0445120321 Injector Assembly for Sinotruk MAN D20 Engine

0445120321 Injector Assembly for Sinotruk MAN D20 Engine Featured Image
  • 0445120321 Injector Assembly for Sinotruk MAN D20 Engine

Short Description:

0445120309 common-rail fuel injector assembly is high-precision replacement part for Dongfeng DCI11 diesel engine,It is widely used on Dongfeng Kinland heavy trucks for long-distance highway transportation.

Product Detail

Product Tags

description

As the core fuel injection component of Sinotruk MAN D20 diesel power, 0445120321 withstands continuous high-pressure diesel scouring, frequent load changes and mechanical vibration in long haul transportation. Ordinary injectors easily suffer nozzle clogging and valve group degradation under heavy-duty cycles, resulting in uneven atomization, incomplete combustion and obvious power drop under heavy load. This injector is specially calibrated to match D20 engine high torque characteristics, adopting high-strength alloy steel and reinforced control valve assembly. Precisely machined nozzle generates fine fuel mist to boost combustion efficiency. Optimized internal oil circuit stabilizes injection timing and fuel delivery volume, reducing back-leakage risk for long-hour operation. Reinforced integrated construction resists cyclic pressure shock and vibration. Every finished injector passes bench inspection of fuel flow, spray pattern and durability test for reliable substitution of aged OEM injectors.

product parameters

Model Number: 0445120321
Product Type: Complete common-rail diesel fuel injector assembly
Applicable Engine: Sinotruk MAN D20 Diesel Engine
Applicable Equipment: Sinotruk Sitrak, HOWO heavy-duty trucks
Rated Working Pressure: 1600‑1800 bar
Working Temperature: ‑30℃ ~ +125℃
Material: High‑strength wear‑resistant alloy steel, ageing‑proof high‑performance sealing compound
Included Parts: Precision nozzle core, control-valve assembly, matched sealing repair kit
Installation Method: Original‑position direct replacement
Working Condition: Heavy-duty long haulage, mountain climbing, continuous operation, variable load cycles
Core Function: Boost heavy-load power, stabilize idle speed, improve fuel atomization, reduce exhaust smoke and restrain abnormal fuel consumption

advantage

・OEM Consistent Mounting Dimension: Manufactured according to original installation benchmark, mounting holes and outer contour fully match OEM spare parts, supporting direct swap without secondary machining or manual adjustment.
・Calibrated for Heavy-duty Long Haul: Tuned for D20 high torque requirement, maintains stable injection performance even under poor fuel quality and repeated climbing.
・Whole-Unit Replacement Reduces Equipment Downtime: Complete assembly replacement simplifies on-site repair steps, shortens vehicle idle period and cuts fleet operation cost.
・Batch-wise Bench Testing: Every batch passes flow deviation test, spray morphology inspection and durability verification, ensuring consistent performance between batches.

FAQ 

Q1: What faulty symptoms can this 0445120321 injector solve?

A: It improves common faults caused by nozzle carbon coking and internal component wear, including insufficient power under heavy load, unstable idle speed, exhaust smoke, slow throttle response and abnormal fuel consumption rise.

Q2: What engines and vehicles is 0445120321 suitable for?

A: It is specially adapted for Sinotruk MAN D20 diesel engines, widely used on Sinotruk Sitrak and HOWO heavy trucks for long-distance transportation.

Q3: How to extend injector service life for long-haul heavy trucks?

A: Use qualified diesel fuel and replace fuel filter on schedule; avoid long-time continuous full-load climbing; reduce frequent sharp acceleration; keep fuel system clean to reduce impurity abrasion inside the injector.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

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