Caterpillar original Diesel Fuel Injector 250-1312 Replacement for OEM 10R-1290 Cross Reference 359-5469 Fits 3512B 3516B Engines for Heavy Construction Machinery with 250-1311 original new injector

Purpose-built for Caterpillar heavy-duty power platforms, the 250-1312 original diesel fuel injector is a genuine CAT OEM component matching factory performance specifications. Its primary OE number is 250-1312 (alternate format: 2501312), with verified cross-references including 10R-1275, 20R-0849, 162-8813, 204-2067, 229-1631, 245-8272 and 246-1854. It fits the Caterpillar 3512B diesel engine family and related 3512 industrial, marine and power generation models; 3516 interchange requires official OEM validation. It supports equipment across power gen, marine, mining, oil & gas, construction and emergency backup sectors worldwide.

Compatible with the 3512B’s high-precision electronic unit injection system, this injector receives high-pressure diesel, meters exact volumes per ECU commands, and atomizes fuel via fine nozzles to enable efficient direct combustion. This design maximizes power output while lowering fuel consumption and exhaust emissions. Its corrosion-resistant materials and strict OEM-standard build quality deliver extended reliable performance in harsh industrial environments, with precision metering and atomization ensuring consistent combustion efficiency.

For correct installation, technicians must clean fuel lines thoroughly, replace all seals, follow Caterpillar torque specifications, complete required ECU injector coding, and run post-install fuel pressure tests to confirm proper seating. Routine maintenance covers scheduled fuel filter changes, injector leak tests, pressure checks, balance evaluations and fuel contamination monitoring. Common faults like hard starts, abnormal smoke, rough idle and unstable power indicate wear, leakage, spray pattern deviation or clogging, diagnosable via pressure and balance tests.