Caterpillar original High Precision Diesel Fuel Injector for Excavator, 249-0746, 250-1311, 20R0849, Replacement for OEM 250-1304, fits 3512B 3516B 3512C C3500 Diesel Engines original new injector

For global distributors, engine rebuilders and maintenance contractors serving heavy-duty operational sectors, the Caterpillar 250-1311 high-pressure diesel fuel injector is a mission-critical replacement component built to OEM engineering standards for CAT 3500 series engines. As a core component of the fuel injection system, it governs precise fuel metering and high-pressure atomization, directly impacting combustion quality, power output, fuel economy, emissions compliance and long-term engine reliability. It delivers consistent performance across both low-annual-use standby generators and 24/7 continuous-operation prime power units.

This injector is compatible with a broad range of CAT 3500 series engine configurations, including 3512B, 3512C, 3516, 3516B, 3516C and 3508 models, with verified cross-reference part numbers to simplify part matching. It features micron-tolerance CNC-machined bodies, multi-hole nozzle technology, heat-treated wear-resistant internal components and corrosion-resistant materials, which optimize fuel spray uniformity, reduce fuel consumption, improve transient load response and support thousands of operating hours under heavy industrial workloads.

It is engineered for deployment across power generation, marine, mining, oil & gas and general industrial applications, covering equipment ranging from backup generator sets and marine propulsion systems to mining machinery and industrial pumping stations. As a brand-new OEM-spec replacement part, it comes with a 12-month warranty, helping buyers reduce unplanned downtime risks and lower long-term operational costs for high-value heavy-duty assets.