Insufficient oil discharge in axial piston pumps can be caused by a number of factors. Here are some possible causes and solutions: Insufficient oil supply: Check oil level and add more oil if necessary. Also, make sure the oil filter is clean and not clogged. Suction line blocked: Check the suction line for any blockage or restriction. Remove any dirt, debris or air bubbles that may be clogging. Air Leaks: Check for air leaks in the suction line, pump casing, or any other connection. Tighten or replace any loose or damaged parts. Worn or damaged piston seals: Check the piston seals for worn or damaged piston seals. Replace any worn or damaged seals. Damaged pump: If none of the above solutions work, the pump may be damaged and need to be repaired or replaced. In general, it is important to perform regular maintenance and inspections to prevent and identify any potential problems with axial piston pumps. 90-L-055-MA-2-AB-60-P-3-S1-C-03-GBA-45-45-20 90L055MA2AB60P3S1C03GBA454520 90-L-055-MA-2-BC-60-P-3-C6-C-03-GBA-42-42-24 90L055MA2BC60P3C6C03GBA424224 90-L-055-MA-2-CD-80-P-4-C6-B-03-GBA-32-32-24 90L055MA2CD80P4C6B03GBA323224 90-L-055-MA-2-NN-80-L-3-C6-D-03-GBA-42-42-24 90L055MA2NN80L3C6D03GBA424224 90-L-055-MA-2-NN-80-P-4-S1-B-03-GBA-32-32-24 90L055MA2NN80P4S1B03GBA323224 90-L-055-MA-5-AB-60-P-3-C6-C-C6-GBA-42-42-24 90L055MA5AB60P3C6CC6GBA424224 90-L-055-MA-5-BB-60-S-4-C6-D-C5-GBA-32-32-24 90L055MA5BB60S4C6DC5GBA323224 90-L-055-MA-5-BC-60-S-3-C6-C-C5-GBA-35-35-24 90L055MA5BC60S3C6CC5GBA353524 90-L-055-MA-5-BC-60-S-3-C6-C-C5-GBA-38-38-24 90L055MA5BC60S3C6CC5GBA383824 90-L-055-MA-5-BC-60-S-3-C6-D-C5-GBA-35-35-24 90L055MA5BC60S3C6DC5GBA353524 If the axial piston pump is not draining oil, it may be due to various reasons, such as: Insufficient Inlet Flow: The pump may not be receiving enough oil from the reservoir due to a clogged inlet filter or low fluid level in the reservoir. The solution is to clean or replace the inlet filter or add more fluid to the tank. Damaged oil inlet hose or line: If the oil inlet hose or line is damaged, it can cause an air leak that prevents the pump from drawing in enough oil. The solution is to repair or replace damaged hoses or lines. Damaged or worn pump components: Pump components such as pistons, cylinders, valve plates, or swash plates may be worn or damaged, preventing the pump from discharging oil. The solution is to repair or replace damaged parts. Insufficient or Excessive Pressure: If the system pressure is too low, the pump may not be able to discharge oil. Also, if the system pressure is too high, it will cause the pump to stall. The solution is to adjust the pressure relief valve to ensure that the system pressure is within the recommended range. Blocked discharge hose or line: The discharge hose or line may be blocked, preventing oil from flowing from the pump. The solution is to clean or replace clogged hoses or lines. Cavitation: Cavitation can occur if the pump is running at high speed or if there is air in the system. This could damage the pump and prevent it from draining oil. The solution is to reduce the speed of the pump and bleed the air out of the system. In summary, it is important to maintain and inspect your axial piston pump regularly to ensure it is functioning properly and to prevent any problems that could lead to insufficient oil discharge. An axial piston pump may not drain oil for several reasons: Clogged or air leaking oil suction line: If the oil suction line is blocked or air leaks into the system, it will cause insufficient oil discharge. Check the suction pipe for any blockage or damage and repair or replace if necessary. Also, check the suction line gaskets and seals for any leaks. 90-L-055-MA-5-BC-60-S-4-C6-C-C5-GBA-32-32-24 90L055MA5BC60S4C6CC5GBA323224 90-L-055-MA-5-BC-60-S-4-C6-C-C5-GBA-40-40-24 90L055MA5BC60S4C6CC5GBA404024 90-L-055-MA-5-BC-60-S-4-S1-C-C5-GBA-35-35-24 90L055MA5BC60S4S1CC5GBA353524 90-L-055-MA-5-CD-60-S-3-C6-C-C5-GBA-42-42-24 90L055MA5CD60S3C6CC5GBA424224 90-L-055-MA-5-NN-60-S-3-C6-C-C5-GBA-35-35-24 90L055MA5NN60S3C6CC5GBA353524 90-L-055-MA-5-NN-80-R-3-S1-C-C5-GBA-26-26-24 90L055MA5NN80R3S1CC5GBA262624 90-L-055-MA-5-NN-80-S-3-S1-C-C5-GBA-35-35-24 90L055MA5NN80S3S1CC5GBA353524 90-L-055-MA-5-NN-80-S-3-S1-C-C5-GBA-42-42-24 90L055MA5NN80S3S1CC5GBA424224 90-L-075-DC-1-AB-60-S-3-C7-D-GB-GBA-42-42-24 90L075DC1AB60S3C7DGBGBA424224 90L075-DC-1-AB-60-S-3-C7-D-GB-GBA-42-42-24 90L075DC1AB60S3C7DGBGBA424224 Faulty oil inlet valves: If the oil inlet valves are not working properly, they may not be able to let enough oil into the pump, resulting in insufficient oil discharge. Inspect the inlet valve for damage or wear and replace if necessary. Worn pump components: If the pistons, cylinder block, or other pump components are worn, they may not be able to generate enough pressure to expel the oil. Check pump parts for wear and replace if necessary. Insufficient oil supply: If the oil in the tank is insufficient, it may not reach the pump and cause insufficient oil discharge. Check the oil level in the tank and add more oil as needed. Insufficient pump speed: If the pump speed is too low, it may not be able to generate enough pressure to expel the oil. Check the pump speed and adjust it to the proper level. To solve these problems, it is very important to check and maintain the axial piston pump and its components regularly. Proper maintenance can prevent these problems and ensure efficient pump operation.