SHIM PACK 6G6535 - Caterpillar

Electronic Governors
The engine speed is detected by an engine speed sensor (magnetic pickup) that is installed in the flywheel housing. The sensor generates AC voltage that is sent to the governor. The governor sends DC voltage to an actuator. The actuator converts the electrical input into a mechanical output. The actuator moves the linkage that is connected to the throttle plate in order to adjust the engine speed.If the engine speed is greater than the speed setting, the governor reduces the output to the actuator. If the engine speed is less than the speed setting, the governor increases the output to the actuator.For detailed information on electronic governors, refer to the appropriate publication for your equipment.
Service Manual, RENR1356, "Flo-Tech Speed Control"
Systems Operation/Testing and Adjusting, RENR2471, "Generator Set Load Sharing Module"
Service Manual, SENR1196, "ProAct Digital Speed Control"
Service Manual, SENR3585, "2301A Electric Governors (Load Sharing) for Generator Set and Industrial Engines"
Service Manual, SENR4676, "2301A Speed Control"
Service Manual, SENR6430, "524/1724 Electric Governor System"Mechanical Governors
Pressure Compensated Simple Governor (PSG)
The basic PSG is a hydromechanical governor. The governor's hydraulic pressure is provided by engine oil. The operation is normally isochronous. Unless the load is changing, the engine speed is maintained regardless of the load.For detailed information on the governor, refer to Installation, Operation, and Maintenance, SENR6514, "PSG Governor with Cast Iron Case".