Perkins Injector 3126 222-5966 2225966 Common Rail Fuel Injector For CAT 3126B 3126E 10R-0781 Diesel Injection Valves Original New Injector

Perkins 3126 Series Fuel Injector 10R-0781 Product Detail Page Description Product Overview The Perkins 10R-0781 / 10R0781 HEUI fuel injector is a diesel fuel injector replacement for selected Perkins 3126, 3126B, 3126E and C7 engine applications. It is commonly listed in the aftermarket as a remanufactured or replacement Hydraulic Electronic Unit Injector for Perkins medium-duty diesel platforms, with frequently referenced interchange numbers including 197-7107, 198-6605, 199-6065, 222-5966 and EX630781. Multiple diesel parts suppliers list 10R-0781 for Perkins 3126B / 3126 / C7 applications, while cross-reference lists commonly include the above replacement numbers. This injector is designed for engines using Perkins’s HEUI fuel system, where the Electronic Control Module controls injection timing and duration, while high-pressure engine oil provides the hydraulic force required to intensify fuel injection pressure. Perkins 3126 HEUI service documentation describes the system as electronically controlled and hydraulically actuated, using high-pressure oil, ECM commands, sensor inputs and individual unit injectors to optimize starting, warm-up, emissions, fuel economy, noise and drivability. Important fitment note: Always confirm by engine serial number, arrangement number, injector code, original injector number and ECM calibration before purchase or installation. Perkins injector families may look similar, but incorrect injector selection can cause misfire, excessive smoke, rough idle, low power, hard starting or engine damage.