original 235-5261 Rail Fuel Injector Mechanical Pump Diesel for C7 C9 Excavator Engine Spare Part new injector original new injector

The C7 Series fuel injector 235-5261 is engineered as a direct OE replacement for C7 and C9 diesel engines used in excavators, construction machinery, generator power units, mining equipment, and industrial diesel power applications. The injector assembly supports HEUI and common diesel injection systems, delivering precision fuel metering, fine atomization, and flow-balanced performance to maintain engine power output, reduce smoke, and improve overall combustion stability across demanding heavy-duty operating cycles.

This injector 2355261 is commonly fitted to 324D, 325D, 329D, 330D, and 336D excavators, and is also referenced for broader C7 and C9 industrial engine platforms. The durable metal body, engineered nozzle geometry, and high-pressure sealing structure are designed to withstand continuous high-load operation, helping reduce installation risk, limit unplanned downtime, and support long-term equipment uptime in field and fleet environments. Cross references include 10R4761, 222-5961, 233-3536, 236-0973, 241-3238, 243-4502, 293-1408, 328-2583, 387-9430, 222-5959, 20R8057, 265-8106, 266-4446, and 387-9426.

For correct application, fitment must always be confirmed by the original injector part number, engine serial number, arrangement number, and machine model prior to installation. Use clean diesel fuel, replace fuel filters on schedule, drain the water separator regularly, and keep the fuel tank free of water, rust, sludge, and microbial contamination. When rough idle, misfire, excessive return flow, or unbalanced cylinder temperature is observed, test injector balance and read engine fault codes with a -compatible diagnostic tool, and replace the full injector set when multiple units show wear or uneven flow.