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

The Perkins C7 Series Fuel Injector 235-5261 is engineered for precision fuel metering and consistent combustion in Perkins C7 and C9 diesel engines. Built with a durable metal body, engineered nozzle geometry, and a high-pressure sealing structure, this injector delivers fine atomization and flow-balanced performance across demanding operating cycles. It supports stable power output, reduced smoke, and improved combustion stability, helping heavy equipment maintain productivity in construction, industrial, generator, mining, and quarry applications.

Designed as a direct OE-style replacement, the 235-5261 injector assembly fits Perkins 324D, 325D, 329D, 330D, and 336D excavators, as well as other Perkins-powered machinery using C7 or C9 engines. It is also referenced under cross numbers 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, providing broad aftermarket availability. Final fitment should always be confirmed using the engine serial number, arrangement number, machine model, and the original injector part number.

For reliable service life, operators should use clean diesel fuel that meets engine requirements, replace the fuel filter on schedule, drain the water separator regularly, and keep the fuel tank free of water, rust, sludge, and microbial contamination. Clean air filters, correct engine oil, and timely oil changes further protect the injection system. When rough idle, misfire, black or white smoke, high fuel consumption, power loss, or excessive return flow occurs, injector balance should be tested and fault codes read with a Perkins-compatible diagnostic tool. Replace the full injector set when multiple units show wear or uneven flow, and store spare injectors in sealed, dust-free, anti-corrosion packaging.