Repairing a critical friction pair in a Danfoss hydraulic pump usually involves repairing or replacing the components that make up the friction pair. The friction pair refers to two parts that contact each other and generate friction during the operation of the pump. To restore critical friction pairs of Danfoss hydraulic pumps, follow these general steps: 1. Identify the specific composition of the friction pair: determine which components of the hydraulic pump form the friction pair. It usually consists of a rotating element (such as a shaft or rotor) and a stationary element (such as a housing or stator). 2. Inspect Components: Inspect the condition of components to assess the extent of damage or wear. Look for signs of excessive friction, such as scratches, pitting, or unusual wear patterns. 3. Clean components: Before any repairs or replacements, thoroughly clean components to remove any dirt, debris or contamination that may affect friction pair performance. Use appropriate cleaning methods and solvents recommended by the manufacturer. 90-R-055-MA-2-NN-80-L-3-S1-D-03-GBA-32-32-20 90R055MA2NN80L3S1D03GBA323220 90-R-055-MA-2-NN-80-P-4-S1-C-03-GBA-20-20-24 90R055MA2NN80P4S1C03GBA202024 90-R-055-MA-2-NN-80-S-3-C6-C-03-GBA-35-35-24 90R055MA2NN80S3C6C03GBA353524 90-R-055-MA-2-NN-80-S-3-S1-C-03-GBA-42-42-24 90R055MA2NN80S3S1C03GBA424224 90-R-055-MA-2-NN-80-S-4-C6-C-03-GBA-42-42-24 90R055MA2NN80S4C6C03GBA424224 90-R-055-MA-5-AB-60-P-4-C6-D-C5-GBA-42-42-24 90R055MA5AB60P4C6DC5GBA424224 90R055-MA-5-AB-60-P-4-T1-C-C5-GBA-32-32-24 90R055MA5AB60P4T1CC5GBA323224 90-R-055-MA-5-AB-60-P-4-T1-C-C5-GBA-32-32-24 90R055MA5AB60P4T1CC5GBA323224 90-R-055-MA-5-AB-60-S-4-C6-C-C5-GBA-29-29-24 90R055MA5AB60S4C6CC5GBA292924 90-R-055-MA-5-AB-60-S-4-C6-D-C6-GBA-45-45-24 90R055MA5AB60S4C6DC6GBA454524 90-R-055-MA-5-AB-80-S-4-C6-D-C5-GBA-20-20-24 90R055MA5AB80S4C6DC5GBA202024 90-R-055-MA-5-BB-60-D-3-S1-L-C5-GBA-42-42-24 90R055MA5BB60D3S1LC5GBA424224 90-R-055-MA-5-BB-60-R-3-C6-D-C5-GBA-40-40-24 90R055MA5BB60R3C6DC5GBA404024 90-R-055-MA-5-BB-60-S-4-C6-D-C5-GBA-32-32-24 90R055MA5BB60S4C6DC5GBA323224 90R055-MA-5-BC-60-S-3-C6-C-C5-GBA-42-42-24 90R055MA5BC60S3C6CC5GBA424224 90-R-055-MA-5-BC-60-S-3-C6-C-C5-GBA-42-42-24 90R055MA5BC60S3C6CC5GBA424224 90R055-MA-5-BC-60-S-3-S1-C-C5-GBA-35-35-24 90R055MA5BC60S3S1CC5GBA353524 90-R-055-MA-5-BC-60-S-3-S1-C-C5-GBA-35-35-24 90R055MA5BC60S3S1CC5GBA353524 90-R-055-MA-5-BC-60-S-3-S1-D-C5-GBA-35-35-24 90R055MA5BC60S3S1DC5GBA353524 90-R-055-MA-5-BC-60-S-4-S1-C-C3-GBA-42-42-24 90R055MA5BC60S4S1CC3GBA424224 4. Repair or replace damaged parts: If the parts of the friction pair can be repaired, please follow the recommended repair procedures provided by Danfoss or consult a qualified technician familiar with the pump model. This may involve resurfacing or repairing components to restore them to their original specifications. 5. If the parts cannot be repaired or have reached the end of their service life, please use Danfoss original parts for replacement. Make sure the replacement part meets the specifications and requirements of your hydraulic pump model. 6. Lubrication and assembly: Apply appropriate lubricant recommended by Danfoss on the friction surface, and assemble the repaired or replaced parts back into the pump. Follow the manufacturer's guidelines for proper lubrication and assembly procedures. 7. Test and Verification: After reassembling the pump, perform a test and verification procedure to ensure that the restored friction pair is functioning properly. Check for any unusual noises, vibrations, or leaks that could indicate further problems. 8. Check Alignment: Proper alignment between rotating and stationary elements is critical for optimal performance and life of the friction pair. Make sure the components are properly aligned according to the manufacturer's specifications. If misalignment is detected, take necessary corrective action such as realigning components or using shims to achieve proper alignment. 9. Check the gap: check the gap between the rotating part and the stationary part of the friction pair. Too much or not enough clearance can result in inefficient operation or potential damage. Adjust the clearance using shims, shims, or other suitable means according to the manufacturer's recommendations. 90-R-055-MA-5-BC-80-R-4-S1-C-C3-GBA-23-23-20 90R055MA5BC80R4S1CC3GBA232320 90-R-055-MA-5-CD-60-P-3-C6-C-C5-GBA-26-26-24 90R055MA5CD60P3C6CC5GBA262624 90-R-055-MA-5-CD-60-P-3-C6-C-C5-GBA-42-42-24 90R055MA5CD60P3C6CC5GBA424224 90-R-055-MA-5-CD-60-R-3-C6-D-C5-GBA-35-35-24 90R055MA5CD60R3C6DC5GBA353524 90-R-055-MA-5-CD-60-R-3-C6-D-C5-GBA-40-40-24 90R055MA5CD60R3C6DC5GBA404024 90-R-055-MA-5-CD-60-R-3-S1-D-C5-GBA-35-35-24 90R055MA5CD60R3S1DC5GBA353524 90-R-055-MA-5-CD-80-S-3-C6-C-C5-GBA-45-45-24 90R055MA5CD80S3C6CC5GBA454524 90-R-055-MA-5-CD-80-S-4-C6-C-C5-GBA-42-42-24 90R055MA5CD80S4C6CC5GBA424224 90-R-055-MA-5-CD-80-S-4-S1-C-C5-GBA-26-26-20 90R055MA5CD80S4S1CC5GBA262620 90-R-055-MA-5-NN-60-S-3-S1-D-C5-GBA-42-42-24 90R055MA5NN60S3S1DC5GBA424224 90-R-055-MA-5-NN-80-R-4-S1-C-C3-GBA-23-23-20 90R055MA5NN80R4S1CC3GBA232320 90-R-055-MA-5-NN-80-S-3-S1-B-C5-GBA-42-42-24 90R055MA5NN80S3S1BC5GBA424224 90-R-055-MA-5-NN-80-S-3-S1-C-C5-GBA-42-42-24 90R055MA5NN80S3S1CC5GBA424224 90-R-055-MA-5-NN-80-S-4-S1-C-C5-GBA-26-26-20 90R055MA5NN80S4S1CC5GBA262620 90-R-075-DC-1-AB-60-S-3-C6-D-GF-GBA-23-23-20 90R075DC1AB60S3C6DGFGBA232320 90-R-075-DC-1-AB-60-S-4-C6-D-GB-GBA-23-23-20 90R075DC1AB60S4C6DGBGBA232320 90-R-075-DC-1-BC-60-R-4-T1-D-GB-GBA-32-32-24 90R075DC1BC60R4T1DGBGBA323224 90-R-075-DC-1-BC-60-S-3-S1-D-GB-GBA-35-35-20 90R075DC1BC60S3S1DGBGBA353520 90-R-075-DC-1-BC-60-S-3-S1-D-GB-GBA-42-42-24 90R075DC1BC60S3S1DGBGBA424224 90-R-075-DC-1-BC-80-L-4-S1-C-GB-GBA-29-29-24 90R075DC1BC80L4S1CGBGBA292924 10. Monitor the operating condition: Regularly monitor the operating condition of the hydraulic pump to ensure that the restored friction pair is in the best condition. Pay close attention to factors such as temperature, pressure and fluid quality to identify any signs of abnormal wear or deterioration. Address any issues promptly to prevent further damage to the friction pair. 11. Follow recommended maintenance practices: To maintain the performance and prolong the life of the restored friction pair, follow the recommended maintenance practices provided by Danfoss. This typically involves regular inspections, lubrication and scheduled maintenance tasks such as fluid changes, filter changes and preventive maintenance programs. 12. Seek professional help when necessary: If you encounter difficulties in the repair process or lack the necessary professional knowledge, it is recommended that you seek help from qualified technicians or contact Danfoss directly. They can provide expert guidance and support based on your specific pump model and situation. 13. Carry out the running-in procedure: After restoring the friction pair, it is recommended to carry out the running-in procedure. This involves running the hydraulic pump at a reduced load and speed for a specific duration as recommended by the manufacturer. The purpose of the break-in procedure is to allow the components to wear down and achieve proper seating and optimum performance. 14. Monitor performance and make adjustments: Once the pump is back in operation, closely monitor its performance. Note any unusual vibrations, noises, or changes in operating parameters. If any problems arise, investigate and make necessary adjustments to friction pairs or other related components. Address any anomalies promptly to prevent further damage. 90-R-075-DC-1-BC-80-P-3-C6-E-G8-GBA-35-35-24 90R075DC1BC80P3C6EG8GBA353524 90-R-075-DC-1-BC-80-P-4-C6-E-G8-GBA-35-35-24 90R075DC1BC80P4C6EG8GBA353524 90R075-DC-1-BC-80-P-4-S1-D-GB-GBA-42-42-24 90R075DC1BC80P4S1DGBGBA424224 90-R-075-DC-1-BC-80-P-4-S1-D-GB-GBA-42-42-24 90R075DC1BC80P4S1DGBGBA424224 90-R-075-DC-1-CD-60-L-4-S1-D-GB-GBA-20-20-24 90R075DC1CD60L4S1DGBGBA202024 90-R-075-DC-1-CD-60-P-3-S1-D-GB-GBA-42-42-24 90R075DC1CD60P3S1DGBGBA424224 90-R-075-DC-1-CD-60-S-3-S1-D-GB-GBA-42-42-24 90R075DC1CD60S3S1DGBGBA424224 90-R-075-DC-1-CD-80-L-4-S1-D-GB-GBA-20-20-24 90R075DC1CD80L4S1DGBGBA202024 90-R-075-DC-1-CD-80-P-3-C7-E-GB-GBA-38-38-24 90R075DC1CD80P3C7EGBGBA383824 90-R-075-DC-1-NN-60-P-4-S1-D-GB-GBA-23-23-24 90R075DC1NN60P4S1DGBGBA232324 90-R-075-DC-1-NN-60-P-4-S1-D-GB-GBA-42-42-24 90R075DC1NN60P4S1DGBGBA424224 90-R-075-DC-1-NN-80-P-3-S1-E-GB-GBA-38-38-24 90R075DC1NN80P3S1EGBGBA383824 90-R-075-DC-1-NN-80-P-4-C6-D-GB-GBA-42-42-24 90R075DC1NN80P4C6DGBGBA424224 90-R-075-DC-1-NN-80-P-7-S1-E-GF-GBA-38-38-24 90R075DC1NN80P7S1EGFGBA383824 90-R-075-DC-1-NN-80-R-4-S1-C-GB-GBA-29-29-24 90R075DC1NN80R4S1CGBGBA292924 90R075-DC-2-BC-80-S-4-C7-D-GB-GBA-26-26-24 90R075DC2BC80S4C7DGBGBA262624 90-R-075-DC-2-BC-80-S-4-C7-D-GB-GBA-26-26-24 90R075DC2BC80S4C7DGBGBA262624 90-R-075-DC-2-CD-80-P-4-C7-D-GB-GBA-32-32-24 90R075DC2CD80P4C7DGBGBA323224 90R075-DC-5-AB-60-S-4-C7-D-GB-GBA-38-38-24 90R075DC5AB60S4C7DGBGBA383824 90-R-075-DC-5-AB-60-S-4-C7-D-GB-GBA-38-38-24 90R075DC5AB60S4C7DGBGBA383824 15. Document the recovery process: Proper documentation of the recovery process is important. Document the steps taken, parts replaced or repaired, adjustments made, and any other relevant information. This documentation is valuable for future reference, maintenance, and troubleshooting. 16. Follow the maintenance cycle: After the key friction pair recovers, follow the maintenance cycle recommended by Danfoss. Inspect and maintain the pump regularly according to the manufacturer's guidelines. This will help ensure the continued performance and life of the friction pair. 17. Consider preventive measures: To prevent future friction pair damage or wear, consider implementing preventive measures. This may include installing additional filtration systems, using high-quality hydraulic fluid, and implementing condition monitoring techniques such as vibration analysis or fluid analysis. These measures help identify potential problems early and mitigate them before they cause significant damage. It is important to note that the steps above provide general guidelines for the recovery process. Always refer to Danfoss specific documentation and recommendations for your hydraulic pump model. If you are unsure or need additional assistance, it is recommended to consult a qualified technician or contact Danfoss directly for personalized guidance.