Model Designation: PC55 PC55MR - 2
Purpose: The hydraulic main pump is a crucial component in the Komatsu machinery's hydraulic system. It is designed to supply high - pressure hydraulic fluid to various hydraulic actuators such as cylinders and motors to enable the proper operation of the equipment.
Compatibility: Specifically designed for use in Komatsu PC55 and PC55MR - 2 models.
2. Performance Specifications
2.1 Flow Rate
Maximum Flow Rate: [Specify the maximum flow rate value] L/min (liters per minute). This flow rate determines the speed at which the hydraulic fluid can be delivered to the actuators and affects the working speed of the equipment. For example, a higher flow rate generally enables faster movement of the excavator's arms and buckets.
Variable Flow Control: The pump is equipped with a variable flow control mechanism. This allows the operator to adjust the flow rate according to the specific requirements of the task. The flow rate can be adjusted within a certain range to optimize the performance of the hydraulic system for different working conditions such as light - duty or heavy - duty operations.
2.2 Pressure Ratings
Rated Pressure: [Value] MPa (megapascals). The rated pressure indicates the normal working pressure that the pump can continuously provide. It is designed to ensure that the hydraulic system operates within a safe and efficient pressure range.
Maximum Working Pressure: [Value] MPa. This is the maximum pressure that the pump can withstand for a short period during peak load conditions. Exceeding this pressure for an extended period may lead to damage to the pump and other components of the hydraulic system.
3. Construction and Design
3.1 Pump Type
Piston Pump: The 708 - 3S - 00872 hydraulic main pump is a piston - type pump. Piston pumps are known for their high efficiency and ability to generate high pressures. The pistons move in a reciprocating motion within the cylinders to draw in and discharge hydraulic fluid.
3.2 Materials
Casing: The pump casing is made of high - strength cast iron or a suitable alloy. This material provides excellent durability and resistance to the high pressures and mechanical stresses that the pump is subjected to during operation.
Internal Components: Pistons, valves, and other internal components are typically made of hardened steel or other wear - resistant materials to ensure a long service life. The precise machining and high - quality materials used in these components contribute to the pump's reliable performance.
3.3 Sealing System
The pump features a high - quality sealing system. Seals are made of special elastomeric materials that are resistant to hydraulic fluids and can withstand the high - pressure environment. The seals prevent hydraulic fluid leakage, ensuring the efficiency of the pump and protecting the surrounding components from contamination by the fluid.
