Weifu 4P-2995 Fuel Injector Assembly

The 4P-2995 is a mechanical unit injector (MUI) designed for Caterpillar 3114, 3116, 3126, and C7 diesel engines. It utilizes camshaft-driven actuation to deliver high-pressure fuel directly into the combustion chamber without electronic control. The injector body is constructed from high-strength alloy steel to withstand cyclic combustion pressures and abrasive fuel contaminants. Internal components include a precision-machined plunger and barrel assembly, a spring-loaded needle valve, and a multi-hole nozzle tip calibrated for specific spray angle and penetration. This unit replaces Caterpillar OEM part numbers 0R-8471, 7E-8952, 7E-8727, and 127-8225. It is a non-electronic, hydraulically/mechanically actuated component requiring no ECU programming. Installation requires standard torque specifications for the hold-down clamp and high-pressure fuel line connections. Quality validation includes pop pressure testing, leak-down verification, and spray pattern analysis per ISO 9001 standards.