TUBE AS 9C7920 - Caterpillar

Illustration 1 g00629971
Engine Speed Dial SwitchThe engine speed dial switch is designed to inform the controller about the speed that is desired by the operator. The engine speed dial switch has ten positions: 1-10. Each position of the switch has a unique combination of connector contacts that close to contact 1. A combination of contact 2 through contact 5 will close to contact 1. This switch will ground a unique combination of inputs for the engine speed dial to the controller.
Illustration 2 g00663092
Travel Pressure Switch And Implement/Swing Pressure SwitchThe travel pressure switch and the implement/swing pressure switch will monitor the hydraulic system. These switches will inform the controller about the status of the hydraulic demands. When there is no hydraulic demand these switches are open. The function of the automatic engine speed control (AEC) of the controller will use these switches to determine operation. These switches are in the normally open position, when the switches are not installed on the machine.
Illustration 3 g00662530
Low Idle SwitchThe low idle switch is located on the top of the right control lever. During normal operation, the low idle switch is open. When the low idle switch is pressed, the switch will close. This action will ground the input to the controller. If the low idle switch is pressed one time and a hydraulic load is not present, the engine speed will be reduced. If the low idle switch is pressed again or the hydraulic system is being activated, the engine will return to the engine speed that was selected by the operator by using the engine speed dial switch.Note: If the low idle switch is pressed and a hydraulic load is present on the engine, the speed of the engine will not be affected.
Illustration 4 g00662559
Hydraulic