318-1181 Engine RPM Revolution Speed Sensor Replacement for Caterpillar CAT Excavator E320B E330B E330C E336D 3181181 189-5746

Product Overview The 318-1181 Engine RPM Revolution Speed Sensor is a critical diagnostic component designed for Caterpillar (CAT) Hydraulic Excavators and Heavy Equipment. Mounted on the engine flywheel housing or timing gear cover, this high-precision inductive pick-up sensor monitors real-time engine crankshaft speed, delivering accurate pulse signals to the vehicle’s Electronic Control Module (ECM). By maintaining flawless timing and synchronization data, it prevents engine bogging, erratic governor response, and hydraulic system power drops, making it an essential maintenance replacement part for high-hour earthmoving and construction fleets. Technical Specifications Main OE Number: 318-1181, 3181181 Interchangeable Numbers: 189-5746, 1895746, 4P-5820, 4P5820, T413742 Function: Engine Timing / Flywheel Crankshaft Rotational Speed Monitoring Connector Design: Heavy-Duty Waterproof Sealed Multi-Pin Plug Sensor Type: Magnetic Inductor Pickup Condition: 100% Brand New Premium Aftermarket Replacement Broad Vehicle Compatibility This heavy-duty speed revolution sensor features an extremely wide application footprint, crossing over a broad range of CAT heavy crawler equipment and engines (such as CAT C7, C9, C13, 3066, and 3126): Series Compatible Models & Applications CAT Heavy Duty Excavators E330B, E330B L, 330C, 330C L, 330D, 336D, 336D L, 345, 349, 365, 375, 385, 390 CAT Medium Duty Excavators CAT 320, 320B, 320C, 322C, 324, 325, 326, 313 Series Engine Platforms & Systems Compatible with Paccar/Caterpillar industrial drivetrains, material handlers, and marine gear systems requiring 318-1181 specifications Key Benefits Multi-Model Utility: Highly adaptable cross-compatibility replaces older legacy numbers like 189-5746 and 4P-5820 seamlessly, reducing stock complexity. High Thermal Stability: Engineered with a premium ruggedized housing to withstand prolonged exposure to intense engine block temperatures and severe job site vibrations. Precision Accuracy: Effectively eliminates common electronic errors like “RPM Needle Drops,” preventing the engine from triggering a forced automatic low-idle fail-safe mode. Easy Installation: Built to exact factory dimensional specifications for a tight, leak-proof, plug-and-play fit without cutting or splicing. Cross-Reference Guide This sensor interchanges with the following original and aftermarket part numbers: CATERPILLAR: 318-1181, 3181181, 189-5746, 1895746, 4P-5820, 4P5820 PERKINS / OTHERS: T413742, Premium heavy-duty electrical components calibrated to CAT diagnostic specs Maintenance Tip: If your CAT E330C or 336D Excavator experiences rough idling, sudden engine cutting out, or failure to communicate engine speed to the monitor, inspect the 318-1181 sensor. Because it operates on the flywheel housing, the magnetic pick-up head frequently collects fine metallic debris. We highly recommend pulling the sensor, wiping the face completely clean, and checking the connector pin weather-seals before completing installation.