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3.7.6 Ground Speed
Operating at the proper ground speed will result in cleanly cut crops and evenly distributed material into
the combine.
Reduce ground speed in difficult cutting conditions to reduce loads on cutting components and drives.
Use lower ground speeds in very light crops (e.g., short soybeans) to allow the reel to pull in short plants. Start at
4.8–5.8 km/h (3.0–3.5 mph) and adjust as required.
Higher ground speeds may require heavier float settings to prevent excessive bouncing that causes uneven cutting
and possible damage to the cutting components. If ground speed is increased, draper and reel speeds should
generally be increased to handle the extra material.
Figure 3.84, page 80 illustrates the relationship between ground speed and area cut for the various sized headers.
Figure 3.84: Ground Speed vs Acres
A - 30 ft. B - 35 ft. C - 40 ft.
Example: A 40-foot header operating at a ground speed of 9.7 km/h (6 mph) would produce a cut area of
approximately 11.3 hectares (28 acres) in one hour.
3.7.7 Draper Speed
Correct draper speed is an important factor for achieving good flow of the cut crop away from the cutterbar.
The side drapers and feed draper operate independently of each other, therefore, the speeds are controlled
differently. The side draper speed is adjusted with a manually adjustable control valve that is mounted on the
adapter. The adapter feed draper speed is fixed to the combine feeder house speed and cannot be
independently adjusted.
Adjust the draper speed to achieve efficient crop feeding onto the adapter feed draper. Refer to Adjusting Side
Draper Speed, page 81.
OPERATION
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