Caterpillar original  0R-0471 diesel fuel injector replacement for OEM common rail system  original new injector

The Caterpillar 3116 fuel injector 0R-0471 is a mechanical unit injector (MUI) engineered for the CAT 3116 inline 6-cylinder 4-stroke diesel engine, with a displacement of approximately 6.6 liters and an output range of 205 to 350 HP. The injector relies purely on mechanical operation, using a plunger, barrel, and spring assembly driven directly by the camshaft to control fuel delivery timing and quantity, ensuring consistent metering without electronic dependencies. The multi-hole sacless nozzle is precision-machined to disperse fuel into a fine, uniform spray pattern for efficient combustion across varying load conditions.

Built for heavy-duty service, the injector features hardened nozzle tips, wear-resistant internal components, and thermal-stable materials that maintain calibration under prolonged thermal cycling. Manufacturing conforms to OEM tolerances, with rigorous inspection of pop pressure, spray pattern, and back-leakage. The broad cross-reference coverage supports convenient sourcing for fleet operators, rebuild shops, and distributors servicing multiple CAT 3116 platforms across global markets.

Field maintenance is straightforward: operators should use clean diesel fuel, follow scheduled fuel filter replacement intervals, drain the water separator regularly, and perform periodic injector bench testing to verify pop pressure and spray pattern. This injector is a direct-fit replacement solution for CAT excavators such as the 200B, 205B, 320B, 322B, and 325B, the 446B backhoe loader, medium-duty trucks, marine installations, generator sets, and industrial machines including pumps and compressors.