我厂生产丰收—27型拖拉机已有20多年历史。这种拖拉机仿制于英国福格森—20拖拉机,虽经过多次改进,但还存在;(1)功率不足,在泥脚深的田中作业,带不动农具;(2)比油耗偏高;(3)扁形齿轮转向器可逆性大,容易反冲打手,同时增加轮胎磨损; I plant bumper harvest -27 type tractor has more than 20 years of history. This tractor imitation of the British Ferguson -20 tractor, though after many improvements, but still exists; (1) lack of power, work in the mud deep in the field, with fixed farm tools; (2) higher than the fuel consumption; (3) flat gear steering reversible, easy recoil thugs, while increasing tire wear;