Cummins original Fuel Injector 4088723 for X15 QSX15 ISX15 Diesel Engines Compatible with Excavator Parts Cross Reference PN 4903455 4088725 4088665 4010346 original new injector

Engineered for the demanding conditions of 15-liter heavy-duty platforms, the Cummins 4088723 diesel fuel injector delivers precision fuel metering and fine atomization across QSK15, QSKX15, QSX15, ISX15 and X15 engines. Public listings place 4088723 in the same product group as 1481827, 1846351, 4954646, 4954648, 570016, 1499714 and 1521977 for ISX15, QSX15 and X15 applications, providing strong cross-reference value for repair channels seeking reliable coverage.

This injector supports stable idle, power recovery and reduced smoke potential, making it well suited for truck repair, excavator maintenance, generator set service, mining equipment, oilfield machinery and construction applications. The QSX15 is documented by Cummins as a 15-liter engine rated at 450–675 hp and 1650–2050 lb-ft of torque, with generator prime ratings of 291–455 kW and standby ratings of 320–500 kW. Optional full-set supply, testing support and global aftermarket availability serve distributors, fleet operators and industrial engine rebuilders.

Before installation, confirm the original injector number, engine serial number, CPL, fuel-system type and machine model. Use clean diesel fuel, replace fuel filters on time and drain the water separator to protect injector life. Installation must be clean, with all required seals replaced, correct torque values applied, the fuel system bled, leakage checked, fault codes scanned and engine performance verified under load.