original 350-7555 317-5278 212-3467 Diesel Fuel Injector for C10 C12 Engine, Construction Machinery new injector original new injector

Engineered specifically for C10 and C12 diesel platforms, the 350-7555 fuel injector delivers precision fuel metering and consistent atomization required by these high-output industrial engines. Developed as a direct OE-type replacement, it supports stable idle quality, restored engine power, and improved fuel economy under the heavy load cycles typical of excavator, loader, articulated truck, and mining operations. Compatibility extends across the 345B, 365B, 725, 730, 972G II, W345B II, R1600G, and Challenger MT-series equipment, allowing fleet operators to standardize service parts across mixed C10 / C12 powered machinery used in continuous-duty industrial environments, generator sets, and marine applications. The injector is validated for high temperature operation, vibration resistance, and variable fuel quality, including modern low-sulfur, low-lubricity diesel.

The cross reference numbers 20R-0056, CA3507555, and CAT3507555 simplify sourcing for replacement of the original 350-7555 unit, and the component is qualified for use with some 3176 and 3196 engine applications according to aftermarket fitment data. Each injector is produced to meet dimensional and performance tolerances, supporting reliable combustion and balanced cylinder contribution for demanding field service. The assembly is intended for straightforward installation using genuine service procedures, including replacement of seals and O-rings and application of the official torque values during injector seating.

Routine maintenance is critical to injector longevity. Operators should use clean diesel, replace fuel filters on schedule, drain the water separator, and keep the fuel tank free of contamination. Injectors must remain in sealed packaging prior to installation, and must not be dropped, opened, modified, or exposed to dust. After replacement, monitoring engine oil condition, exhaust smoke, idle quality, and diagnostic codes helps verify correct function. Common fault indicators—hard starting, rough idle, black or white smoke, power loss, elevated fuel consumption, engine knock, fuel dilution, excessive return fuel, misfire, high exhaust temperature, and cylinder imbalance—should be addressed through fuel pressure testing, return-flow testing, cylinder cut-out testing, injector balance checks, ECM code reading, visual inspection, and fuel quality inspection, with dirty fuel, water contamination, worn internal components, damaged seals, poor filtration, and incorrect installation treated as the most frequent root causes.