original 173-9379 Diesel Fuel Injector Nozzle Assembly for 3126 3126B 3126E Engine Excavator Truck Replacement for OEM 1739379 173-1012 0R-9348 original new injector

Engineered for heavy duty 3126, 3126B and 3126E platforms, this 173-9379 HEUI fuel injector delivers precise fuel metering and dependable atomization across the full engine load range. Manufactured from high strength alloy steel and validated to OEM equivalent standards, the assembly offers reliable service in construction, mining, marine, power generation and commercial transportation applications where sustained performance is critical.

The injector operates on hydraulically actuated, electronically controlled unit injection technology. Engine oil pressure is first converted into hydraulic force, then multiplied by the intensifier piston to raise fuel pressure. ECM signals command injection timing and quantity, while the precision nozzle atomizes diesel into microscopic droplets for efficient combustion. The result is improved combustion efficiency, reduced fuel consumption, lower emissions, faster throttle response and extended engine life. Cross-reference numbers include 0R9348, OR9348, EX639348, 145-9360, 155-1819, 157-3727, 173-1012, 173-4566, 188-1320 and 222-5965, ensuring wide interchangeability with original service parts.

Hardened internal components provide corrosion resistance suitable for harsh industrial and marine duty cycles. During installation, always replace sealing components, clean the injector bore, verify fuel rail cleanliness, and perform ECM diagnostics after fitment. Supplied with a 12-month warranty, this injector is a proven replacement solution for OEM fleets, aftermarket distributors and workshops servicing 3126 series engines worldwide.