original 387-9439 Diesel Pump Injector Sprayer 20R8968 387-9433 293-4072 3282572 for C9 Engine new injector original new injector

Built specifically for the C9 and C9 ACERT 8.8L inline 6-cylinder turbocharged aftercooled industrial diesel engine, this HEUI fuel injector delivers precise fuel metering, fine atomization, and controlled injection timing within the electronically controlled HEUI-family fuel system. As a direct replacement for OE 387-9439 and cross-references 20R-8061, 387-9432, 10R-7223, 328-2576, 293-4073, 254-4340, and 20R-8065, the injector restores balanced fuel delivery between cylinders, maintains the correct spray pattern, and helps recover combustion stability on heavy-duty equipment.

The unit is engineered for C9-powered excavators (330D, 330D L, 336D, 336D L), bulldozers, track-type tractors (D6R, D7R), loaders, motor graders (140M, 160M), wheel dozers (814F Series 2), soil compactors (815F Series 2), landfill compactors (816F Series 2), 973D, generator sets, marine auxiliary engines, and industrial power units. Each engine typically uses six injectors, and the component is supplied as a replacement-ready injector GP suitable for construction, mining, power generation, marine, agricultural, and industrial machinery applications.

Before installation, confirm the old injector number, engine serial number, and engine arrangement number, then clean the injector bore, fuel line, oil passage, and sealing surface, replacing seals and washers as required. Follow the official service manual for torque values, installation sequence, and any trim-code programming, then prime the fuel system and check for leaks, abnormal smoke, rough idle, misfire, fault codes, and cylinder balance issues.