8-ton and 9-ton wheeled excavator main pump," specific details can be elaborated from the following aspects:
1. Definition and Purpose:
• The 8-ton and 9-ton wheeled excavator main pumps are the core hydraulic components of these two specifications of wheeled excavators.
• They are responsible for providing high-pressure hydraulic oil to drive various working devices of the excavators (such as booms, arms, buckets, etc.) for excavation, loading, and other operations.
2. Working Principle:
• The main pump is driven by the engine to convert mechanical energy into hydraulic energy.
• Hydraulic oil is pressurized by the main pump and delivered to various working devices through a series of pipes and control valves.
• The hydraulic cylinders or hydraulic motors in the working devices produce movement or rotation under the action of high-pressure hydraulic oil, thereby realizing various actions of the excavator.
3. Structure and Characteristics:
• The main pump usually consists of a pump body, plungers, a valve plate, and other components.
• The 8-ton and 9-ton wheeled excavator main pumps may adopt axial piston pumps or swashplate piston pumps, among other structural forms.
• These main pumps feature high pressure, large flow rate, and high efficiency, meeting the needs of excavators under various working conditions.
4. Maintenance and Servicing:
• Regularly check the quality and level of hydraulic oil in the main pump to ensure it is clean and free of impurities.
• Regularly replace the hydraulic oil filter and air filter to prevent impurities from entering the main pump.
• Pay attention to checking the seals and bearings of the main pump, which are prone to wear, and replace worn-out components in time.
• Avoid prolonged overload operation to prevent damage to the main pump.
5. Troubleshooting:
• If the main pump malfunctions (such as insufficient pressure, insufficient flow rate, excessive noise, etc.), first check the quality and quantity of the hydraulic oil.
• Check whether the inlet and outlet of the main pump are blocked and whether all control valves are working properly.
• If the fault cannot be resolved, professional maintenance personnel should be consulted for inspection and repair.