If the Danfoss hydraulic pump is not pumping oil, there may be several potential causes of the problem: 1. Insufficient liquid level: Check the hydraulic oil tank and make sure it has enough oil. If the fluid level is low, the pump may not be able to draw oil effectively. Refill the reservoir to the recommended level. 2. Air in the system: Air trapped in the hydraulic system will prevent the pump from starting and pumping oil. Vent the system to remove any air pockets following the manufacturer's instructions or recommended procedures. 3. Blockage or restriction in the inlet line: Check the inlet line or suction strainer for any blockage or restriction that could prevent oil from flowing into the pump. Clean or replace the filter if necessary and make sure the inlet line is clear of any obstructions. 4. Worn or damaged pump components: Over time, the internal components of the pump can wear or become damaged, resulting in reduced pumping efficiency. Check the pump for any signs of wear, such as worn seals, scratches on the pistons or cylinder block, or damaged valves. If significant wear or damage is found, the pump may need repair or replacement. 5. Incorrect pump rotation or direction: Verify that the hydraulic pump is rotating in the correct direction according to the manufacturer's specifications. If the pump is rotating in the wrong direction, it will not be able to pump oil effectively. Check the hydraulic motor or any directional control valves for proper rotation. 90R130-KA-5-AB-80-S-3-C8-H-03-GBA-35-35-24 90R130KA5AB80S3C8H03GBA353524 90-R-130-KA-5-AB-80-R-4-F1-H-03-GBA-42-42-24 90R130KA5AB80R4F1H03GBA424224 90R130-KA-5-AB-80-R-4-F1-H-03-GBA-42-42-24 90R130KA5AB80R4F1H03GBA424224 90-R-130-KA-5-AB-80-R-4-F1-H-03-GBA-14-14-24 90R130KA5AB80R4F1H03GBA141424 90-R-130-KA-5-AB-80-R-4-C8-H-05-GBA-35-35-24 90R130KA5AB80R4C8H05GBA353524 90R130-KA-5-AB-80-R-4-C8-H-05-GBA-35-35-24 90R130KA5AB80R4C8H05GBA353524 90-R-130-KA-5-AB-80-R-4-C8-H-03-GBA-35-35-24 90R130KA5AB80R4C8H03GBA353524 90R130-KA-5-AB-80-R-4-C8-H-03-GBA-35-35-24 90R130KA5AB80R4C8H03GBA353524 90-R-130-KA-5-AB-80-R-3-F1-H-03-GBA-35-35-24 90R130KA5AB80R3F1H03GBA353524 90R130-KA-5-AB-80-R-3-F1-H-03-GBA-35-35-24 90R130KA5AB80R3F1H03GBA353524 6. Pump seal failure: Damaged or worn pump seals can cause internal leakage, resulting in pressure loss and ineffective pumping. Check the pump seals for signs of damage or wear. If necessary, replace the seals to restore proper function of the pump. 7. System pressure problem: If the hydraulic system pressure is too low or too high, it will affect the effective pumping capacity of the pump. Check the system pressure gauge or relief valve to make sure the pressure is within the recommended range. Make any necessary adjustments to regulate system pressure. 8. Mechanical failure: In some cases, hydraulic pumps will experience mechanical failure due to severe damage or excessive wear. If you've ruled out all other potential causes and the pump still doesn't pump oil, professional inspection and repair may be necessary. 9. Contaminated fluid: Contaminants such as dirt, debris or moisture in the hydraulic fluid can cause clogs and hinder the pump's ability to pump oil. Check hydraulic fluid for contamination and ensure it meets recommended cleanliness standards. If the fluid becomes contaminated, replace it and clean the system before operating the pump. 10. System leaks: Hydraulic leaks can cause a loss of fluid pressure and prevent the pump from pumping oil effectively. Check the hydraulic system for any visible leaks, including connections, hoses, fittings and seals. Repair any leaks found and make sure all connections are properly tightened. 11. Faulty or malfunctioning control valve: If the pump is not receiving the proper signal or command from the control valve, it may not be able to pump oil as expected. Check the control valve for any malfunction or incorrect setting. Make sure the valve is working properly and adjusted correctly. 12. Incorrect pump size or type: Verify that the Danfoss hydraulic pump is properly sized and meets hydraulic system requirements. Using an undersized pump or a pump not designed for the specific application will result in insufficient oil flow. Review the pump specification and make sure it meets the system requirements. 13. Electrical or Electronic Problems: If the hydraulic pump is operated by an electric motor or controlled electronically, electrical or electronic problems can prevent the pump from working properly. Check the electrical connections, wiring and control circuits for any faults or malfunctions. Make sure the power supply is stable and within the required voltage range. 90-R-130-KA-5-AB-80-R-3-F1-H-03-GBA-32-32-24 90R130KA5AB80R3F1H03GBA323224 90R130-KA-5-AB-80-R-3-F1-H-03-GBA-32-32-24 90R130KA5AB80R3F1H03GBA323224 90-R-130-KA-5-AB-80-R-3-F1-H-00-GBA-35-35-24 90R130KA5AB80R3F1H00GBA353524 90R130-KA-5-AB-80-R-3-F1-H-00-GBA-35-35-24 90R130KA5AB80R3F1H00GBA353524 90-R-130-KA-5-AB-80-R-3-F1-F-00-GBA-35-35-20 90R130KA5AB80R3F1F00GBA353520 90R130-KA-5-AB-80-R-3-F1-F-00-GBA-35-35-20 90R130KA5AB80R3F1F00GBA353520 90-R-130-KA-5-AB-80-R-3-F1-F-00-GBA-26-26-20 90R130KA5AB80R3F1F00GBA262620 90R130-KA-5-AB-80-R-3-F1-F-00-GBA-26-26-20 90R130KA5AB80R3F1F00GBA262620 90-R-130-KA-5-AB-80-R-3-C8-H-03-GBA-42-42-20 90R130KA5AB80R3C8H03GBA424220 90R130-KA-5-AB-80-R-3-C8-H-03-GBA-42-42-20 90R130KA5AB80R3C8H03GBA424220 14. Improper installation: An improperly installed hydraulic pump can cause operational problems. Check that the pump is installed correctly, aligned correctly, and that all mounting bolts are tightened to the manufacturer's specifications. Improper installation can cause misalignment and prevent the pump from pumping oil effectively. 15. System cavitation: Cavitation occurs when hydraulic fluid forms vapor bubbles due to low pressure areas, usually caused by restriction or excessive fluid viscosity. Cavitation can cause poor pump performance and insufficient oil flow. Check for any restrictions in the system, ensure proper fluid viscosity, and tune the system to minimize cavitation. It is important to address the specific cause of the problem in order to effectively resolve it. If the troubleshooting steps do not resolve the issue, it is recommended to seek the assistance of a qualified technician or contact Danfoss Support for further guidance and troubleshooting.