DLLA156P1742 LIWEI High-pressure Common Rail Nozzle for 33800-2A900 HYUNDAI

DLLA156P1742 LIWEI high-pressure common rail nozzle for 33800-2A900 HYUNDAI

 

1. Applicable models and years of the nozzle DLLA156P1742

The nozzle DLLA156P1742 is a high-performance nozzle designed for diesel engines. It belongs to the P-type nozzle series and is suitable for fuel injection systems of various commercial vehicles and construction machinery. According to the product coverage of the manufacturer Zhonglutong Parts Factory (webpage 7), this model is mainly suitable for the following models and engine brands:

1. MAN commercial vehicles: such as MAN TGS and TGX series heavy trucks, suitable for diesel engine versions after 2015.

2. Caterpillar construction machinery: including excavators (such as CAT 320D, 336D) and loaders, suitable for engine models after 2010.

3. Cummins engine: suitable for ISX and QSK series diesel engines, commonly used in heavy-duty trucks such as Foton Auman and Shaanxi Automobile Delong, covering versions from 2012 to the present.

4. Yuchai/Xichai diesel engines: such as Yuchai YC6K and Xichai CA6DM series, mainly matched with FAW Jiefang J6, Dongfeng Tianlong and other models, applicable years after 2013.

 

Due to its high-precision spray hole design (excellent atomization effect) and wear resistance, this fuel injector is widely used in fuel injection systems under high-load conditions, especially in long-distance transportation, engineering operations and other scenarios.

 

 

Injector 33800-2A900 is an electronically controlled injector used with DLLA156P1742. Its test must cover electrical performance and injection characteristics:

1. Resistance value test:

- Use a multimeter to measure the coil resistance. The standard resistance of a high-resistance injector is 13~17Ω. If the resistance value deviates from the range, the injection may be abnormal due to coil aging or short circuit.

2. Voltage and current detection:

When powered on, the injector operating voltage should be 12V (battery voltage), and the current must meet the manufacturer's specifications (usually 0.8~1.2A). Voltage abnormalities may be caused by poor line contact or ECU driver module failure.

3. Fuel injection quantity and atomization test:

- Use a fuel injection quantity tester to detect the single fuel injection quantity. The standard value refers to the engine parameters (such as the single fuel injection quantity of a Cummins ISX model is 25~30ml/1000 times).

- The spray pattern must be uniform and without scattering, and the injection angle must meet the design requirements (such as 15°~30° cone angle). If dripping or uneven atomization occurs, it indicates that the needle valve is worn or blocked by carbon deposits.

4. Sealing test:

- Under pressurized conditions (such as 200Bar), the injector should have no fuel leakage, and the sealing ring should be intact and not aged. If the pressure is not maintained enough, the sealing assembly needs to be replaced.

 

 

DLLA156P1742 and 33800-2A900 injector combinations are suitable for harsh working conditions. It is recommended to clean them every 50,000 kilometers and use high-grade diesel to reduce carbon deposits. If the vehicle experiences idle jitter, power loss or increased fuel consumption, it is necessary to check the injector resistance and atomization status first.

 

The above information is compiled from the diesel injection system manufacturer's technical documents and industry test standards. The specific parameters must be based on the vehicle maintenance manual.

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