Caterpillar original  127-8216 Mechanical Fuel Injector for 3114 3116 C3116 Engine, E320B E322B E325B Excavator Diesel Parts Replacement new original new injector

The CAT 3116 3114 mechanical fuel injector 127-8216 / 0R-8682 is a heavy-duty 8 mm plunger unit injector designed for Caterpillar diesel engines used in excavators, wheel loaders, motor graders, asphalt pavers and industrial equipment. Built as a Cat Dual Scroll Unit Injector reference, it delivers stable injection pressure, accurate fuel metering and consistent atomization to support correct timing, balanced cylinder delivery and reduced exhaust smoke under load. Compatible references 127-8218, 107-7735, 156-5023, CA1278216, CA0R8682, 127-8222, 127-8213, 127-8205, 390074X, PAI 390074X and M-1278216 extend cross-reference coverage for service and inventory matching.

Engineered for construction-grade durability, this injector is available as a single piece, set of 6, or reman exchange unit to suit dealer, fleet and rebuilder sourcing needs. The OE-style calibration helps restore fuel economy, throttle response and cold-start performance, while the robust mechanical construction withstands high-cycle industrial operation. Fitment must be confirmed by engine serial number, arrangement number, machine model and old injector part number to avoid wrong-part risk, and additional applications including 3116DIT, 3126, 3126B and selected C7 configurations should be verified against injector calibration.

Recommended installation practice includes replacing the fuel filter, draining the water separator, cleaning the injector bore and sleeve, fitting new O-rings and sealing washers, lubricating seals with clean diesel, and torquing to Caterpillar service manual specifications with proper injector height adjustment. After installation, bleed air from the fuel system and check idle quality, smoke, fuel leakage and load response. When multiple injectors show wear, full set replacement is advised to maintain cylinder balance and combustion stability.