Caterpillar original Injector Control Valve for C7 C9 HEUI 324D 325D 330D 336D E330D E336D Excavator Common Rail Fuel Injector OEM 387-9433 replacement original new injector

The Caterpillar C9 C9 ACERT fuel injector 387-9433 is engineered for precision fuel metering in HEUI and MEUI electronic unit injector systems used on heavy-duty Caterpillar platforms. It delivers pressurized diesel fuel into the combustion chamber at the correct timing, quantity, and spray pattern, converting it into a fine atomized mist that improves air-fuel mixing, supports clean combustion, stabilizes idle quality, and maintains engine torque under heavy load. A stable spray pattern and durable body construction allow reliable operation under high vibration, high temperature, variable load, contaminated jobsite conditions, and long service intervals.

This injector covers a broad range of cross references including 10R-7222, 20R-1917, 20R-8064, 20R-8968, 557-7633, 553-2592, 293-4072, 328-2574, 267-3360, 254-4339, 572-0119, and 254-4340, supporting flexible replacement for excavators 330D, 336D, 336D2, 340D, 340D2, wheel tractor scrapers 627G and 637 series, compactors 815F II and 816F II, motor graders 140M and 160M, track loader 973C, and additional construction, mining, petroleum, forestry, and industrial power equipment. Each unit is flow-tested for performance consistency and supplied in export-ready packaging with reman and new options available.

Before installation, confirm the part number, engine serial number, and machine model, then clean the fuel system, replace fuel filters, install new seals, follow Caterpillar torque specifications, and perform injector calibration or trim-code programming where required. After installation, test for leakage, smoke, idle stability, fault codes, and power output. Routine maintenance with clean diesel fuel, regular filter replacement, water separator draining, injector tip inspection, and periodic cylinder balance testing helps sustain balanced engine performance and service life.