Cummins 3917132 Engine Speed Sensor

Technical Specifications and Application Data The Cummins 3917132 is an engine speed sensor designed to monitor crankshaft rotational speed and position for the engine control module (ECM). It generates a digital frequency signal proportional to engine RPM. This sensor is a critical input for fuel injection timing, governor control, and engine protection strategies. Application Coverage This sensor fits a wide range of Cummins diesel engine platforms including the B Series (4BT, 6BT), C Series (6CT), L Series, ISB, ISC, ISL, ISDe, ISLe, QSB, QSL, QSK, ISF, ISG, N, K, and M series. It is also referenced for Weichai WP2 series engines. Common equipment applications include excavators, wheel loaders, motor graders, and heavy-duty trucks from manufacturers such as XCMG, Sany, Liugong, Volvo, Caterpillar, and Sinotruk where these engines are installed. Construction and Durability The sensor features a robust stainless steel threaded body with an integrated connector sealed to IP67 standards for resistance against vibration, thermal shock, and contamination from oil, coolant, and debris typical in off-highway environments. The sensing element utilizes Hall-effect or magnetic inductive technology to ensure accurate signal generation across the operating temperature range of -40°C to +130°C. Installation Notes Direct replacement for OEM part number 3917132. Verify thread pitch and connector pinout match the original sensor before installation. Apply specified torque during installation to prevent housing damage or signal air gap errors.