4YZ-4自走式玉米收获机是黑龙江省赵光机械厂经过多年试验研究,在两行牵引式玉米收获机的基础上发展起来的,适合大面积作业。收获行数为4行,行走速度为1.4～20千米/小时,配套动力106.7千瓦。该机生产率高,收获损失小。子粒破碎率为0.68%,落地子粒损失为0.82%,落地果穗损失为0.64%,剥净率为90%。 4YZ-4 self-propelled corn harvester is the Zhao Guang Machinery Plant in Heilongjiang Province after years of pilot study, developed on the basis of two lines of trailed corn harvester, suitable for large-scale operation. The number of rows to be harvested is 4 rows and the walking speed is 1.4 to 20 km / h with an auxiliary power of 106.7 kilowatts. The machine high productivity, loss of harvest small. The rate of grain breaking was 0.68%, that of falling ground grain was 0.82%, that of falling ground ear was 0.64%, and the peel rate was 90%.