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天津654拖拉机在工作中出现机车自动熄火。驾驶员用手油泵泵油并拧松喷油泵泵盖上的放气螺丝,待排出的燃油不夹气泡后再次起动,发动机运转几分钟后又自行熄火。对该故障可分以下几种情况进行检查判断。a.检查输油泵工作是否正常。b.检查燃油系统油路是否密封严密或进c.检查回油
Tianjin 654 tractor locomotive at work automatically turn off. The driver pumps the oil with the hand pump and loosens the bleed screw on the fuel injection pump cover. The fuel to be discharged restarts without bubbles and the engine turns off after a few minutes of operation. The fault can be divided into the following situations to check judgment. a. Check the pump is working properly. b. Check the fuel system oil tight seal or into c. Check the oil return