It is perfectly compatible with the E307C excavator, solving problems such as lack of maneuverability.
Quality: High quality, stable power, reliable performance, and made of highly wear-resistant materials, making it less prone to damage.
Last time we talked about troubleshooting yourself; this time we'll explain how to identify a high-quality hydraulic pump:
1. First, check the static appearance and workmanship:
- Casting process: Observe whether the pump casing surface is smooth. High-quality hydraulic pumps (such as Kawasaki or Rexroth original) have a fine casting surface without obvious sand holes, cracks, or rough burrs.
- Sealing: Check the pump shaft end, regulating valve connection, and housing seams. A good pump should not have any oil leaks.
- Fasteners: Observe whether the bolts show signs of disassembly (this is crucial for determining whether it is a refurbished pump). The bolt strength grade should meet the standard (usually grade 12.9).
2. Dynamic operation performance (most intuitive):
- Noise and vibration: A good pump runs smoothly with a stable sound frequency. A sharp whistling sound (potentially indicating cavitation) or a dull knocking sound (potentially indicating internal component damage) indicates poor quality.
- Heat generation: After running for a period of time, touch the pump casing. If the local temperature rises too quickly, it indicates severe internal leakage and low mechanical efficiency.
- Response speed: When adjusting the swashplate angle (for variable displacement pumps), observe the flow response. A good pump should switch pressure smoothly without lag when the load changes.
3. Key Performance Indicators
- Volume Efficiency: This is the core indicator of pump quality. It is the ratio of actual output flow to theoretical flow at rated pressure. A value above 90%-95% is generally considered a high-quality pump.
- Rated Pressure and Peak Pressure: A good pump can operate stably for extended periods under high pressure without severe internal leakage or component deformation.
- Self-priming performance: Especially for closed systems, the strength of the pump's self-priming capability directly affects its service life.
4. Industry Experience Tips
- Check Brand and Origin: Industry-recognized brands do have barriers to entry in materials science and processing precision.
- Check the "ID Card": Observe whether the nameplate information is clear and standardized, and whether the production batch can be traced through the serial number.
- Oil Sample Analysis: After running for a period of time, take a sample of the hydraulic oil for testing. If metal powder is found in the oil, it indicates abnormal wear of the internal friction pairs of the pump.
Shipping: Factory stock, global express delivery, multiple shipping methods for you to choose from, and will be packed and shipped within the specified time. Before shipping, we will carefully verify the product part number and pictures with you.
Service: We provide OEM service, with long-term warranty and professional after-sales service. If you need other models, you can also contact us and provide the correct model and part number.
