0445120080 Common Rail Injector for Doosan Construction Equipment Engines
When it comes to maintaining peak performance of your Doosan construction equipment, the fuel injection system plays a critical role. The Bosch 0445120080 common rail injector is an OEM-quality replacement part engineered for precision, durability, and efficiency. Below we break down why this injector stands out, which machines it fits, common failure signs, installation tips,.
1. Structural Advantages of Bosch 0445120080 Injector
The 0445120080 injector features Bosch’s advanced common rail design, delivering multiple injection events per cycle for optimal combustion. Key structural benefits include:
High-precision solenoid valve – Enables extremely fast response times (microseconds) for precise fuel metering, reducing emissions and fuel consumption.
Hardened nozzle body – Made of high-grade stainless steel with anti-corrosion coating, resistant to cavitation and wear in harsh construction site conditions.
Multi-hole spray pattern – Optimized cone angle ensures homogeneous air-fuel mixture, reducing smoke and improving torque at low RPMs.
Leak-proof sealing – Integrated O-rings and clamping slots prevent fuel leaks and pressure loss, even under extreme thermal cycling (-30°C to 120°C).
Compatible with high injection pressures – Rated up to 2,000 bar (29,000 psi), meeting Euro III/IV emission standards for Doosan engines.
These features translate into longer service life, smoother engine operation, and lower operating costs.
2. Compatibility – Which Doosan & Engine Models Use 0445120080?
The Bosch 0445120080 injector is widely used in Doosan construction machinery powered by Doosan (formerly Daewoo) diesel engines, especially the DL06, DB58, DE12, DV11, and D1146T series. Common equipment includes:
| Equipment Category | Specific Models |
|---|
| Excavators | Doosan DX140, DX180, DX225, DX255, DX300, DX340, DX380, DX420, DX480 |
| Wheel Loaders | Doosan DL200, DL250, DL300, DL400, DL420, DL500, DL550 |
| Forklifts | Doosan D25G, D30G, D35G, D50G, D70G (with diesel engines) |
| Skid Steers | Doosan S70, S100, S175, S185, S250, S280, S300, S330, S510 |
| Articulated Dump Trucks | Doosan DA30, DA40 |
Cross-reference note: This injector is interchangeable with Bosch original part number 0445120080, as well as Doosan genuine part numbers 65.05501-0011, 65.05501-0011A, and 65.05501-0011B. Always verify your engine serial number before ordering.
3. Common Failures & Installation/Replacement Advice
🔧 Typical Failure Symptoms of 0445120080 Injector
Rough idling or misfire – Caused by worn nozzle holes or stuck solenoid.
Excessive black or white smoke – Improper spray pattern leads to incomplete combustion.
Hard starting or long crank time – Loss of injection pressure due to internal leakage.
Increased fuel consumption – Droop in injection quantity accuracy.
Engine knocking noise – Pilot injection malfunction.
Oil dilution (fuel in oil) – Leaking injector body past the O-rings.
🛠 Installation & Replacement Guidelines
Safety first – Depressurize the common rail system (engine off for >30 min, or use diagnostic tool to release pressure).
Remove old injector – Clean surrounding dirt, then use a proper injector puller – never pry with a screwdriver.
Replace all sealing components – New copper washers, O-rings, and clamp bolts (torque to spec: typically 40–50 Nm for clamp, 130–150 Nm for the injector body).
Lubricate O-rings – Use clean diesel or assembly lubricant before inserting into the injector bore.
Program IMA codes – After installation, use a diagnostic scanner to enter the injector’s IQA (Individual Quantity Adjustment) code (printed on the injector body) into the ECU. This is mandatory for common rail systems.
Bleed the fuel system – Prime the pump, crank engine without starting for 10–15 seconds, then start and check for leaks.
Calibration test recommended – If replacing multiple injectors, perform a rail pressure calibration via diagnostic tool.
⚠️ Do not reuse old copper washers or O-rings – this is the #1 cause of post-replacement failures.
4. Why Choose Rsolid Engine Parts as Your Supplier?
For reliable, tested, and competitively priced common rail components, Rsolid Engine Parts (website: www.rinjector.com) stands out:
Direct source – We supply genuine Bosch and high-grade aftermarket injectors with 100% bench-tested performance (spray pattern, leak test, and solenoid response).
12-month warranty – Peace of mind for construction fleet managers and repair shops.
Fast global shipping – From our China warehouse, express delivery to North America, Europe, Australia, Africa, and Middle East (3–7 days via DHL/FedEx).
Technical support – Our engineers provide installation guidance, IMA code explanation, and troubleshooting via WhatsApp +8618011765613.
Bulk discounts – For orders of 6+ injectors (common for full engine overhaul), contact us for volume pricing.
100% fitment guarantee – Wrong part? We exchange or refund within 30 days.
📞 Order or inquire today
Visit www.rinjector.com or WhatsApp +8618011765613 for a quote. We also supply matching common rail pumps, pressure sensors, and injector pullers for Doosan.
