Caterpillar original 4CR0197 Diesel Engine Fuel Injector Common Rail Nozzle for CAT 3126 3126B Perkins Replacement original new injector

The Caterpillar CAT 3126 3126B 3126E HEUI diesel fuel injector 4CR0197 is engineered as a direct replacement for the original Hydraulically Actuated Electronically Controlled Unit Injector fitted on the 7.2L 3126 series diesel engine. Designed to match OEM flow rate, spray pattern, and actuation pressure, this injector delivers precise fuel metering and high-pressure atomization, supporting stable idle quality, consistent acceleration response, and reduced exhaust smoke across medium-duty on-road and off-road operating conditions.

Built for global aftermarket distribution, the 4CR0197 unit is compatible with multiple Caterpillar cross references including 0R-9350, 10R-1267, 173-4059, 156-8895, 232-1183, 2C0273, 177-4754, 10R-0782, 128-6601, 222-5966, 180-7431, 171-9710, 171-9704, 10R-0197, 169-7410, 10R-1306, 174-7526, 198-4752, 188-1320, 10R-9237, 173-9379, and 10R-0781. Each injector is produced under strict quality control and can be supplied as new, original quality, remanufactured, rebuilt, or aftermarket stock, serving fleet operators, engine rebuilders, and diesel repair workshops in North America, Latin America, Europe, the Middle East, Africa, Southeast Asia, and Australia.

Before installation, technicians should verify the engine serial number, original injector part number, and engine arrangement, then clean the fuel system, replace seals and O-rings, lubricate O-rings with clean engine oil, and apply the official Caterpillar torque specification. After installation, bleed the fuel system, start the engine, inspect for leaks, scan ECM fault codes, and confirm smooth idle and acceleration performance.