PUMP, HYDRAULI 0982266 - Caterpillar

Power Mode Switch
Push this switch to change the power mode of the machine. When the engine start switch is turned on, the power mode is in the position as it was just before the engine start switch was turned off. Select a suitable power mode position from the three positions, depending on type of working conditions or purposes. The digging force does not vary in any mode. (Mode III) This mode is suitable for heavy duty work which needs high operating speed. Changing the switch to this position provides maximum machine power. (Mode II) This mode is suitable for ordinary work. Changing the switch to this position slightly reduces the operating speed and provides medium machine power. This will reduce the noise and fuel consumption, compared with Mode III. With the engine speed dial at maximum speed position "10" during equipment and/or swing operation, this mode position provides a maximum of engine speed equivalent to dial position "9". Travel operation is not affected. (Mode I) This mode is suitable for light duty work such as leveling work which does not need high speed. Changing the switch to this position provides the minimum machine power to minimize the fuel consumption and noise. With the speed dial at position "8" or higher, this mode position provides a maximum of engine speed equivalent to dial position "7".Work Mode Switch
Push this switch to select a work mode. When the engine start switch is turned on, the work mode is in the position as it was just before the engine start switch was turned off. Select a suitable work mode position, depending on the type of work to be done. Boom Priority Mode (1) - This position gives priority for the "BOOM RAISE" circuit. This will assure fast cycle time by increasing the boom up speed. Swing Priority Mode (2) - This position gives priority for swing circuit to assure independent swing pressure. This is suitable for ditch work which needs accurate and neat finished side wall surfaces. Fine Control Mode (3) - This position allows both boom and stick to operate independently. This assures fine and smooth movements of the boom and stick and is suitable for leveling work which needs a high precision finished level surface.Automatic Engine Speed Control (AEC)
The automatic engine speed control functions to automatically reduce engine speed when there is no hydraulic demand or when the hydraulic demand is very small. The purpose of the AEC system is to reduce fuel consumption and noise.The system will be inoperable while the governor system backup switch is in the MAN position. (If the hydraulic oil is not at normal operating temperature, the AEC may respond slowly.)The AEC system operates in the following three levels, depending on the position of the AEC switch and the operation of the manual Low Idle switch. In any condition, the engine rpm will recover automatically to the engine speed dial setting upon the activation of any hydraulic function. LEVEL ONE:* AEC switch OFF* Manual Low