Caterpillar original Diesel Common Rail Injector 127-8218 for 3114 3126 3216 Excavator CHALLENGER 35 CHALLENGER 45 Replaces 127-8216 1278218 4P-2995 original new injector

The Caterpillar CAT 3116 3126 mechanical fuel injector with OE number 127-8218 / 1278218 is a Mechanical Unit Injector (MUI) component engineered for reliable performance in heavy-duty diesel applications. Featuring an 8 mm plunger and a purely mechanical design, this injector is built to support accurate fuel metering and stable combustion within the mechanical fuel injection system, making it a dependable replacement solution for engine repair, injector replacement, and full engine overhaul operations.

This injector is widely used across multiple CAT equipment platforms, including the 950G, 960F, and 962G wheel loaders, the IT62G integrated toolcarrier, the 525B and 535B skidders, TK370, TK371, TK380, and TK381 forestry machines, as well as CAT 533, 543, 570, and 580 forestry equipment and Challenger 35, 45, and 55 tractors. It is fully compatible with Caterpillar CAT 3116 and CAT 3126 diesel engines equipped with the mechanical MUI injection system, while it is not intended for electronic common rail configurations.

Serving diesel repair shops, remanufacturing suppliers, heavy equipment fleets, and global parts distributors, this 127-8218 / 1278218 mechanical injector is cross-referenced with 0R-8684, 107-7735, 156-5023, 20R-2052, and DS-127-8218 to simplify sourcing. To ensure correct fitment, buyers should verify the original injector number, engine model and serial number, fuel system type, and equipment model prior to ordering or installation, with final compatibility confirmed through engine serial number, injection system type, and original injector number.