1农机故障巧修(1)巧除黑烟。拖拉机常常出现排气冒黑烟,工作无力、冷却水开锅故障,主要原因是柴油机排气管和消声器积炭严重,致使排气阻力增加;汽缸内气排不净,导致进气不足,发动机燃烧不充分,功率下降。遇到此情况,只需拆下排气管和消声器,清除积炭,即可排除故障。(2)巧取断螺栓。对于折断后还有一段露出机件外部的螺栓,可用一个孔径与断螺栓相近的废螺母,套在折断螺栓的外露部位,用电焊从孔内将螺母与螺栓焊 A breakdown of agricultural machinery (1) In addition to black smoke. Tractor exhaust black smoke often appear, work weak, cooling water boiling pot failure, mainly due to diesel engine exhaust pipe and muffler coke serious, resulting in increased exhaust resistance; cylinder exhaust is not net, leading to insufficient intake, the engine combustion Insufficient, power down. In this case, just remove the exhaust pipe and muffler, remove coke, you can troubleshoot. (2) clever take broken bolts. After the breakage there is a section of exposed bolts outside the machine, available with a hole diameter and broken nuts similar to the waste nut, set in the exposed parts of the broken bolt, welding the hole with the nut and bolt welding