original 171-9710 Common Rail Fuel Injector for 3126 3126B Diesel Engine Excavator Parts Replacement for OEM 173-1012 222-5965 0R-9348 original new injector

Engineered for demanding diesel service, the 171-9710 HEUI fuel injector is a direct-fit replacement for 3126, 3126B, 3126E, and C7 platforms. Cross-referenced to 0R-9348, EX639348, 145-9360, 173-1012, 173-4566, 173-9267, 173-9268, 173-9379, 188-1320, and 222-5965, this injector supports both OEM-level rebuilds and global aftermarket distribution. Every unit is validated for flow balance, spray pattern, and leakage integrity, ensuring consistent cylinder performance across the six-injector set.

Built around a hydraulically actuated, electronically controlled architecture, the 171-9710 delivers precision fuel metering, multi-hole atomization, and rapid response to ECM commands. Its heavy-duty internal structure withstands high-pressure cyclic loading typical of 7.2L inline six-cylinder turbocharged diesel operation. Available as new aftermarket, remanufactured, rebuilt, or exchange units, the injector fits medium-duty trucks, buses, RVs, construction machinery, generator sets, marine support platforms, fire trucks, cranes, and pumping units. Suppliers recommend replacing all six injectors together to restore balanced combustion and eliminate cylinder-to-cylinder variation.

Installation requires verification of engine serial number, arrangement number, and cross reference (such as CA1719710, CA0R9348, or 09348). Clean the injector bore, replace all seals with fresh lubricated components, torque fasteners to service manual specification, prime the fuel system, and complete ECM diagnostic testing. Addressing symptoms such as hard starting, rough idle, black smoke, misfire codes, or engine derate, the 171-9710 restores reliable heavy-duty diesel performance.