Excavator engine work is mainly due to the problem of fuel systems, and the feature of the fault is:
When the engine is air, it is manifested as working, and the engine sound is low, the engine is easy to turn off, and the troubleshooting is as follows:
1. First open the hand oil pump, there is no air in the system, work normally, then replace the fuel thick filter, the engine work is basically normal, but in the case of large load operations, it is still abnormal. In this regard, some people believe that the high pressure oil pump is insufficient, and it is considered to be the failure of the oil passage after analysis, so the oil pipe between the filter is removed and the oil pipe is discovered. At the same time, the tube head is blocked in the slogan. This confirmed that the oil supply is not smooth, resulting in insufficient oil supply, which causes the excavator operation weakness, replacing the tube at the same time cleaning * After the clearance of the air, the work is restored to normal.
2, the excavator is working properly during the air, but black smoke is in the excavation.
Checking method: First check the oil supply system, the result is normal, indicating that the engine itself has no problem; observing that its exhaust pipe is more carbon deposits, which is considered to be too large, resulting in power loss and black smoke. Open the muffler, work is basically returned to normal after clearing the carbon, but there is still a black smoke, and then carefully observes that the air filter vacuum indicator is red, prompts to clean or replace the filter, but replace several new filter. The engine is still black, the air filter vacuum indicator is still red. At this time, I found that the intake is not smooth, so I find the intake road, I found that the air rough filter has been blocked by the wickets and other debris, clean up * net After the engine works back to normal.
