HOSE 9X2378 - Caterpillar

The E30 Electric Governor Control System consists of the following components:* KG30 Governor Control Unit* Actuator* Magnetic Pickup
KG30 Governor Control UnitThe E30 Electric Governor Control System allows precision engine speed control. The KG30 Governor Control Unit measures engine speed constantly and makes necessary corrections to the engine fuel setting through the actuator which is connected to the fuel system.The engine speed is sensed by a magnetic pickup. The magnetic pickup generates an AC voltage that is sent to the KG30 Governor Control Unit. The KG30 Governor Control Unit sends a DC voltage signal to the actuator.
Actuator (with base)
(1) Position indicator plate. (2) Connector (from the KG30 Governor Control Unit). (3) Actuator output shaft. (4) Position indicator.
Actuator (without base)
(1) Position indicator plate. (2) Connector (from the KG30 Governor Control Unit). (3) Actuator output shaft. (4) Position indicator.The actuator changes the electrical input from the KG30 Governor Control Unit to a mechanical output that is connected to the fuel system by a linkage. For example, if the engine speed is greater than the speed setting, the KG30 Governor Control Unit will decrease its output and the actuator will move the linkage to decrease fuel to the engine.The speed of the engine is adjusted between IDLE, and RATED, with the Remote Speed Setpoint potentiometer.
Basic System Schematic
(5) Actuator. (6) Engine. (7) Feedback line. (8) Magnetic pickup. (9) KG30 Governor Control Unit. (10) Remote Speed Setpoint potentiometer (11) Fuse.KG30 Governor Control Unit
KG30 Governor Control Unit
(1) Diode. (2) Maximum Fuel 5V potentiometer. (3) Stop 1.5V potentiometer. (4) Minimum Speed potentiometer. (5) Maximum Speed potentiometer. (6) Gain potentiometer. (7) Stability potentiometer. (8) Derivative potentiometer. (9) Gas Gain potentiometer. (10) Gas Diesel switch. (11) Start Fuel Limit potentiometer. (12) Start Fuel Limit slide switch. (13) Green, Light Emitting Diode (LED). (14) OV (-). (15) TP6 (+). (16) Droop potentiometer. (17) Droop Isochronous switch. (18) Speed Variance potentiometer. (19) Fast Response potentiometer. (20) Damping potentiometer.
KG30 Governor Control Unit Earlier, (green control board)
KG30 Governor Control Unit Later, (white control board)The KG30 Governor Control Unit provides precision engine speed control. The KG30 Governor Control Unit measures engine speed constantly, and makes necessary corrections to the engine fuel setting through the actuator connected to the fuel system.The engine speed is sensed by a magnetic pickup. As the teeth of the flywheel ring gear cut through the magnetic lines of force around the magnetic pickup, an AC voltage is generated. The frequency of the voltage is directly proportional to the engine speed. An electric circuit inside the KG30 Governor Control Unit processes the AC voltage. In response, the electric circuit sends a signal from the KG30 Governor Control Unit to the actuator, maintaining the set speed.The actuator is connected to the fuel system by linkage. The actuator changes the electrical input from the KG30 Governor Control Unit to mechanical output, changing the engine fuel setting. For example, if the engine speed is greater than the speed setting, the KG30 Governor Control Unit decreases fuel to the engine.The RATED, and LOW IDLE