original 557-7633 Diesel Fuel Injector 5577633 263-8218 328-2574 10R-7222 for C7 C9 Engine E330D E336D Excavator Replacement for OEM 387-9433 original new injector
Fuel Type | Diesel |
Condition | New / Remanufactured (OEM Quality) |
Applicable Engine | . C9 engine platform |
Injector Type | HEUI (Hydraulic Electronic Unit Injection) |
Quality Standard | OEM Specification Compliant |
Packaging | Industrial protective packaging |
Fuel System | HEUI fuel delivery using engine oil pressure, ECM electronic control, high-pressure fuel delivery, precision nozzle atomization, multiple injection events per combustion cycle |
OE Number | 557-7633 |
Brand | . |
Cross Number / Universal Number | 557-7633, 5577633, 10R-7221, 10R7221, 20R-8968, 20R8968, 20R-8064, 20R8064, 387-9434, 3879434, 293-4071, 2934071, 328-2573, 3282573, 267-9734, 2679734, 241-3218, 254-4339, 553-2592, 557-7637, 387-9436, 387-9437 |
Vehicle / Equipment Application | Excavators: 330D, 330DL, 330D LN, 336D, 336DL, 336D2, 340D, 340DL; Wheel Loaders: 950H, 966H, 972H; Industrial Power Units, Compressor Packages, Water Pump Units, Generator Sets, Mining Equipment, Oilfield Equipment, Marine Auxiliary Systems |
Application Type | Construction, Mining, Energy / Power Generation, Marine Auxiliary, Oil & Gas Field Equipment |
Engineered as a direct-fit replacement for the . C9 diesel engine platform, the 557-7633 HEUI fuel injector delivers reliable high-pressure fuel atomization for severe-duty construction, mining, marine, and stationary power applications. It cross-references OE identifiers 10R-7221, 20R-8968, 20R-8064, 387-9434, 293-4071, 328-2573, 267-9734, 241-3218, 254-4339, 553-2592, 557-7637, 387-9436, and 387-9437, giving fleet operators and rebuilders broad sourcing compatibility for 330D, 336D, 336D2, 340D excavators, 950H, 966H, 972H wheel loaders, generator sets, and industrial power units.
Built with CNC-machined injector bodies held to micron-level tolerances, high-strength alloy steel components, precision-ground needle valves, and a multi-hole nozzle, this injector optimizes atomization and combustion efficiency under continuous high-load operation. Advanced surface treatment enhances corrosion resistance, while full ECM electronic control compatibility supports multiple injection events per cycle. Operational benefits include improved fuel economy, lower emissions, reduced combustion noise, higher power output, and better cold-start performance across demanding duty cycles.
Recommended service practice includes inspecting fuel system cleanliness, replacing fuel filters, fuel lines, O-rings, and the copper sealing washer, applying approved assembly lubricant, and torquing per the . service manual. After installation, prime the fuel system, verify injector balance rates, check for leaks, run an ECM diagnostic scan, and complete a load test to confirm performance.
Contact Detail:
ADD:Huangpu hinery City, No.585-A, No.138, Southeast Road, Huangpu District, Guangzhou City,
Guangdong Province Tel:+86 020 88557755
Cellphone:+86 18136531233 WhatsApp:+86 18136531233
Email:2209396088@qq.com
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original 557-7633 Diesel Fuel Injector 5577633 263-8218 328-2574 10R-7222 for C7 C9 Engine E330D E336D Excavator Replacement for OEM 387-9433 original Images
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