Caterpillar original  250-1312 Diesel Fuel Injector 20R-3477 10R-1275 High Pressure Nozzle for 3512B 3516B Engine Heavy Construction new injector original new injector

The Caterpillar 250-1312 fuel injector is engineered as a direct OEM replacement for the CAT 3512B V12 turbocharged and aftercooled diesel engine, delivering precise fuel metering and high-pressure atomization for optimum combustion efficiency. Designed to match original equipment specifications, this injector supports consistent spray patterns and accurate fuel delivery across heavy-duty generator sets, marine propulsion systems, and industrial power units operating in demanding environments.

Manufactured with corrosion-resistant materials and built to OEM standard quality, the 250-1312 injector provides extended service life under harsh industrial conditions including high temperatures, vibration, and continuous load operation. It is fully interchangeable with cross reference numbers 10R-1275, 20R-0849, 162-8813, 204-2067, 229-1631, 245-8272, 246-1854, 250-1311, 250-1302, and 386-1758, allowing flexible substitution across compatible 3512 and select 3516 engine platforms used in power generation, marine, mining, oil and gas, construction, and emergency backup applications.

Routine maintenance protocols recommend scheduled fuel filter replacements, injector leak tests, fuel pressure checks, injector balance evaluations, and contamination monitoring to sustain reliable engine performance. Symptoms such as hard starts, irregular smoke patterns, rough idle, and unstable power output often indicate injector wear, leaks, or clogging, which can be confirmed through pressure and balance diagnostics. The 250-1312 injector offers a dependable OEM-grade solution for operators maintaining Caterpillar 3512B engines worldwide.