471788 Volvo.Penta Sealing ring

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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. The combination of ground inputs will be sent to the controller.Travel Pressure Switch and Implement/Swing Pressure Switch
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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. Low Idle Switch
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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. 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. Hydraulic Oil Level Switch
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Hydraulic Oil Level SwitchThe hydraulic oil level switch monitors the hydraulic oil level after the starter key switch is kept in the ON position for 2 seconds or more. The controller checks hydraulic oil level with the switch. The switch opens when the hydraulic oil level is below the normal operating level. This switch is in the normally open position, when the switch is not installed on the machine. Boom Raise Pressure Switch
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Boom Raise Pressure SwitchIf the control lever for the boom is moved to the full boom raise position, the boom raise pressure switch will close. If "boom priority" is selected in the power mode, the controller will activate the fine control solenoid. This solenoid valve then causes front pump oil to go to the boom circuit only. The boom is capable of faster movements even if the operation is a combination of boom and stick. Engine Oil Level Switch
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Engine Oil Level SwitchThe engine oil level switch monitors the engine oil level after the starter key switch is kept in the ON position for 2 seconds or more. The controller checks oil level with the switch. The switch opens when the engine oil level is below the normal operating level. This switch is in the normally open position when the switch is not installed on the machine.Fine Swing Control Switch
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Fine Swing Control SwitchThe operation of fine swing will perform smooth start operations and stop operations of swing by controlling the ON/OFF solenoid valve that is connecting the "A" port and "B" port of the swing motor. When the fine swing control switch is turned to the ON position, the fine swing solenoid valve is activated. The controller will release the swing parking brake after the controller detects the switch in the ON position.Attachment Pedal Pressure Switch
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Attachment Pedal Pressure SwitchThe attachment pedal pressure switch will close when the attachment pedal is operated. The hammer mode is activated if the hammer mode is selected among the user modes. Even if the hammer mode is selected, the mode shall not be activated while the attachment pedal is not operated. The boom priority mode is activated rather than the hammer mode, if the attachment pedal pressure switch is open.