Caterpillar original Engine Fuel Injector 250-1313, 376-0509 for Caterpillar 3512, 3516, 3512B, 3516B, 3516C, C12, Replacement for OEM 20R-1269, 10R-1285 for Excavator, Truck original new injector

The Caterpillar 250-1313 Fuel Injector Assembly is a precision-engineered diesel fuel injection component developed exclusively for CAT 3512B engines operating in high-demand industrial environments. Built to align with original Caterpillar fuel system specifications, this heavy-duty electronic unit injector functions as a qualified OEM remanufactured replacement part for mission-critical assets across power generation, marine propulsion, mining, offshore platform, oilfield power, and industrial compression use cases.

Equipped with a precision-manufactured nozzle and advanced internal flow control design, the injector delivers accurately metered fuel, optimized atomization, and stable high-pressure delivery across the engine’s full operating range. These capabilities support consistent spray patterns, even combustion chamber distribution, thorough air-fuel mixing, reduced fuel consumption, lower particulate and black smoke emissions, improved engine responsiveness, stable idle performance, enhanced cylinder balance, and extended engine service life, while cutting long-term maintenance costs.

Each 250-1313 assembly completes comprehensive pre-shipment testing, including performance validation, leak checks, pressure verification, flow balancing, spray pattern analysis, and dimensional inspection. Installation requires adherence to official CAT service manual protocols: teams must verify the OEM number and engine model beforehand, clean fuel rails, replace sealing components, use dedicated seating tools and specified torque values, and conduct post-installation leak, fuel pressure, and cylinder balance tests to confirm reliable operation.