With the help of the System of increased precision of following ground contours, the joints of wheel levers work gently and smoothly, removing additional vibration from the sowing units.
Wear of wheel lever assemblies leads to backlashes, and later to jams, which create additional vibration on the row units, causing shaking of seeds (when using a mechanical seed meter) and unwinding of threaded joints.
3-D model of modernization of wheel lever on the frame of John Deere 7000 with composite materials:
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