original 553-2592 Mechanical Fuel Injector 235-9649 387-9433 20R-9433 for C9 3126 Excavator new injector original new injector

Engineered as a direct-fit replacement for the C9 diesel platform, fuel injector 553-2592 5532592 is calibrated to the combustion requirements of the C9 engine fitted in 330D, 336D, 336D2, and 340DL excavators. The injector GP is matched to the engine's common rail injection parameters, supporting consistent fuel pressure delivery, precise atomization, and stable metering across the full operating range demanded by heavy-duty construction and earthmoving machinery.

The 553-2592 injector assembly is cross-referenced with 387-9433, 20R-1917, 572-0119, and 10R-7222, allowing distributors, fleet operators, and service workshops to source a single SKU for multiple OE references covering the C9 excavator family. This compatibility simplifies inventory management for rebuild operations and minimizes downtime when servicing 330D, 336D, 336D2, and 340DL units operating in mining, road construction, and general heavy equipment environments under sustained high load conditions.

For maintenance and diagnostic use, the injector is intended to be installed alongside clean diesel supply, scheduled fuel filter replacement, regular water separator draining, and routine inspection of injector sealing surfaces and fuel lines. Recommended pre-installation practices include bench testing, verification of return flow, and confirmation of rail pressure to detect hard starting, rough idle, black smoke, power loss, or excessive return fuel before returning the C9-powered excavator to service.