Common faults and maintenance methods of Cummins Ecofit urea pump

1. Urea pump only spray liquid, no gas, instrument panel report fault
Problem solving: there is no gas, mainly the problem of gas path. The qualified range of Cummins Ecofit air pressure sensor is generally 300-400kpa. The crystallization of air solenoid valve and mixing chamber check valve will cause the reduction of gas flow.
2. Urea pump pressure build-up failure
Problem solving: each urea pump has its own disadvantages. The biggest disadvantage of Cummins Ecofit urea pump is the failure of pressure build-up. The common cause of pressure build-up failure is that the urea tank is not clean, which leads to the blockage of the liquid inlet filter screen under the motor inside the pump. The short-term solution is to blow back with air and clean the filter screen. The blockage of urea filter screen with liquid level sensor is not too serious. If the urea pump is directly installed on the chassis, this problem will be very common. Pump club, EFI technology disseminator, pump club, everything!
3. The power of the vehicle is insufficient and the torque is reduced
Problem solving: this kind of problem is the same as the above fault, which is mainly caused by the blockage of the filter screen caused by the failure of pressure building, the decline of the liquid suction capacity of the urea pump, the decline of the ability to neutralize the tail gas, and the start of the reduction of the no value exceeding the standard.
4. When the car starts or empties, the instrument panel will report a fault
Problem solving: when the car starts and empties, it reports a fault, which indicates that there is a problem with the bypass valve inside the pump. This problem does not have a great impact on the pump, but it will be relatively serious in general. The main problem is that the emptying link of the urea pump can not be completed.
Diesel SCR after treatment system is easy to have problems, and the market price of replacing a urea pump is about 4000 yuan. Therefore, it is very necessary to understand and master the common faults and maintenance methods of urea pump. At the same time, it is recommended that you regularly clean and maintain, so as to ensure the normal work of after treatment and vehicle and save driving cost.