One

　　Excavator operating handle

　　The total components of the excavator operating handle are two parts.The upper part is the operating lever,and the lower part is the operating pilot valve.If you open the outer shield of the handle,you can see that there are four plungers covered at the top,and the middle is a ten thousand.There are six hydraulic pipes connected to the bottom of the joint,which are 1 oil inlet pipe,1 oil return pipe and 4 pilot oil pipes.Generally,a small filter screen is installed at the joint of the oil inlet pipe.We need to clean it regularly to prevent oil from entering.The oil circuit is blocked.

　　What's the problem of the excavator handle laborious

　　tow

　　The operation of the handle is too heavy

　　Due to the different brands of handles,some users feel very uncomfortable when they just operate them.They feel that the handle is very heavy and think that there is a malfunction.In fact,it is not a problem with the machine,but an illusion of personal use habits.When we use unfamiliar machines,we can adjust the length of the handle first,and then try to feel it without starting to see the effect.If it is really heavy,we need to check whether it is a pilot valve.Caused by excessive pressure,or see if the pilot oil filter is unblocked.

　　three

　　Handle shaking failure

　　If the handle is shaking,you can first measure the pressure of the pilot valve and observe whether the pointer of the hydraulic gauge is swinging back and forth.If this phenomenon occurs,disassemble and check the pilot pump.Most of it is caused by severe gear wear or tooth loss.The pilot pressure is unstable.

　　four

　　The excavator alone moves slowly and malfunctions

　　If the excavator moves slowly and the engine is not holding back,the pilot oil circuit must be considered.When this fault occurs,first check the pressure of the pilot oil circuit;if the pressure of the pilot oil circuit is normal,measure the pilot"secondary pressure"of the failure action separately.The next step is to disassemble and inspect the pilot valve core to see if there are any problems such as abrasion,jamming,and damage to the sealing ring.

　　Fives

　　Pilot handle detection

　　It is necessary to connect a pressure gauge,follow the pilot handle hydraulic pipe to the main valve cover,and then connect the pressure gauge.Of course,the"secondary pressure"of the pilot handle will be slightly lower than the pilot pump pressure.

　　six

　　Pilot handle maintenance

　　The maintenance of the pilot handle is relatively simple.Just remember that the machine has a pilot filter element.The pilot filter element needs to be replaced every 500 hours of work.The pilot plunger head needs grease lubrication to ensure that it does not dry grinding.Of course,the oil inlet of the handle mentioned in the above structure has a filter to be observed and cleaned frequently.