Perkins original  155-8723 Diesel Fuel Injector Common Rail for CAT 3126 3126B 218-4109 128-6601 173-9272 186-3410 169-7411 original new injector

The Perkins 3126 diesel injector with OE part number 155-8723 is engineered as a direct OEM replacement for Perkins 3126, 3126B, 3126E, and C7 diesel engines fitted with the HEUI fuel system. This electronic unit injector operates at high pressures of 1350–1600 bar, delivering precision fuel metering and fine atomization for consistent combustion across demanding industrial applications. The multi-hole nozzle design and precision-machined steel components ensure reliable spray pattern quality, long service life under high thermal and mechanical stress, and corrosion-resistant durability in harsh operating environments.

This injector carries full OE-certified performance compatibility with Perkins 3126 engines and is fully interchangeable with authorized cross reference numbers including 1558723, 0R-8742, 0R-8743, 20R-5392, 169-7408, 178-6342, 111-7916, 0R-9350, 173-9272, 196-1401, 218-4109, 128-6601, 4CR0197, 232-1167, 222-5972, 2C0273, 153-5938, 155-1819, 20R-0758, 232-1171, Bosch 0445110130, and Delphi 9308-621C. Vertical direct-injection orientation, high-grade steel alloy construction, and engine-specific calibration make this injector suitable for construction equipment, heavy trucks, medium-duty and vocational vehicles, excavators, wheel loaders, backhoe loaders, compactors, industrial power units, diesel generator sets, agricultural equipment, and mining support machinery.

Recommended maintenance includes inspecting the injector every 500 operating hours, replacing injector seals and O-rings during service, performing bench testing for fuel spray pattern and leakage, and using Perkins-approved diesel fuel and lubricants. Common fault symptoms such as hard start, engine misfire, excessive black or white smoke, rough idle, loss of power, poor fuel economy, and diagnostic trouble codes can be addressed through fuel pressure testing, HEUI oil pressure testing, injector leakage testing, cylinder cut-out testing, injector balance testing, harness inspection, ECM scan, and return flow testing. Quality-controlled assembly and technical verification support are provided for global distribution across North America, Europe, Asia, Australia, South America, the Middle East, and Africa.