Perkins original  10R-0781 Diesel Fuel Injector for Cat 3126 3126B C7 3126E Engine 324D 325C 325D 329D 330C Excavator Spare Part 20R-8758 196-4229 new original new injector

The Perkins 10R-0781 HEUI fuel injector is engineered for the Perkins 3126, 3126B, 3126E and C7 7.2L inline-six medium-duty diesel platform, serving as a direct replacement for OE part 10R-0781 and an extensive list of cross-references including 197-7107, 198-6605, 199-6065, 222-5966, EX630781, 222-5926 and the CA-prefixed equivalents. Within the HEUI system, the ECM precisely governs injection timing and duration while high-pressure engine oil supplies the hydraulic force required to pressurize fuel inside the injector body, demanding tight manufacturing tolerances and reliable electronic actuation.

Designed for broad vocational coverage, this injector supports medium-duty trucks, school buses, motorhomes, marine engines, fire trucks, cranes, construction equipment, industrial power units, forklifts, agricultural machinery, compressors, drilling, crushing, forestry, hydraulic power units, irrigation, mining, paving, pumps, trenchers and similar diesel applications commonly served by Freightliner, Ford, GM, International, Kenworth and Western Star. A complete 6-cylinder engine service requires six injectors, making the part well suited to fleet maintenance and remanufacturing programs.

When properly installed with clean fuel, correct engine oil, fresh filters, new seals and O-rings, and verified with diagnostic equipment, the injector helps restore fuel control, throttle response, cold starting, fuel economy and emissions performance, addressing common symptoms such as rough idle, misfire, hard starting, low power, excessive smoke, abnormal fuel consumption and injector-related fault codes.