Caterpillar 191-6840 Throttle Motor Governor Assembly

The 191-6840 throttle motor governor assembly functions as a stepper motor actuator controlling the fuel injection pump rack position on Mitsubishi 4M40 engines. It receives PWM signals from the engine ECM to maintain precise engine speed governance under varying load conditions. The unit features a sealed housing with a round electrical connector and mounting flange designed for direct installation on the injection pump governor housing. This component replaces Caterpillar OEM part numbers 191-6840 and 102-8007. It is engineered for compatibility with Caterpillar 308C CR, 308C, E308C, 307B, E307B, 307, 308B, and E308B mini hydraulic excavators. The actuator provides 12V DC operation with a rotational output shaft coupling to the governor lever. Construction includes corrosion-resistant materials suitable for under-hood operating environments.