After a Cat 336D excavator is hot, it frequently appears that the digging arm is weak, the movement is coherent, and the heat engine is frequent. Sometimes the card is weak and there will be a pause. When the excavator is open, the bucket handle will sometimes sink, which It is how it happened? Liteng Machinery helps you analyze this problem!
Analysis of the overhaul of the middle arm of the hot car of the excavator:
Inspect the arm pressure compensation valve and holding valve. Check whether the arm cylinder is leaking. The distribution valve may also have problems. If the handle is newly replaced, it will be fine if it is added with some butter. It is time to change the hydraulic oil or the hydraulic oil is mixed with other brands. Hydraulic oil or fake oil.
Check whether the hydraulic pump is confluent. Check the unloading valve, the valve block may be dirty. The excavator moves slowly, the digging is weak but the engine does not hold back the vehicle, and the boom and middle arm hold the engine and there is no drop in speed. , The steering has a speed drop phenomenon, the main pressure valve is not adjusted to a great extent, the action slows down when working, there is no sense of boredom, the pressure is 28300kpa, what is the problem of the middle arm weakness?
If the engine speed is high, you do not need to adjust the throttle motor and engine; it is recommended to focus on checking whether the pilot pressure is normal: then check the working condition of the proportional pressure relief valve and do a GOOGLE PRV scan-this must be implemented by a knowledgeable maintenance worker; if you confirm the machine There is very little drop rate at full load, generally speaking, the variable system works abnormally; the internal leakage of the hydraulic system will cause the hydraulic oil temperature to be high.
If the cold engine moves fast, and the hot engine slows down to all actions, then it is troublesome, which means that the hydraulic pump is worn; in addition, you have to hydraulic system pressure is too low, does not meet the standard.
Excavator heavy load flameout analysis:
It should be a circuit problem. Clean the oil circuit and clean the oil-water separator. It may be that the oil circuit is not smooth. After blowing the oil pipe with the mouth, it is a circuit problem.
There is a filter element in the oil scale of the oil-water separator. Change it. Check if the distributor valve pin is stuck.
