有一台新的东风-12型手扶拖拉机,在磨合试运转期间,发现机油压力指示阀升不足,并出现少量冒黑烟现象。立即停车检查。因为该车是新的,机油泵不可能因磨损而引起机油压力不足,故障原因可能是机油滤网堵塞或油底壳机油不足。熄火30分钟后抽出油标尺,检查油底壳机油,发现机油反而超过上刻线,且较稀。漏的是水还是油?检查水箱 A new DF-12 walking tractor was found running short during the trial run to find that the oil pressure indicator failed to rise enough and a small amount of black smoke appeared. Stop parking immediately. Because the car is new, it is not possible for the oil pump to wear out due to insufficient oil pressure. The cause of the malfunction may be blockage of the oil filter or insufficient oil in the oil pan. 30 minutes after the flame out of the oil rod, check the oil pan oil and found the oil instead of the engraved line, and more dilute. Leakage is water or oil? Check the water tank