Long reach front excavator stall speed drop reasons repair and treatment methods

 The long reach front excavator slowing down seems to be a minor problem, but if it cannot be dealt with in time, it may cause major failures such as the excavator holding the car. We hope that the majority of operators and owners will pay attention and pay attention to it.

Trouble performance: Long reach front excavator slowing refers to the phenomenon of engine slowing during excavator operation. Generally, the engine speed falling within 200 is within the normal range. If the slowing speed exceeds 200, then your car will "slow" , If it is not repaired and handled in time, it may cause the excavator to hold back and affect the work of the long reach front excavator.

1 Speed drop within 200

2 Over 200, even stalling the car

Reasons for the engine speed failure of the long reach front excavator:

1 Under normal circumstances, if the excavator's speed is less than 200, and does not affect the excavator's work, can you check whether the excavator's intake pressure sensor is damaged? (Maybe the excavator's operating environment is too poor and the air filter element is not replaced for a long time. (Causes damage to the intake pressure sensor.)

2 More than 200 is likely to cause stalling of the car. The reasons for the failure are as follows:

. The oil circuit problem or the air intake system leaks.

The engine intake is insufficient or leaking, the final cooler is not cooled enough, and the intake temperature is high.

. Diesel problem or excessive wear of the diesel pump.

. Engine parts problems. It is recommended to adjust the valve, check the fan speed, water temperature radiator.

. If the engine load drops the speed or even stalls the car, it may be caused by insufficient fuel supply. It is recommended to check the oil circuit and circuit, check the fuel filter and other filtering devices. If the filter is blocked, the fuel supply will not be smooth, and it will The engine speed drop of the extended boom excavator has occurred. In addition, if the engine suddenly increases the load and the speed drop occurs, it is normal.

If the long reach front excavator is operating in high altitude areas and the engine slows down, the main reason is that the engine load changes or the air intake is insufficient. When the hydraulic system of the excavator fails, the pump displacement cannot be changed, which will easily cause the speed to fall. Car phenomenon.

There are two main reasons for the engine speed drop of the EFI excavator: the engine performance is degraded or the main pump has a problem. At this time, you need to check the engine and the main pump, and remove the hydraulic filter element to see if there is any copper powder? If there is copper powder, then The main pump is worn; or enter the monitoring panel to check the engine speed, the low throttle idle speed is 1000 rpm, the high throttle idle speed is 1300 rpm, and the maximum working throttle is 1900 rpm. Remove the solenoid valve on the main pump and clean it to eliminate the fault.