Perkins original Perkins 10R-1306 Diesel Fuel Injector Assembly 3126B 3126 C7 3126E HEUI Replacement for 222-5968 177-4754 new injector original new injector

The Perkins 10R-1306 is a remanufactured HEUI diesel fuel injector designed as a direct OE-style replacement for the Perkins 3126 engine family, including 3126, 3126B, 3126E and compatible C7 configurations. It operates within the Hydraulic Electronic Unit Injector system, where the engine ECM precisely manages injection timing and duration while high-pressure engine oil provides the hydraulic actuation force. Low-pressure fuel is delivered through the cylinder head passages, supporting stable rail pressure and consistent injection events across all six cylinders. Each unit is built to meet original equipment specifications, helping restore factory-level fuel atomization, cylinder-to-cylinder flow balance and overall combustion stability.

This injector is engineered for heavy-duty commercial and industrial use, delivering reliable power recovery, reduced diesel smoke and improved throttle response in demanding operating environments. It is widely applied in trucks, buses, construction equipment such as Perkins 120H and 135H motor graders, marine propulsion engines, generator sets and agricultural machinery. The part is suitable for diesel repair shops, fleet maintenance programs, engine rebuild projects, marine service providers, mining fleets, export wholesalers and B2B industrial distributors. Both single-unit and complete six-piece engine set options are available to match individual cylinder service or full engine overhaul requirements.

Proper installation and maintenance are essential to maximize service life. Operators should always use clean diesel fuel, replace fuel filters on schedule, maintain correct engine oil pressure and drain the water separator regularly. Before replacement, scan the ECM for fault codes and inspect the injector harness and connectors. In cold conditions, allow adequate warm-up to stabilize HEUI actuation pressure. Remanufactured units should remain in sealed packaging until installation, and core returns must be properly protected to preserve core credit value.