Cleaning Systems

Dyna-Flo™ II – high capacity cleaning with easy in-cab adjustment

Adding cutting capacity doesn’t do much good if your cleaning system is overloaded. To make sure your 70 Series Combine can keep up with faster harvest speeds and higher-yielding crops, there’s the Dyna-Flo II Cleaning System. We’ve equipped the big 9870 STS with a specialized Dyna-Flo II system with increased cleaning capacity (or ICC) that offers a 15-percent boost in cleaning capacity – a must to match the higher through-put of our largest Class 8 combine. The front chaffer has 1,100 square inches of additional cleaning area, along with a more aggressive sieve stroke and a higher fan speed. The rest of the 70 Series STS lineup also benefi ts from the longer sieve stroke, which shakes the material more and thereby improves performance. Together, these improvements help reduce cleaning shoe losses, especially in demanding, high-yield conditions.

Stage 1

Four conveyor augers are located beneath the concave, where the volume of separated material is highest, to evenly move material into the cleaning system. The deep auger troughs provide uniform distribution of material to the cleaning system with less bunching, even on side slopes or when going up and down hills.

Stage 2

The Dyna-Flo II cleaning fan blows a high volume of air across the full width of the cleaning shoe with an improved air distribution between the front and rear portions of the cleaning shoe. About 30% of high velocity air fl ows to the front chaffer; 70% of high volume air is guided to the rear chaffer and sieve. The result: maximum effi ciency and a clean grain tank sample.

Stage 3

Material from the separator is pre-cleaned in two stages. The front fi xed chaffer, the fi rst step, helps to thin the crop mat. The raised front chaffer pre-cleans up to 40% of free grain before it reaches the rear chaffer. Air from the cleaning fan elevates any light material travelling over the end of the raised front chaffer. This results in more aggressive separation of material at the step pan and increased cleaning performance.

Stage 4

The two-piece front and rear chaffer and the single-piece sieve are designed specifi cally for the STS combines. This robust design allows our cleaning shoe to operate at a longer stroke and higher speed than other combines. The result: a high performance, compact design that reduces slope sensitivity while delivering perfect results – proving again how our intelligent design makes the difference for you.

The high-inertia shoe drive, now standard on 9670 STS, 9770 STS, and 9870 STS Combines, provides smooth, consistent power delivery with less belt slippage.

Self-leveling Cleaning System for all STS combines

Minimize harvest loss and maintain level-land productivity on sidehills with 8 to 12 degrees

of slope with our innovative self-leveling cleaning system. It has two distinct design advantages over competitors:

1. Four individual chaffer and sieve bays, versus

a single large one. This approach delivers better control and handling of the grain on slopes; and there's no complex drive system for the bays to worry about or maintain.

2. An exclusive overcompensating system.

The chaffer and sieve bays actually tilt past the level position. This distributes the grain over the full area of the bays for better, faster separation, as well as maximum grain savings. The result: Up to 95 percent level-land capacity in corn at level-land ground speeds – all with low losses. Compared to other self-leveling systems, we give you the fastest ground speeds and lowest crop loss on slopes. When equipped with the self-leveling cleaning system, the 70 Series are the most productive combines you can have on slopes!

9570, 9670, and 9770 – Dyna-Flo II

The proven Dyna-Flo II cleaning system (standard on 9570 STS, 9670 STS, and 9770 STS) pushes high-velocity air through a one-piece, raised-front chaffer. Meanwhile, high-volume air fl ow is spread evenly across the width of the shoe. This high air fl ow carries the chaff to the back of the machine, where it’s blown out.

Not only does the Dyna-Flo II system give you cleaner grain, but it also helps reduce tailings returns.

So you don’t have to climb back into the cab, ground level

adjustment of the cleaning system is standard equipment on all 70 Series STS Combines.