Cummins 3939826 / 3939826RX Diesel Injector - Fit for 4B3.9/B4.5/B5.9/QSB Engine Series - Bosch 0432191355
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| Product Name | Diesel injector assembly (including nozzle and injector body) |
| Manufacturer | Cummins / Bosch |
| Original Part Number | 3939826 / 0432191355 |
| Applicable Engine Series | 4B3.9, B4.5, B5.9, B6.7, ISB, QSB |
| Injector Type | Mechanical Injector (non-electronic high-pressure common rail) |
| Nozzle Model | Bosch P-type porous nozzle |
| Applicable Fuel | Diesel |
| Installation Thread | M14×1.5 |
| Working Pressure Range | 1800 - 2200 bar (Pump End Pressure) |
| Fuel Connection Tube Fitting | F00ZR20002 (Sold Separately) |
| Matching Seal | O-ring 3029820 (to be replaced during installation) |
| Warranty | 12 months (Original Equipment/Cummins ReCon Products) |
Manufacturer No.
04321913550 432 191 355
OEM Part No.
39398263939826RX3939826PX3939826NX
Engine Part No.
4B3.9B4.5B5.9B6.76B5.9ISB6.7ISD4.5QSB5.9QSB6.7ISF2.8ISF3.86BTA5.94BT6BT
Interchange No.
39396953939695RX3939695PX3939695NX9826
Fitment Vehicles
Caterpillar 320D Series Excavator (equipped with Cummins engine)Hyundai R290LC-7 ExcavatorLoaders, bulldozers, generator sets, agricultural machinery of various brands
Fuel System - Industrial Encyclopedia
Purchase Cummins 3939826 Original and Compatible Injectors, suitable for 4B3.9, B4.5, B5.9, B6.7, ISB6.7, QSB5.9 and QSB6.7 diesel engines. This part is manufactured by Bosch (Bosch), OEM number 0432191355. As a core component of the fuel system, the injector is responsible for precisely injecting high-pressure diesel into the combustion chamber, ensuring engine power output and fuel economy. Suitable for a variety of applications including construction machinery, agricultural tractors, generator sets, and heavy trucks. Offers Cummins Genuine, Bosch, and equivalent remanufactured (3939826RX) options to meet different budget requirements.