A shallow feederhouse angle allows crop to be fed smoothly and directly into the open-mouth concave without hesitation:
Once the crop is in the cylinder or concave area, threshing and separating are accomplished as the material passes over the concave.
Large, 660-mm (26.0-in.) diameter cylinder and long concave provide a 116-degree wrap from front to rear:
The large, 10 rasp bar threshing cylinder with 660-mm (26.0-in.) diameter provides excellent grain quality and gentle material handling.
Combined with the large wrapping angle of 116-degree excellent threshing, efficiency is achieved, providing unmatched capacity in the walker segment.
Cylinder speed and concave clearance adjustments are set in the CommandCenter™.
A large, 400-mm (15.7-in.) diameter beater strips material from the cylinder and delivers it to the straw walkers. The beater is driven directly from the cylinder and operates at a single-speed relationship to the cylinder speed:
As material passes over the secondary beater grate, the angled cross bars help to separate and direct any remaining grain to the cleaning system:
The beater grate position is adjustable with a handle.
John Deeres unique walker system includes a relatively slow speed of 150 rpm in conjunction with high throw of 150-mm (5.9-in.) amplitude.
Extra-long 11-step straw walkers provide the maximum separating efficiency for any remaining grain embedded in the crop material coming from the rear beater. Walkers have low power requirements and provide best-quality straw for baling.
A return pan located below the straw walkers delivers material separated by the walkers to the
Quadra-Flo™ cleaning system. The return pan moves in conjunction with the reciprocating motion of the sieve to move any grain falling on the conveyor rapidly.
Section dividers on the conveyor help to maintain an even distribution of material onto the cleaning system, even on slopes.
The self-cleaning effect is excellent when harvesting high-moisture crops.
The HillMaster Combine is John Deere's answer to ensuring level-land performance on slopes up to 22 percent. Leveling the whole combine ensures operator comfort and top combine performance. The cleaning and separation system can work to maximum capacity. Efficiency is also maintained as the grain tank filling auger makes full use of the grain tank, which is also leveled.
HillMaster keeps the whole combine automatically and continuously leveled, providing the following benefits when harvesting on slopes:
To make road transport easier, the combine can be lowered into a transport configuration. This is done by lowering both sides of the combine at the same time. Two switches on the CommandTouch™ armrest console allow the operator to engage and disengage the automatic leveling mode or to override the automatic mode to make manual adjustments. The same controls are used to manually lift the combine into the work position or lower the combine into the transport position.
The HillMaster system provides 15 percent whole body slope compensation. This 15 percent compensation is complemented by Slope Master, which is available on all John Deere Combines. Slope Master collects material that has accumulated on the outer edges of the chaffer sieve and directs it through the return system, adding an additional 7 percent slope compensation. When HillMaster is operated in conjunction with Slope Master, level-land performance can be achieved on slopes up to 22 percent.
Regular final drives are bolted on a pivoting carrier plate. As the heavy-duty hydraulic cylinder rods extend or retract, the final drives and wheels move up and down in opposite directions, keeping the combine level.
The HillMaster feederhouse is standard on all HillMaster Combines. It provides lateral tilt range to match the tilt range of the combine.
The HillMaster pivoting front feederhouse plate provides a tilt capacity of +/- 9 degrees:
The CommandARM armrest provides access to most frequently used combine controls:
The CommandARM armrest provides the operator with unmatched control of the combine and front-end equipment. Controls are designed and positioned to enhance operator ergonomics and are easy to locate and use. Operators will appreciate the common look and feel of these control consoles in the combines, which are similar to the design used in John Deere tractors.
Adjustment of the CommandARM armrest allows the operator to set a height that best fits his personal preference. The CommandARM armrest moves on an angle, fore and aft and up and down, for precise operator comfort.
The push-button shift transmission (PBST) is an electric three-speed transmission. The PBST provides operators a quick, simple, and easy way to shift gears on the combine, by simply pressing three buttons to shift between gears. The PBST includes an electromechanical park brake that is engaged using a simple push button located on the CommandTouch™ armrest console.
The electromechanical park brake functions similarly to the ProDrive™ park brake. When the hydro handle is moved to the neutral gate, the park brake is automatically engaged to prevent unintended movement and can be locked in this mode with the touch of the park brake button on the CommandTouch armrest console.
An alarm in the CommandTouch display alerts the operator when the park brake is engaged, if it has not been released prior to hydro handle movement. When the combine engine is turned off, the park brake is automatically applied.
Forward visibility is unsurpassed with the combine cab. A large, wide-angle front windshield provides an unobstructed view from side to side and top to bottom. The cab posts are significantly narrow and the overall cab size has increased by 30 percent compared to previous cab.
Visibility to the left and right of the combine is excellent because of the shaped left and right windows. Visibility when unloading has also been enhanced with the additional glass area in the left-hand door. Narrower cab cornerposts with a recently redesigned digital corner post display gives close to a
180-degree visibility scan for the operator to watch front-end equipment, unloading operations, and road transport situations. The display placement on the right-hand corner post, the swivel of the CommandARM™ display, and the option to flip up a third display allow clear visibility of the platform and road during transport.
The rear window provides best-in-class visibility path to the grain tank and sample.
Black line = model year 2011 engine curve (with separator on)
Yellow line = model year 2012 engine curve (with separator on)
Green line = unloading (with separator on)
The isochronous engine governor keeps engine speed constant until rated engine power is exceeded. Due to the constant engine speed driven components remain at constant speed too, which enhances the combine overall capacity as well as efficiency. This is gained by preventing over blowing of shoe in low load conditions such as starting a filed, down crop conditions when leaving, entering a path, that can either end in higher shoe losses or in dirty grain tank samples.
Main benefits of the isochronous engine governor include:
The cleaning shoe speed is directly proportional to the engine speed. The cleaning shoe performs best as it approaches its maximum operating speed. With non-isochronous engines, the shoe speed was calibrated to limit the maximum shoe speed proportionally to the maximum engine speed with no load. This left the shoe speed subject to falling below the optimal cleaning speed in tougher, heavier load conditions. The isochronous governor manages and maintains the engine speed throughout the array of crop conditions, leading to a more consistent, better-performing cleaning system.
The isochronous governor electronically activates only when the separator or unloading auger is engaged. Normal engine operation (higher idle) will be present when the machine does not have the separator or unloading auger engaged.
Previously, engines without isochronous governors would decrease the crankshaft speed when load was applied to the engine. Operators could hear when this happened, which gave them an understanding of the amount of power the engine was being required to output. Since the isochronous governor maintains a constant crankshaft speed independently of the engine load, a display is created to aid in the operator's understanding of the power output by the engine.
A power meter in the cab gives the operator a visual reference of how much power is being used, similar to how changes in engine speed are displayed. The display features a bar graph, which shows the operator how much engine power is being used at any time.
As long as the combine is operated in the green range, it is running below rated power at constant rpms when reaching the yellow area it exceeds rated power engine rpm starts to drop. When reaching the red area, the operator is informed that the machine is close to reaching maximum power, so the operator should pay attention to the throughput of the machine.
A simple driveline ensures strong and reliable transmission of the engine power to all main functions. V-belts are made of heavy-duty Kevlar®, providing minimum stretch and a long service life.
Drive chains are sealed with O-rings for a long service life. The main drives feature built-in tension gauges to facilitate and speed up maintenance.
*Maximum engine power