Product Name: Diesel High-Pressure Fuel Injection Pump Assembly (Common Rail Fuel Pump)OEM Part Number: 6217-71-1121DENSO OE Number: 094000-0322Compatible Engine: Komatsu SA6D140E-3 Series EnginesApplicable Models:
Excavators: PC600-7
Wheel Loaders: WA500-3HOEM Manufacturer / Origin: Manufactured by DENSO, Japan
| Item | Specification |
|---|---|
| System Type | Common Rail Fuel Injection System |
| Maximum Operating Pressure | Approx. 1600 bar (Tier 3 / China Stage III compliant) |
| Control Method | Electronically controlled solenoid with fuel metering unit |
| Drive Type | Engine timing gear drive |
| Compatible Fuel | Diesel (compliant with China Stage III and above emission standards) |
| Mounting Type | Cylinder head / engine front flange mounting |
Main Functions & Advantages
Stable High-Pressure Fuel Supply: As the core component of the engine fuel system, it pressurizes diesel to high pressure and supplies stable high-pressure fuel to the injectors, ensuring combustion efficiency and power output.
Precise Flow Control: The DENSO-designed fuel metering unit precisely controls fuel delivery. Combined with the ECU, it enables multi-stage injection strategies to reduce fuel consumption and black smoke emissions, meeting Tier 3 / China Stage III emission standards.
Heavy-Duty Durability: OEM precision-machined to match Komatsu 6D140 heavy-duty engines, built to withstand long-term high-pressure, high-load conditions in mining, earthmoving, and construction applications, with excellent wear and corrosion resistance.
Perfect Compatibility: Developed specifically for models including the PC600-7, fully compatible with engine ECU programming and injector data. No additional calibration is required after installation.
Cross-Reference & Replacement Information
Komatsu Genuine Part Number: 6217-71-1121 (Genuine Part)
DENSO OE Number: 094000-0322
Market Replacement Options:
Remanufactured Units: Rebuilt units of the same model (must match OEM injection curve data)
Aftermarket Units: Domestic alternative high-pressure pumps (must verify compatibility and data matching)
5. Application Scenarios & Installation Guidelines
Typical Applications: Heavy-duty construction machinery environments including mining, large-scale earthmoving, and infrastructure projects.
Installation Notes:
Clean the fuel lines and pump body thoroughly before installation to prevent debris from entering the high-pressure system and causing wear or blockage.
Replace the fuel filter and sealing gaskets simultaneously to prevent fuel leakage.
After installation, use a dedicated Komatsu diagnostic tool to perform high-pressure pump initialization matching and fuel supply curve calibration.
Use only qualified diesel fuel. Low-quality fuel will directly cause pump plunger wear and metering unit sticking, resulting in insufficient engine power or failure to start.
Quality Grade Description
Genuine OEM Parts: Manufactured by DENSO Japan, supplied with Komatsu original packaging and anti-counterfeit labels. Warranty typically 6 months / 2000 hours (subject to manufacturer policy).
Remanufactured Units: Refurbished original pumps, fully disassembled, cleaned, with core components replaced, high-pressure tested, and recalibrated. Performance is close to OEM standards with higher cost performance.
Aftermarket Units: Domestic alternative parts at lower cost. Select qualified suppliers with matched injection data to avoid engine faults caused by parameter mismatches.
