5I-7579 Engine Flywheel Revolution Speed Sensor Replacement for Caterpillar CAT Excavator E200B 312 320B 320C 5I7579

Product Overview The 5I-7579 Engine Revolution Speed Sensor is a critical diagnostic component designed for Caterpillar (CAT) Excavators and Heavy Machinery. Mounted directly on the engine rotational flywheel housing, this high-quality inductive sensor monitors real-time crankshaft RPM and engine speed, sending precise electrical pulses to the vehicle’s Electronic Control Module (ECM). By ensuring flawless timing and speed synchronization, it prevents engine stalling, hard starts, and hydraulic performance drops, making it an essential maintenance replacement part for high-hour construction fleets. Technical Specifications Main OE Number: 5I-7579, 5I7579 Interchangeable Numbers: 125-2966, 196-7973, 193-2550, 189-5746, 318-1181, 4P-5820 Plug Design: Round Waterproof Multi-Pin Connector Plug Function: Engine RPM / Flywheel Rotational Speed Monitoring Sensor Type: Magnetic Inductor Pick-Up Sensor Condition: 100% Brand New Premium Replacement Broad Vehicle Compatibility This sensor is highly versatile and specifically designed for Caterpillar heavy-duty diesel engines (such as CAT 3066, 3116, 3126, and 3306) across the following excavator series: Series Compatible Models & Applications CAT Classic & B-Series E120B, E200B, 320B, 320B L, 322B, 330B, 330B L CAT C-Series & Medium Duty 311, 312, 312B, 315, 315B, 320C, 320C L, 330C, 330C L Construction Machinery Various CAT heavy-duty industrial engines, crawler excavators, and forestry equipment requiring 3/4″ thread induction sensors Key Benefits Broad Cross-Compatibility: Engineered to interchange seamlessly with multiple CAT OE part numbers like 125-2966 and 196-7973 for easy stock management. Heavy-Duty Ruggedness: High-grade housing delivers superior thermal stability to withstand extreme engine temperatures and constant vibrations. Precision RPM Tracking: Prevents false “RPM Sensor Fault” dash codes, erratic throttle response, and black smoke caused by incorrect timing signals. Easy Installation: Factory-spec round plug design ensures a tight, anti-corrosion, plug-and-play fit without modification. Cross-Reference Guide This sensor interchanges with the following original and aftermarket part numbers: CATERPILLAR: 5I-7579, 5I7579, 125-2966, 1252966, 196-7973, 1967973 ADDITIONAL CAT CROSSES: 193-2550, 189-5746, 318-1181, 4P-5820 Maintenance Tip: If your CAT 320B or 320C Excavator suffers from sudden engine cutting out, rough idling, or a lag in hydraulic response, inspect the 5I-7579 sensor tip. Because it sits on the flywheel housing, it easily attracts magnetic metal dust. We highly recommend wiping the sensor tip completely clean and adjusting the clearance gap properly during installation to guarantee a clear inductive signal.