Long arm excavators now play an important role in all walks of life, but they will inevitably encounter failures. The most common one is that they cannot be started. At this time, we should find the reasons from the following aspects.

　　电气系统。个可能的原因是电池没电了。您可以取出电池进行检查，包括电池内液位的高度。如果蒸馏水不够，应及时补充。如发现电池老化，应及时更换新电池。检查发电机、起动机及连接线是否有问题。

　　Electrical system. The first possible cause is a dead battery. You can take out the battery to check, including the height of the liquid level in the battery. If distilled water is insufficient, it should be replenished in time. If the battery is found to be aging, replace the battery in time. Check generator, starter and wiring for problems.

　　检查油路。如果油路堵塞，往往会导致挖掘机启动困难。堵塞主要发生在油管、滤网等处，此时需要拆开检查。堵塞的常见原因是使用的油品不合格，杂质较多，使用时应添加合格的油品。同时，这也提醒我们在日常生活中要注意油路的保养。

　　Check the oil circuit. If the oil road is blocked, it often leads to difficulties in starting the excavator. The blockage mainly occurs in the oil pipe, filter screen and so on, which needs to be dismantled for inspection. The common cause of blockage is the use of unqualified oil, more impurities, the use of qualified oil should be added. At the same time, it also reminds us to pay attention to the maintenance of oil road in daily life.

　　油压不够。油箱内压力不够，使油无法送入高压泵，也会导致挖掘机无法启动。压力不足的常见原因是密封不好，或者温度过高。只要注意密封和散热，问题就会迎刃而解。

　　Oil pressure is not enough. The pressure in the tank is not enough, so that the oil can not be sent into the high pressure pump, and it will also lead to the failure of the excavator to start. The common causes of insufficient pressure are poor sealing or high temperature. As long as attention is paid to sealing and heat dissipation, the problem will be solved.

　　其次有很多机主并没有习惯每天给油水分离器放水，万一使用的油品质量不高的话就可能因为柴油水分过多而无法启动.所以要及时拧开油水分离器底部放水螺栓放掉水分，对每个油水分离器都应该该如此操作。

　　Secondly, there are many machine owners who are not used to release water to the oil-water separator every day. If the oil quality is not high, it may be unable to start because of too much diesel water. Therefore, it is necessary to unscrew the water discharge bolt at the bottom of the oil-water separator in time to let off the water, which should be operated in this way for each oil-water separator.

　　还要说一点要及时排空气，大部分 长臂挖掘机出租的手油泵安装在油水分离器上方，拧松手油泵旁边的放气螺栓，用手按动手油泵，直到放气螺栓出来的全是柴油，再把放气螺栓拧紧就完成了排空气的工作了。

　　Most of the hand oil pump of the excavator is installed above the oil-water separator. Loosen the vent bolt next to the hand oil pump and press the hand oil pump by hand until all the vent bolt comes out is diesel oil. Then tighten the vent bolt to complete the work of exhausting air.

　　通过上述简单的障判断方法，能够对一般性发动机故障进行简单的判断与，而其他的一些复杂问题，还是需要具备知识的维修人员进行检查并维修，从而保证发动机能够以好的工作状态进行运转，保证设备的可靠、的运行。

　　Through the simple judgment method, can carry on the simple judgment to the general performance of the engine and solved, and some other complex problems, still need to have the professional knowledge of maintenance personnel for inspection and maintenance, to ensure that the engine can operate in good working condition, ensure reliable and efficient operation of the equipment.

　　那么如果您对于长臂挖掘机出租等方面还有问题的话，不如就来点击 //www.wondgo.com网站，客服人员会为您进行详细的解答。

　　So if you have questions about the rental of long arm excavators, it is better to click on the website //www.wondgo.com, and the customer service staff will provide detailed answers for you.