Caterpillar original Caterpillar 250-1303 diesel fuel injector replacement for OEM 3112 3114 3116 engine spare part new injector original new injector

The CAT 250-1303 fuel injector is engineered as a direct OEM replacement for the Caterpillar 3512B diesel engine, with confirmed compatibility across the CAT 3508B and 3516B models within the 3500 Series platform. Built to OEM-level manufacturing tolerances, the injector assembly utilizes heavy-duty, wear-resistant and heat-resistant materials that withstand continuous operation in harsh industrial environments, including offshore marine atmospheres where corrosion resistance is essential. Precision-machined internal components deliver consistent fuel metering and superior atomization, supporting stable combustion, optimized fuel economy, and reduced exhaust emissions across prime power, continuous duty, and emergency backup generator applications.

This injector carries a comprehensive cross-reference set — 250-1303, 2501303, 392-0226, 229-0202, 172-4677, 392-0211, 10R-1276, 0R-9796, 250-1302, 250-1304, 250-1306, 392-0200, 392-0202, 392-0225, 386-1776, 437-7547, and 246-1854 — simplifying sourcing for fleet operators, distributors, and service workshops worldwide. The unit is suitable for generator sets, marine propulsion and auxiliary engines, mining power modules and haul truck power systems, land drilling rigs, offshore platforms, compressor stations, and large excavators. High temperature stability and long service life make it a dependable choice for global B2B applications.

Routine maintenance is straightforward: fuel filter inspection every 250 hours, full fuel system inspection every 500 hours, injector performance inspection every 1000 hours, and bench testing at every major overhaul. Standard diagnostic procedures — flow test, return flow test, leak test, nozzle inspection, cylinder balance test, and fuel pressure test — confirm ongoing performance. Buyers should verify the engine arrangement number and serial number before purchase to ensure correct fitment for the CAT 3500 Series application.