Swash plate axial piston pumps are commonly used in various hydraulic systems. When your swash plate axial piston pump isn't working properly, there are a few troubleshooting steps you can follow to diagnose and fix the problem. Here are some common problems and their possible causes: Insufficient Flow: If the pump is not delivering enough flow, check the following: Make sure the pump inlet is not blocked or restricted. Check the pump speed to make sure it is running at the correct speed. Check the pump for leaks or worn parts. Check the fluid viscosity to make sure it is within the pump's specified range. Low Pressure: If the pump is not delivering enough pressure, check the following: Make sure the pump outlet is not blocked or restricted. Check the pump for leaks or worn parts. Check the pump for damage to the pistons or swash plate. Check the pump for insufficient fluid supply. Noisy Operation: If the pump is making unusual noises, check the following: Check the pump for cavitation or fluid aeration. Check the pump for damage to the pistons or swash plate. Check the pump for worn bearings or other parts. Check pump for insufficient fluid supply or blocked inlet. 90R250-KA-2-NN-80-S-4-C8-K-03-NNN-38-38-30 90R250KA2NN80S4C8K03NNN383830 90-R-250-KA-2-NN-80-S-4-C8-K-03-NNN-35-35-28 90R250KA2NN80S4C8K03NNN353528 90R250-KA-2-NN-80-S-4-C8-K-03-NNN-35-35-28 90R250KA2NN80S4C8K03NNN353528 90-R-250-KA-2-NN-80-S-3-C8-K-03-NNN-42-42-28 90R250KA2NN80S3C8K03NNN424228 90R250-KA-2-NN-80-S-3-C8-K-03-NNN-42-42-28 90R250KA2NN80S3C8K03NNN424228 90-R-250-KA-2-EG-80-T-4-C8-K-03-NNN-42-42-28 90R250KA2EG80T4C8K03NNN424228 90R250-KA-2-EG-80-T-4-C8-K-03-NNN-42-42-28 90R250KA2EG80T4C8K03NNN424228 90-R-250-KA-2-CD-80-T-4-C8-J-03-NNN-26-26-28 90R250KA2CD80T4C8J03NNN262628 90R250-KA-2-CD-80-T-4-C8-J-03-NNN-26-26-28 90R250KA2CD80T4C8J03NNN262628 90-R-250-KA-2-CD-80-T-4-C8-J-03-NNN-26-26-26 90R250KA2CD80T4C8J03NNN262626 Overheating: If the pump is running too hot, check the following: Check pump cooling system for blockage or restriction. Check the pump for worn bearings or other parts. Check pump for insufficient fluid supply or blocked inlet. Check pump for incorrect fluid viscosity or incorrect fluid type. Excessive Leakage: If the pump is leaking excessively, check the following: Check the pump for damaged seals or gaskets. Check the pump for worn parts such as pistons or swashplates. Check pump for insufficient fluid supply or blocked inlet. Check pump for incorrect fluid viscosity or incorrect fluid type. By following these troubleshooting steps, you can diagnose and fix common problems with swash plate axial piston pumps. If you are unsure about any of these steps, or if the problem is more complex, consult a qualified technician or the pump manufacturer for assistance. Uneven flow: If the pump is delivering uneven flow, check the following: Inspect the pump for damaged or worn parts such as pistons or swash plate. Check pump for blockage in fluid passages or inlet/outlet ports. Check for uneven pressure on the inlet side of the pump. Excessive Vibration: If the pump vibrates excessively, check the following: Check for pump misalignment or unbalanced rotating parts. Check the pump for worn bearings or other parts. Check the pump mounting and support structure for damage or looseness. Check fluid supply for contamination or over-aeration. Pump not building pressure: If the pump is not building pressure, check the following: Check the pump for damaged or worn swashplates or pistons. Check the pump for air leaks or cavitation. Check pump inlet or outlet for blockage. Check the pump for insufficient fluid supply. 90-R-250-KA-2-CD-80-S-3-C8-K-03-NNN-38-38-30 90R250KA2CD80S3C8K03NNN383830 90R250-KA-2-CD-80-S-3-C8-K-03-NNN-38-38-30 90R250KA2CD80S3C8K03NNN383830 90-R-250-KA-2-CD-80-S-3-C8-K-03-NNN-38-38-24 90R250KA2CD80S3C8K03NNN383824 90R250-KA-2-CD-80-S-3-C8-K-03-NNN-38-38-24 90R250KA2CD80S3C8K03NNN383824 90-R-250-KA-2-CD-80-S-3-C8-J-03-NNN-35-35-24 90R250KA2CD80S3C8J03NNN353524 90R250-KA-2-CD-80-S-3-C8-J-03-NNN-35-35-24 90R250KA2CD80S3C8J03NNN353524 90R250-KA-2-BC-80-T-4-C8-K-03-NNN-42-42-28 90R250KA2BC80T4C8K03NNN424228 90-R-250-KA-2-BC-80-T-3-C8-K-00-NNN-35-35-24 90R250KA2BC80T3C8K00NNN353524 90R250-KA-2-BC-80-T-3-C8-K-00-NNN-35-35-24 90R250KA2BC80T3C8K00NNN353524 90-R-250-KA-2-BC-80-D-3-F1-L-03-NNN-42-42-24 90R250KA2BC80D3F1L03NNN424224 When troubleshooting a swash plate axial piston pump, it is important to follow the manufacturer's guidelines and recommendations. Plus, proper maintenance, including regular fluid changes and filter changes, can help prevent many common problems. Excessive noise: If the pump is making excessive noise, check the following: Check the pump for damaged or worn swashplates or pistons. Check the pump for air leaks or cavitation. Check pump inlet or outlet for blockage. Check the pump for low fluid or contaminated fluid. Pump does not start: If the pump does not start, check the following: Check the pump for air leaks or cavitation. Check pump inlet or outlet for blockage. Check the pump for insufficient fluid supply. Check the pump for damaged or worn swashplates or pistons. When troubleshooting a swash plate shaft pump, it is important to take proper safety precautions and follow the manufacturer's guidelines. Some pumps may require specialized tools and training to be properly diagnosed and serviced. If you are unsure about any of these steps, or if the problem is more complex, consult a qualified technician or the pump manufacturer for assistance.