original 20R-1270 Diesel Injector 20R1270 3920206 Replaces 392-0206 386-1758 10R-1288 for 5130B 5230B 3516B Engine new injector original new injector

Engineered exclusively for the 3500 Series platform, this fuel injector assembly is calibrated and dimensionally matched to the 3512B, 3516B, and 3508B engines used in power generation, marine propulsion, mining haul and shovel drives, and heavy oilfield installations. The primary OE reference 20R-1270 is fully cross-compatible with 392-0206, 386-1758, 250-1306, 229-0194, 162-8809, 132-0202, 126-7992, 116-7534, 10R-1288, OR-8688, and OR-8891, allowing fleet operators to consolidate part numbers without sacrificing engine-specific performance. Each unit is built with corrosion-resistant, wear-tolerant materials to meet factory tolerances.

As an Electronic Unit Injector (EUI), the assembly combines the high-pressure pumping element and the nozzle into a single precision-machined unit, delivering consistent injection pressure, a tight spray pattern, and stable atomization across the full load range of the 3512B platform. This results in improved fuel economy, lower exhaust emissions, and dependable power output for standby gensets, prime-rated generator packages, and continuous-duty marine and mining engines operating in harsh environments worldwide.

Before installation, technicians should confirm the engine serial number and injection configuration, drain residual fuel, clean the injector bore, replace all copper and sealing washers, and torque to manual specifications. An ECU signal and pressure test should follow to verify correct injector operation. Available in new OEM, remanufactured, and aftermarket conditions, each injector is quality-control inspected and tested, offering a reliable OEM-equivalent replacement that reduces downtime for 3500 Series operators across Power Gen, Marine, Mining, Oil & Gas, and Industrial Manufacturing sectors.