The common causes and solutions for the failure of the excavator's holding machine are:
The engine speed of the excavator decreases obviously, the exhaust pipe takes black smoke, and the excavating action is slow to excavate the weakness. This is the suffocating car. It can also be understood that the engine output power can not reach the hydraulic pump.
Generally speaking, it is the engine power decreasing or the pressure increasing of the hydraulic pump. The hydraulic valve blocks the flow of hydraulic oil, and the electromagnetic valve fails.
Check the engine to see if the engine is abnormal, the intake, the oil, the coolant and the oil are normal. It is no problem to check the damage or blockage of the diesel pump and the injector. Then listen to no noise. If there is a murmur, it may be the internal problem of the engine. To see whether the hydraulic oil filter element is blocked; 2, the hydraulic pump to adjust the pressure and flow; 3, whether the pressure regulating valve is blocked; and whether the 4 solenoid valve is damaged.
The excavator should be strictly carried out according to the maintenance manual, and do not overload, excavate, hoist and barbaric construction when working. Otherwise, it will cause unrepairable results.
The above is the master of the MLT master's maintenance factory on the cause of the "Kubota 155 excavator occasionally choking machine" of Master Liu in Luxian County, Luzhou. In addition, some excavators will say that the pump flow can be adjusted after the problem of holding the machine, the key is whether the large pump flow is not adjusted freely, what influence the machine has, and how to judge the engine is the liquid. The pressure problem or the engine problem?
For example:
The main reasons for suffocating, the lack of vehicles and the acceleration of weakness are:
1. The air intake is not smooth and the air filter is blocked
2. The exhaust is unobstructed
3, fuel is not right (premature)
This is basically the reason:
The excavator holds the car: in a simple way, it is not moving. When the engine is working normally, when the power is greater than the resistance, the engine speed will rise and the car runs faster and faster. When the resistance is greater than the power, the engine will fall down, smoke or even extinguish. It is also the same in the excavator. Only the excavator is used to start the engine. The machine will drive the hydraulic system to work.
The reason for the car suffocating is because the load of the car is more than the power output by the engine. The engine will hold back the car for the reason, and the black smoke will all appear, and the troubleshooting is to increase the engine throttle and check the engine fault.
