6684037 Engine Speed RPM Sensor Replacement for Bobcat Loader S130 S150 S160 S175 S185 753 763 773 Excavator 325 331 6679853

Product Overview The 6684037 Engine Speed RPM Sensor is a premium, high-sensitivity heavy-duty diagnostic component specifically engineered for Bobcat Skid Steer Loaders, Compact Track Loaders, and Mini Excavators. Mounted adjacent to the engine flywheel ring gear, this electromagnetic pick-up sensor detects real-time crankshaft rotational velocity and transmits instantaneous speed telemetry pulses directly to the machine’s Electronic Control Unit (ECU). By eliminating timing drift and sensor lag, it ensures perfect automated engine throttle response, steady hydraulic load synchronization, and accurate digital dashboard tachometer readings. It serves as an essential, direct aftermarket replacement part to restore fleet productivity and prevent electrical fault codes. Technical Specifications Primary Bobcat OE Number: 6684037 Interchangeable Part Numbers: 6679853, 6658260, 6651517 Sensor Type: Inductive Magnetic Flywheel Pickup (Speed / RPM / Revolution) Connector Profile: Heavy-Duty Waterproof Sealed Integrated Lead and Connector Plug Material: Premium Weatherproof Composite Chassis with High-Heat Magnetic Internal Coils Condition: 100% Brand New Premium Commercial Aftermarket Replacement Broad Equipment Compatibility This heavy-duty RPM sender possesses a widespread application footprint, crossing over between multiple generations of Kubota and Perkins diesel-powered Bobcat industrial construction equipment: Equipment Category Compatible Bobcat Models & Platform Fitments Skid Steer Loaders (S-Series) S100, S130, S150, S160, S175, S185, S205, S220, S250, S300, S330, A300 Commercial Loaders Skid Steer Loaders (Classic) 751, 753, 763, 773, 863, 873, 883, 963 Legacy Fleet Frames Compact Track Loaders (T-Series) T140, T180, T190, T200, T250, T300, 864 High-Traction Multi-Terrain Loaders Mini Compact Excavators 325, 328, 329, 331, 334, 341 Hydraulic Excavator Systems Modern M-Series Applications Select auxiliary engine timing adaptations for 750, 770 tier series power setups Key Benefits Flawless Cross-Reference Utility: 100% interchangeable with older or alternative factory codes 6679853, 6658260, and 6651517 without requiring wiring harness modifications. High Shock & Vibration Calibration: Encapsulated structural layout survives aggressive engine block heat cycles and severe chassis vibration common to skid steer attachments and breaking jobs. Precision Signal Timing: Effectively fixes active electronic problems such as erratic engine hunting, sudden engine stalling under hydraulic load, or false dashboard speed errors. Direct Plug-and-Play Installation: OAL wire lead and sealed plug design follow original parameters precisely, ensuring a clean, leak-free thread-in installation. Cross-Reference Guide This sensor interchanges with the following original manufacturer equipment catalog references: BOBCAT: 6684037, 6679853, 6658260, 6651517 INDUSTRIAL COMPACT SPARES: Premium high-durability electrical parts engineered to match original Bobcat instrumentation requirements Maintenance Tip: If your Bobcat S185 Skid Steer or 331 Mini Excavator undergoes sudden power loss, registers intermittent engine speed diagnostic drops, or fails to throttle up properly, evaluate the 6684037 sensor. Because it sits next to the heavy moving flywheel ring gear, its inductive tip acts as a magnet that regularly collects fine micro-metallic wear shavings and packed belt dust. We highly recommend unscrewing the sensor during routine servicing, wiping the pickup face perfectly clean, and testing the plug connection before completing installation of this new replacement unit.