1．旋耕机动力输出轴折断和十字节损坏。主要原因是传动轴伸缩卡死、倾角过大咬死、猛降入土、刀片遇到大石块扭力过大、未及时加注黄油等引起。要查明原因，更换新轴，按规定加注黄油。2．旋耕机负荷过大，是由耕深过大、土壤粘重、过硬造成。要用减小耕深、降低机组前进速度 1. Rotary tiller power output shaft broken and cross section damage. The main reason is that the transmission shaft telescopic stuck dead too much inclination, plunged into the soil, the blade encountered large boulder torque is too large, not timely raised butter and other causes. To find out why, replace the new shaft, according to the provisions of filling butter. 2. Rotary tiller load is too large, is due to too deep farming, soil sticky weight, excellent result. To reduce the depth of farming, reduce unit forward speed