如果经过检查发现电路和油路都没有问题，那么就有可能是发动机产生的机械故障。
一般柴油发动机发生机械故障的几率比较低，但是一旦发生机械故障就面临着要大修发动机了，常见的发动机机械故障有拉缸、烧瓦、捣缸等等，一般情况下发动机发生机械故障都是有前兆的，比如在正常作业中发动机突然运转无力，或是总冒黑烟以及运转过程有异响等等。
4、大修发动机
机械故障多是在发动机工作时发生的，冷车启动时发生机械故障几率较低，而且一般挖掘机的发动机发生机械故障都需要吊装发动机进行拆解维修，建议找部门或是发动机维修人员进行维修。
总结：
冷车打不着车是很常见的现象，一般都发生在挖掘机停止作业好几天甚至更久之后，这种情况下打不着车的原因主要是电路故障和油路故障，具备一些检修的基础知识能在挖掘机的经营过程中方便许多。
1、机油压力传感器压力与输出电压成线性，压力从 0 到 10 bar，输出电压从 0.5 到 4.5伏。
判定故障方法：先点火开关打到“OFF” ，拔下机油压力传感器线束插头，再将点火开关打到“ON” ，测定其插头的 3脚(A24)与搭铁间电压是否为输入电压(大约为 4.5~5V),4脚(A44)与搭铁间的电压是否为零。
如果测量结果偏差较大，则说明线束状态有问题，或是 ECU 的输出电压有问题。
We will also focus on some of our standard products such as Hydraulic Head And Rotor assembly, fuel injector nozzle, feed pumps, common rail diesel and many more. That is why we would like to invite you to come over to have a look at our great booth. It is the perfect opportunity 8AUGK to get to know each other better and learn more about what we have to offer you.
Your presence will do us great honor and we are looking forward to seeing you.
On behalf of China Lutong Machinery Works Co,.Ltd., we sincerely invite you and your company representatives to visit our booth at Automechanika Istanbul 2023 from 8th to 11th of June 2023. Our information about this event is as follows,
China-Lutong is one of the professional Chinese companies in the distribution and manufacturing of parts, components and equipment for diesel fuel injection systems. Based on the principle of honesty, credibility and mutual benefit, our company always adheres to promote mutual advantage through joint efforts.
If you're participating, we'd love to see you there. Visit us at our Booth C170 in Hall 11A at the Tüyap Fair Convention & Congress Center. We hope to establish a long-term business relationship between our two companies.
