this edition. Often the machine we are going to test is taken to some area or is a machine belonging to a farmer. This time we had the opportunity to visit one of New Holland's test areas and learn about the new model, the brand's future launch, the CR7.90 EVO harvester, in the midst of the validation process.

This new model, which was presented to dealers in 2016, will have its public launch at Agrishow. It has been undergoing validation tests by the manufacturer's engineering for months, in different locations across the country. This is a completely new model that will join the CR family, positioning itself in the upper Class VII, that is, it is a larger machine than the current CR9060 Premium . The new grid will be made up of the CR5.85 models, the CR6.80, which will replace the CR6080; the CR7.80, which will replace the CR9060 Premium; the new CR7.90 EVO and the CR8.90, which will replace the CR8090.

CR7.90 EVO

The machine we tested has the same dimensions as the current CR8090 in terms of harvest processing, what New Holland calls a wide chassis. It is a machine aimed at harvesting soybeans and corn, with a notable feature of offering customization. Versions will be offered that make it easier to meet the particular aspects of each producer. Evidently, the advantage of appropriate customer positioning will be added to the lower cost of this new model. It has a Cursor 10 engine, with 313kW (425hp) of nominal power and 358kW (487hp) of maximum power and a reduction in the grain tank, which went from 14.500 to 12.300 liters.

The engine, as we said, is an FPT Cursor 10, Turbocharged, with six cylinders and 10,3 liters of volumetric capacity, which meets the new MAR-I pollutant emission standards, according to Proconve, through the EGR system, that is, internal gas recirculation. Therefore, it does not require the use of Arla32 additive and there are no restrictions regarding the use of diesel, S500. Maximum torque is 1.600Nm at 1.700rpm.

Due to the machine's processing capacity and the experience gained in previous tests, the manufacturer is recommending the use of a 40-foot platform. On this model, we were using a New Holland Draper header, standard on this range of machines, with a flexible cutting bar. The floating system uses a set of rubber springs that can easily follow the ground level, meaning that losses resulting from the low insertion position of the first pods are neutralized.

Directly in front of the operator is a central box that controls the knives. We even used it as a reference for positioning in the harvest lines. The main advantages of this concept are the reduction of vibrations resulting from the reciprocating movement of the cutting bar and the reduction in the width of the platform dividers, due to the smaller lateral structure required to contain the system. To clean the central knife drive box, a jet of air is automatically applied approximately every four minutes.

TRACK SYSTEM AND SEPARATION

We believe that our readers may be very interested in explaining the TwinPitch double rotor. These two rotors are made up of 44 track and separation bars each, which in our opinion is one of the positive points of this line and, therefore, of this model. At the entrance to the rotors, the manufacturer placed a feeding system, formed by a double helix, which serves to maintain a constant flow of product and ensure that there is always material entering the rotors. There are adjustable fins on the rotor cover, which can be adjusted to increase and decrease the material's residence time when it is being threshed and separated. It is possible to adjust the cover fins according to the condition of each crop. Looking at the rotors from the side, you can see that the first part of the cylinder uses round bars for the track and the second part uses wide wires. This configuration is given depending on the state of the product to be processed in each position of the rotors.

Threshing and separation are carried out jointly by the axial system using two 22-inch rotors, a system exclusively used by CR harvesters. The industrial system of this new model is the same as that of the CR 8090, which is of a higher class. The manufacturer opted for 22-inch rotors so that this model has greater processing capacity, which according to tests by the New Holland team has 65% more production with this increase compared to 17-inch rotors.

It is worth mentioning that the transmission of power to the rotors uses a system called Maxitorque by the manufacturer, which prevents loss due to slippage in the drive and, as a result, interruption of the threshing and separation process.

All this grain mass processed by the rotors is delivered to the cleaning system, made up of sieves optimized to increase performance. The double action cleaning system has a large cleaning area and receives air from a fan to extract fine material.

CABIN AND CONTROLS

The cabin, placed on four rubber blocks to dampen vibrations, is the same from the CR5.85 to the CR8.90, and on the test machine we were able to observe some items from the CR8090, which can be configured as options on the new models, such as the option of a minibar positioned behind the seat, the lighting system with five xenon headlights, placed to provide a 180-degree view from the operator's station. The seat is extremely comfortable, with many position adjustments, and the surface is made of leather, which improves the contact between the operator's body and the surface. Finally, we recognize many comfort and safety qualities for the operator, both during day and night work. The side console is very practical, as well as being very accessible for controlling the machine. There is an arm rest at the operator's disposal and a multifunction control at his right hand with the keys and switches most frequently used during harvesting. On the front, a huge monitor, with color Intelliview IV and a touch screen, where information can be received, both about the machine's performance and its operation, based on previous settings. The monitor acts as a microcomputer, which even allows work to be recorded and exported via a USB port for data collection.

Read the full test below.