The following steps and recommendations can be followed when maintaining Danfoss hydraulic pumps:
- Clean the pump body and surrounding area: Before performing any maintenance work, remove all dirt and grease from the outside and surrounding area of the pump to prevent contamination of internal components.
- Check the hydraulic lines: If the pump needs to be removed, mark each hydraulic line. If you disconnect the hydraulic lines, make sure that each open port is plugged to prevent dirt and contaminants from entering the pump.
- Check the hydraulic oil: Check the hydraulic oil for signs of system contamination, such as oil color change, foam in the oil, sludge, or small metal particles. If signs of contamination are found, replace all filters and drain, clean the hydraulic system, and refill with the correct hydraulic oil.
- Flush the lines: Flush the lines before changing the hydraulic oil.
- Test for leaks: Before reinstalling the pump, perform a leak test.
- Follow the manufacturer’s maintenance schedule: Danfoss provides specific maintenance recommendations for its hydraulic pumps, including oil change frequency, filter changes, and inspections. Following these recommendations is essential to keep the pump in good working condition.
- Use the right oil: Make sure you are using oil recommended by Danfoss and that it meets the required specifications.
- Keep the oil clean: Keep the oil clean by changing filters regularly and monitoring the oil level.
- Avoid pump overload: Running a hydraulic pump beyond its maximum capacity can cause excessive wear, which can lead to premature failure. Always follow the manufacturer’s recommendations for maximum pressure and flow rate.
- Monitor leaks: Regularly check the hydraulic system for leaks and address any issues promptly.
- Regular inspections: Schedule routine inspections to check for leaks, unusual noises or vibrations. Check hoses, fittings and connections for signs of wear or damage.
- Fluid checks: Regularly monitor the hydraulic fluid level and top up as needed. Use the recommended hydraulic fluid specified by Danfoss. Check fluid quality and cleanliness.
- Fluid filtration: Maintain an appropriate filtration system to ensure that the hydraulic fluid is clean and free of contaminants. Follow the recommended filter change intervals.
- Temperature control: Monitor the operating temperature of the hydraulic system. High temperatures can cause accelerated wear and reduced efficiency. Make sure the cooling system is functioning properly.
- Seal Check: Check and replace seals as needed to prevent leaks. Pay attention to plunger and rod seals.
- Alignment: Make sure the pump is properly aligned with the driven equipment to prevent excessive wear and misalignment issues.
- Lubrication: Follow the manufacturer’s guidelines for lubricating any moving parts. This includes bearings and other parts that may require lubrication.
- Pressure Settings: Regularly check and adjust pressure settings to ensure they are within the specified range. This helps prevent overloads and excessive wear.
- Training and Documentation: Make sure maintenance personnel receive proper training on the specific maintenance requirements of Danfoss piston pumps. Keep and follow the maintenance manuals provided by Danfoss.
- Special Tools: Use recommended tools for maintenance and repairs to avoid component damage.
- Keep Records: Maintain a log of maintenance activities, including inspections, repairs, and parts replacements. This can help identify trends and potential problems.
Following these steps and recommendations can help you maintain your Danfoss hydraulic pumps to ensure optimal performance and life.