In the field of construction machinery, excavator as an important construction equipment, its stable performance and efficient operation are directly related to the progress and quality of the project. Recently, in-depth technical analysis and discussion have been carried out for common problems such as LIUGONG excavator's inability to work and engine black smoke, high engine water temperature, abnormal rotary sound and so on.

一、Analysis of the cause of failure of LIUGONG excavator and black smoke of engine

The weakness of the excavator and the black smoke of the engine are the results of a variety of factors. First of all, radiator oil leakage, oil blockage or oil leakage will directly affect the fuel supply and cooling effect, resulting in the decline of engine performance. Second, internal engine wear, such as cylinder liner, cylinder liner piston and piston ring wear, will increase fuel consumption and reduce power output. In addition, improper injector pressure, poor atomization, PT pump failure and camshaft wear can not be ignored. In view of these problems, it is recommended to regularly check and replace worn parts, adjust the injector pressure and atomization effect, and ensure that the fuel supply system is unimpeded.

二、The engine black smoke special investigation

The phenomenon of black smoke is often closely related to incomplete fuel combustion. In addition to the oil circuit problems mentioned above, oil entering the supercharger, oil adjustment is too large, air filter filth and fuel injection time delay are also important reasons. Solutions include strengthening oil management to prevent oil leakage; Reasonable adjustment of oil quantity to avoid excessive supply; Clean or replace the air filter element regularly to ensure smooth air intake; At the same time, the injection time is accurately calibrated to improve the fuel combustion efficiency.

三、LIUGONG 908D excavator engine high water temperature troubleshoot guide

Excessive engine water temperature can be caused by a variety of factors such as insufficient coolant, blocked radiator, thermostat failure, or pump failure. When checking, the coolant level and quality should be checked first to ensure that it is sufficient and clean; Then check whether the radiator is blocked and clean if necessary; At the same time, pay attention to the working state of the thermostat and water pump, and replace the damaged parts in time to maintain the normal working temperature of the engine.

四、XUGong XE250 excavator slewing abnormal noise detection strategy

Slewing abnormal noise may result from slewing bearing wear, poor gear meshing, or loose transmission components. When checking, we should first check the lubrication and wear of the rotary bearing, and replenish or replace the lubricating oil in time; Then check the gears and bearings in the gear box to ensure that there is no abnormal wear or damage; Finally, the transmission components are tightened to eliminate the loose source and ensure the smooth operation of the slewing mechanism.

五、Carter CAT325D excavator bucket action troubleshooting

Bucket failure may be caused by hydraulic system failure, electrical control problems or mechanical components stuck. When checking, the hydraulic tank oil level and oil quality should be checked first to ensure that the hydraulic system oil supply is normal; Then check whether there is leakage or blockage of hydraulic pump, hydraulic valve and pipeline; At the same time, check the electrical control lines and components to ensure that the signal transmission is correct; Finally, check whether the bucket mechanical parts are stuck or damaged, and repair or replace them in time.