Analysis Of Causes For Stall And Speed Loss Of Excavators And Maintenance Measures

Analysis Of Causes For Stall And Speed Loss Of Excavators And Maintenance Measures

Date:Jun 16, 2018

The speed of the excavator seems to be a small problem, but if it can not be treated in time, it may cause the big failure of the excavator to hold the car and so on. It is hoped that the hand and the owner of the machine will pay attention to and pay attention to it.


Fault performance:

The speed drop of the excavator is the phenomenon that the engine turns out the speed of the engine in the excavator operation. In general, the engine falls within 200 of the normal range. If the rotation speed exceeds 200, then your car will "drop the speed". If it is not repaired in time, it may cause the phenomenon of the excavator to hold the car and influence the work of the excavator.


Fault classification:

1 less than 200

2 more than 200, even choking the car out of the fire


The cause of the speed failure of the excavator engine:

1 in general, if the cutting speed of the excavator is less than 200, and does not affect the work of the excavator, can we check the damage of the inlet pressure sensor of the excavator? (it may be due to the poor environmental conditions of the excavator, and the air filter is not replaced for a long time, resulting in the damage of the inlet pressure sensor.)

2 more than 200 is likely to cause car parking. There are several reasons for the failure.

Oil road problems or air intake system leakage.

Engine intake is insufficient or leaked. The final cooler is not cool enough and the intake temperature is high.

Diesel or diesel pumps are overworn.

It is recommended that the valve should be adjusted to check fan speed and water temperature radiator.

If the engine is loaded and even suffocating, it is likely that the fuel supply is insufficient. It is recommended to check the oil circuit and circuit and check the filter device such as the fuel filter. If the filter is blocked, the oil supply will not smooth, and the engine will lose the speed of the engine. In addition, if the engine suddenly increases the load, the rotational speed will appear. The phenomenon is normal.


The main reason is that the engine load is changed or the intake is insufficient, if the engine load is changed or the intake is insufficient, the failure of the hydraulic system of the excavator can not change the displacement of the pump, and it will easily lead to the phenomenon of suffocating.


There are two main reasons for the engine drop speed of the electric injection and excavator. The engine and the main pump have problems. At this time, the engine and the main pump are checked, the hydraulic filter is removed and the copper powder is removed. If there is copper powder, the main pump is worn, or the engine speed is checked into the monitoring panel, the idle speed of the small throttle is 1000, the big throttle is idle 1300. Turn to work, the maximum throttle 1900 turns, remove the main valve solenoid valve, remove the trouble.


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