0445120578 Injector Assembly for construction machinery

0445120578 Injector Assembly for construction machinery Featured Image
  • 0445120578 Injector Assembly for construction machinery

Short Description:

0445120568 high precision common rail fuel injector assembly  is aftermarket replacement spare part for construction machinery QSB6.7 diesel engine, widely fitted on excavators and engineering machines.

Product Detail

Product Tags

description

0445120578 common rail injector is the core fuel injection control component of construction machinery diesel engine. It precisely controls injection timing, cyclic fuel quantity, injection rate and atomization quality under high common rail pressure. The injector body adopts high-strength alloy steel. Core parts including nozzle, needle valve and control valve are strictly screened and ultra-precisely machined with micron-level clearance control. Every finished injector undergoes full item bench testing covering idle, full load, pre-injection and leakage inspection, guaranteeing outstanding injection consistency and interchangeability. Direct fit replacement without mechanical modification. Suitable for construction machinery working on earthmoving and quarry sites with frequent load variation. It effectively resolves typical engine faults such as insufficient power, rough idle, black smoke and high fuel consumption, meeting maintenance and overhaul demands for construction machinery powertrain.

product parameters

  • Part No：0445120578
  • Type：Common rail electromagnetic fuel injector
  • Applicable Engine：Construction machinery diesel engine
  • Max Working Pressure：1700bar
  • Spray Hole Quantity：7 holes
  • Spray Hole Diameter：0.16mm
  • Injection Spray Angle：155°
  • Response Time：≤0.32ms
  • Solenoid Coil Resistance：~2.8Ω
  • Net Weight：0.55kg
  • Gross Weight：0.75kg
  • Connector Type：Bosch 2-pin connector
  • Material：High strength alloy steel
  • Application：Excavator, wheel loader, construction machinery
  • Testing Standard：Bosch professional common rail test bench
  • Package：Individual anti-rust packing + Neutral carton packing
  • Storage suggestion：Keep dry, away from dust, moisture and corrosive gas, indoor storage

advantage

• High-precision matched internal components. The injector body is forged from high strength alloy steel. Core needle valve, nozzle and control valve are carefully selected, processed to micron tolerance. It resists dripping, internal and external oil leakage under continuous high pressure, keeps injection action sensitive and stable, reduces stuck valve risks.
• Professional bench calibration & full inspection. Every injector is calibrated and tested on Bosch common rail bench. Test items cover idle flow, full load flow, pre-injection precision, opening pressure and return oil volume. Small injection deviation between individual injectors, excellent batch consistency, avoiding uneven fuel supply problems.
• Optimized 7-hole atomization structure. The 155° spray angle creates fine and uniform mist. Diesel mixes sufficiently with air inside cylinder. Combustion efficiency is greatly improved. It maintains stable power output under heavy intermittent load, cuts black smoke and reduces harmful exhaust emissions.
• Strong adaptability for harsh construction site conditions. Designed for construction machinery diesel engine, fit for excavation, earthmoving and quarry worksites, coping with frequent start-stop and sudden load changes. Stable performance under wide temperature range. Better tolerance to low-quality site diesel, lowering premature failure caused by impurity abrasion.
• Direct replacement with good cost performance. Installation dimensions and interfaces follow original factory specifications. No pipeline modification required. It is an economical aftermarket spare part for engine overhaul and routine maintenance, helping customers cut maintenance expense.

FAQ 

Q1: Can this injector fit all construction machinery engines?
A1: No. Model 0445120578 injector is dedicated for construction machinery diesel engine, matching OE number 1001307155. Construction machinery has many different engine series adopting different injector internal structure and spray parameters. Before ordering, please verify engine model and old injector OE code. Wrong part will lead to weak power, heavy black smoke, rough idle and even engine mechanical damage, and it may trigger emission fault codes.

Q2: What testing will be carried out before shipment?
A2: All injectors are 100% fully tested on professional common rail test bench before delivery. The test scope includes idle injection quantity, full-load injection quantity, pre-injection accuracy, injection opening pressure, return oil flow and static sealing leakage test. Products can only be packed after all indicators meet standards to minimize defective rate.

Q3: What preparation should be done before installation?
A3: Clean fuel lines thoroughly to remove metal debris and dirt. Replace fuel filter, injector copper washer and sealing ring. Check high-pressure fuel pump condition, because residual dirt and metal chips in oil circuit are the main reason for newly fitted injector early damage. Keep installation workspace clean to prevent dust entering high-pressure fuel circuit. After installation, check the aftertreatment system if needed.

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.

our warehouse

our warehouse

Pack and ship

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