Caterpillar original 0R-0471 Common Rail Diesel Fuel Injector Replacement for OEM 3116 Engine, Fits 320B 322B 325B E325B Excavator, Replaces 9Y-4982 original new injector

The Caterpillar CAT 3116 fuel injector 0R-0471 is a precision-engineered mechanical unit injector designed for the inline six-cylinder 4-stroke CAT 3116 diesel engine. Built with a hardened multi-hole sacless nozzle and a mechanical plunger, barrel, and spring assembly, this injector delivers accurate fuel quantity and timing in direct response to camshaft motion. Precision machining and the use of thermal- and wear-resistant materials ensure consistent atomization, durability under high cylinder pressures, and compliance with OEM tolerances across a power output range of approximately 205 to 350 HP.

This injector carries broad cross-reference compatibility, covering 0R-0471, OR-0471, 4P-9077, 9Y-4982, 101-4561, 127-8205, 0R-3389, 0R-8467, 0R-8682, 127-8220, 4P-2995, 7E-8952, 105-1694, 7E-8727, 162-0212, and 127-8230, simplifying sourcing and interchange for fleet operators and rebuilders. It supports CAT excavators such as the 200B, 205B, 320B, 322B, and 325B, the 446B backhoe/loader, medium-duty trucks, marine installations, generator sets, and industrial equipment including pumps and compressors serving construction, mining, truck and transit, marine, and industrial generator markets.

Proper installation requires confirming the part number, engine serial, and CPL arrangement, cleaning the bore, and replacing O-rings, seals, and precision washers before torquing to CAT specifications and verifying seating height with a dial gauge. The fuel system should be primed to clear trapped air, and the engine monitored afterward for leaks, idle stability, smoke, and load response. Routine maintenance—clean diesel, scheduled filter changes, water-separator drainage, and periodic bench testing of pop pressure and spray pattern—helps prevent hard starting, rough idle, black smoke, low power, and fuel leaks associated with worn or leaking injectors.