Caterpillar original Fuel Injector Nozzle 0R-3536 Replacement for OEM, Cross Reference 4W-7019, 0R-1745, for Engine 3406 3408, 0R-3422 for Excavator original new injector

Built for demanding diesel operations, the CAT 0R-3536 fuel injector nozzle delivers precisely metered, finely atomized fuel to the combustion chamber. Its calibrated nozzle-needle operation and optimized spray geometry support efficient air-fuel mixing, helping maintain combustion efficiency, power output, fuel economy, cold starting, emissions control, and engine responsiveness. The nozzle is compatible with CAT C7, C9, 3126, 3126B, 3406E, C11, C13, and 3306 diesel engine platforms.

Manufactured from hardened alloy steel, the injector combines CNC grinding, advanced heat treatment, advanced surface treatment, and strict quality control to provide dimensional accuracy, wear resistance, corrosion protection, and high-pressure capability. These features support reliable service in high-temperature, heavy-load, and continuous-duty environments. Before shipment, every injector is tested for spray-pattern accuracy, leakage resistance, opening-pressure consistency, and fuel-flow performance, giving distributors, rebuilders, and maintenance teams a consistent OEM-standard replacement option.

For straightforward sourcing, 0R-3536 is referenced against 7N-8518, 325-9351, 213-0611, 236-9310, 326-9315, 212-8475, 204-5922, 249-0713, 293-4072, 328-2582, and 387-9433. Applications include CAT excavators, wheel loaders, bulldozers, motor graders, C7 and C9 generator sets, marine engines, industrial power units, and CAT-powered agricultural equipment. Supplied new in industrial export packaging, the nozzle is suited to construction, mining, power generation, industrial, marine, and heavy-transportation fuel-system requirements.