东风—5型联合收割机在收获亩产300斤以上的作物时,存在以下不足之点:1.脱粒不净,穗头里有籽粒。2.键箱分离不净,有跑粮现象。3.鱼鳞筛面后部风量小,清选效果不佳。由于上述原因的存在,拾禾时的机械总损失达3%以上。近几年,我场大部分的生产队使用东风一5型联合收割机收获产量低的地号。 1980年,我场在学习外单位先进经验的基础上。对五队东风一5一85号联合收割机进行了改装,改装项目如下: 3.键式逐稿器后加200毫米栅状漏种格,漏 Dongfeng -5 combine harvester in harvesting more than 300 pounds per mu of crops, the following deficiencies exist: 1. Threshing is not net, the head of a grain. 2. The key box is not clean, there is running food phenomenon. 3 fish scale sieve rear air volume is small, cleaning effect is poor. Due to the above reasons, the total loss of machinery when picking up more than 3%. In recent years, most of our field production teams use Dongfeng-5 combine harvester to harvest low production numbers. In 1980, my field was based on the advanced experience of outside units. The five teams Dongfeng a 5 85 combine harvester was modified, the conversion project is as follows: 3. Key type by 200 millimeters after adding a grid-like grid leakage, leakage