Caterpillar original Common Rail Fuel Injector 387-9439 172-5780 236-0957 557-7634 Diesel Fuel Injector Replacement Compatible with Diesel Pump Injector Sprayer original new injector

Engineered for Caterpillar C9 diesel engine platforms, the 387-9439 HEUI fuel injector group is a precision heavy-duty fuel system component built for reliable operation across demanding industrial use cases. It delivers accurately metered, atomized diesel fuel with controlled injection timing to stabilize combustion and sustain rated power output, and is compatible with modern low-sulfur and low-lubricity diesel formulations. This offering is tailored for B2B buyers including diesel repair shops, fleet operators, parts importers, distributors, and maintenance teams.

This injector is designed for Caterpillar C9 and C9 ACERT 8.8L inline six-cylinder 4-stroke turbocharged aftercooled diesel engines, for use across construction, mining, power generation, marine, industrial, and forestry equipment. It fits verified C9-powered machines including excavators, motor graders, wheel dozers, compactors, and generator sets, with common models including CAT 330D, 336D, D6R, and 140M. Compatibility must be confirmed via engine serial number, machine model, original injector part number, and engine arrangement number prior to ordering, as related C9 family part numbers are not universal replacements.

Subject to inventory availability, the 387-9439 injector can be supplied as original type, OEM equivalent, new aftermarket, remanufactured, rebuilt, or exchange units to suit varied budget and repair needs. A standard C9 engine uses 6 injectors for full replacement, but single units are available for individual cylinder repairs. Purchasers must complete full parameter verification before ordering to avoid mismatched parts and unplanned downtime.