The fan motor pump with the part number 179 - 9978 is designed specifically for the E325C excavator engine. It is an integral part of the engine's cooling and ventilation system, ensuring the proper operation of the fan to cool the engine and other components.
2. Pump Type and Function
Type: It is a hydraulic - driven or mechanically - driven fan motor pump, depending on the design of the excavator's system. If it's hydraulic - driven, it operates using the hydraulic pressure from the excavator's main hydraulic system. If it's mechanically - driven, it is connected to the engine's crankshaft through a belt or a gear mechanism.
Function: The primary function of this pump is to provide the necessary power to rotate the fan at a speed that is sufficient to move a certain volume of air across the engine radiator and other heat - exchanging components. This helps in dissipating the heat generated during the engine's operation and maintaining the engine's temperature within an optimal range.
3. Pressure and Flow Specifications (if hydraulic - driven)
Pressure: If it's a hydraulic - driven fan motor pump, it typically operates within a specific pressure range. The rated pressure can vary, but it's usually in the range of 10 - 20 bar (1 - 2 MPa). This pressure is provided by the excavator's hydraulic system and is used to drive the pump's internal mechanism to rotate the fan.
Flow Rate: The flow rate of the hydraulic fluid through the pump is also an important specification. It can range from 10 - 30 liters per minute (L/min), depending on the pump's design and the requirements of the fan's rotation speed. The flow rate determines how quickly the hydraulic energy is transferred to the pump to drive the fan.
4. Rotational Speed and Torque
Rotational Speed: The fan motor pump is designed to rotate the fan at a specific speed. The normal operating rotational speed of the fan can range from 800 - 2500 revolutions per minute (rpm). This speed is adjusted according to the engine's temperature and the cooling requirements. For example, when the engine is running at high load and generating more heat, the fan speed may increase to enhance cooling.
Torque: The pump must provide sufficient torque to overcome the inertia and resistance of the fan blades and any associated mechanical components. The torque output of the pump can range from 10 - 50 N·m (Newton - meters), depending on the fan's size, blade design, and the overall system requirements.
