Perkins original Perkins 235-5261 Engine Common Rail Fuel Injector for Caterpillar Excavator C7 C9 Diesel Replacement Part new injector original new injector

The Perkins 235-5261 fuel injector is an OE-style replacement injector assembly designed for Perkins C7 Series and Perkins C9 Series diesel engines, serving the authorized OE number 235-5261 with a broad range of cross references including 2355261, 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. These cross numbers support sourcing flexibility for distributors, fleet operators, and service workshops handling Perkins C7 and C9 injector replacements, as well as related 3126 injector family references. The injector integrates into the HEUI / Common Diesel Injection System and is commonly listed for Perkins 324D, 325D, 329D, 330D, and 336D excavator applications, plus Perkins construction machinery, industrial engines, generator power units, mining machinery, and quarry machinery using Perkins C7 or C9 engines. Direct interchange must always be confirmed by the original injector part number and the engine serial number before installation.

Engineered with precision fuel metering, fine atomization, engineered nozzle geometry, and a high-pressure sealing structure, the 235-5261 injector delivers flow-balanced performance and replacement-ready installation. The durable metal body supports heavy-duty application suitability while helping maintain engine power, reduce smoke, improve combustion stability, and minimize installation risk. Each unit is supplied in sealed, dust-free, anti-corrosion packaging to preserve component integrity during storage and transit, supporting reliable equipment uptime across demanding work cycles.

Routine maintenance recommendations include using clean diesel fuel that meets engine requirements, replacing the fuel filter on schedule, draining the water separator regularly, and keeping the fuel tank free of water, rust, sludge, and microbial contamination. Clean air filters, correct engine oil, and oil change intervals should be maintained, and injector balance should be tested when rough idle or misfire occurs. Engine fault codes should be read with a Perkins-compatible diagnostic tool, and the full injector set should be replaced when multiple injectors show wear or uneven flow.