6. Screen surface plug
Mainly due to improper adjustments threshing device, broken stem too much, fans do not justify blowing up objects, so that the front was broken sieve stem, Sui "blocked" and caused by pushing transportation device overload or blockage; cleaning devices improper adjustment , sieve opening small, small amount of wind, wind direction and adjusted properly, sieve amplitude or inclination is not enough, resulting in emissions of screen surface more grain, money increased election loss; crops moist or too many weeds, which accompanied by lower cleanliness . The light of these failures should be appropriate to reduce the amount of feed to reduce the drum speed or appropriate threshing gap increased to improve the air flow and changes in wind direction, adjusting the screen surface space in order to improve the screen surface and push the browser's plug Yun; adjust the volume of sieve opening and wind; Last inclination to change the screen to increase speed, such as drum.