The slow speed of the cylinder body during the return stroke of the hydraulic pump may be caused by the following factors: 1. The viscosity of the hydraulic oil is too high or polluted The hydraulic pump needs the support of hydraulic oil when it works. If the viscosity of the hydraulic oil is too high, the oil temperature is too low, or the hydraulic oil is seriously polluted, the flow will be insufficient and the output pressure of the pump will be unstable, which will affect the return speed of the cylinder. Solution: It is necessary to replace the new clean hydraulic oil and keep the cleanliness of the hydraulic oil. When using the hydraulic system, it is also necessary to clean the hydraulic oil tank and replace the oil filter in time. 2. The internal damage of the hydraulic pump Damage to internal components of the hydraulic pump such as plungers, gears, and oil seals will also lead to insufficient output flow of the hydraulic pump, which will affect the return speed of the cylinder. Solution: The hydraulic pump needs to be thoroughly inspected, and any damaged parts need to be replaced in time. 3. The hydraulic control valve is not working properly The speed control in the return stroke of the hydraulic pump speed regulation is realized through the adjustment of the hydraulic control valve. If the interior of the hydraulic control valve is damaged or the parts are damaged, it will cause insufficient pump flow, which will affect the speed of the return stroke of the cylinder. Solution: It is necessary to check the working condition of the hydraulic control valve, and if the problem is found, the damaged part inside the hydraulic control valve needs to be replaced in time. 90R130-KA-5-CD-80-R-3-F1-H-03-GBA-35-35-24 90R130KA5CD80R3F1H03GBA353524 90-R-130-KA-5-CD-80-R-3-F1-F-05-GBA-35-35-20 90R130KA5CD80R3F1F05GBA353520 90R130-KA-5-CD-80-R-3-F1-F-05-GBA-35-35-20 90R130KA5CD80R3F1F05GBA353520 90-R-130-KA-5-CD-80-R-3-C8-H-03-GBA-29-29-30 90R130KA5CD80R3C8H03GBA292930 90R130-KA-5-CD-80-R-3-C8-H-03-GBA-29-29-30 90R130KA5CD80R3C8H03GBA292930 90-R-130-KA-5-CD-80-R-3-C8-H-00-GBA-35-14-24 90R130KA5CD80R3C8H00GBA351424 90R130-KA-5-CD-80-R-3-C8-H-00-GBA-35-14-24 90R130KA5CD80R3C8H00GBA351424 90-R-130-KA-5-CD-80-R-3-C8-F-04-GBA-42-42-24 90R130KA5CD80R3C8F04GBA424224 90R130-KA-5-CD-80-R-3-C8-F-04-GBA-42-42-24 90R130KA5CD80R3C8F04GBA424224 90-R-130-KA-5-CD-80-R-3-C8-F-03-GBA-42-42-24 90R130KA5CD80R3C8F03GBA424224 4. Improper adjustment of speed adjustment screw In the return stroke of hydraulic pump speed regulation, the adjustment of the speed regulating screw is very important. If it is not adjusted properly, the pump flow will be insufficient, which will affect the speed of the return stroke of the cylinder. The governor screw is often one of the most overlooked parts of the problem. Solution: The speed control screw adjustment of the hydraulic pump needs to be rechecked to ensure that it is adjusted correctly. 5. Hydraulic cylinder seals are aging or damaged If the seal of the hydraulic cylinder is aged or damaged, it will cause leakage inside the cylinder, which will affect the return speed. At this time, it is necessary to check the seals of the hydraulic cylinder, such as seal rings, oil seals, etc., and replace them in time if any problems are found. 6. Hydraulic pump suction or air intrusion into the system If the hydraulic pump sucks in air or air intrudes into the system, it will lead to unstable system pressure and insufficient flow, which will affect the return speed of the hydraulic cylinder. At this time, the hydraulic system needs to be checked, and problems found need to be eliminated in time. 7. The plunger pump and the moving parts are matched incorrectly The output flow of the plunger pump is determined by the diameter of the plunger and the fit clearance between the moving parts. If the plunger pump is not matched with the moving parts, it will cause insufficient pump output flow, which will cause the cylinder to return slowly. At this time, it is necessary to check whether the matching of the hydraulic pump and the moving parts is appropriate. 90R130-KA-5-CD-80-R-3-C8-F-03-GBA-42-42-24 90R130KA5CD80R3C8F03GBA424224 90-R-130-KA-5-CD-80-P-4-F1-H-03-GBA-32-32-24 90R130KA5CD80P4F1H03GBA323224 90R130-KA-5-CD-80-P-4-F1-H-03-GBA-32-32-24 90R130KA5CD80P4F1H03GBA323224 90-R-130-KA-5-CD-80-P-4-F1-F-03-GBA-42-42-24 90R130KA5CD80P4F1F03GBA424224 90R130-KA-5-CD-80-P-4-F1-F-03-GBA-42-42-24 90R130KA5CD80P4F1F03GBA424224 90-R-130-KA-5-CD-80-P-4-C8-H-03-GBA-42-42-24 90R130KA5CD80P4C8H03GBA424224 90R130-KA-5-CD-80-P-4-C8-H-03-GBA-42-42-24 90R130KA5CD80P4C8H03GBA424224 90-R-130-KA-5-CD-80-P-4-C8-F-03-GBA-42-42-24 90R130KA5CD80P4C8F03GBA424224 90R130-KA-5-CD-80-P-4-C8-F-03-GBA-42-42-24 90R130KA5CD80P4C8F03GBA424224 90-R-130-KA-5-CD-80-P-4-C8-F-03-GBA-35-35-24 90R130KA5CD80P4C8F03GBA353524 8. Blockage or leakage of hydraulic lines If the hydraulic lines in the hydraulic system are blocked or leaked, the fluid flow will be blocked or reduced, which will affect the return speed of the hydraulic cylinder. At this time, it is necessary to check whether the pipeline is blocked or leaking, and eliminate the problem in time. 9. The working load of the hydraulic cylinder is too large If the working load of the hydraulic cylinder is too large, the output flow of the hydraulic pump will be insufficient, which will affect the return speed of the cylinder. At this time, it is necessary to check the working load of the hydraulic cylinder, such as whether the load is too heavy, whether the working method is correct, etc. 10. The oil inlet or outlet of the hydraulic pump is blocked If the oil outlet or inlet of the hydraulic pump is blocked, the output flow of the hydraulic pump will be insufficient, which will affect the return speed of the cylinder. At this time, it is necessary to check whether the oil inlet or outlet of the hydraulic pump is blocked, and clean it in time. In short, to eliminate the slow speed failure of the cylinder body during the return stroke of the hydraulic pump speed regulation, rich experience and professional knowledge are required. If you are not sure how to troubleshoot, it is recommended to find professional hydraulic maintenance personnel to check and deal with it. At the same time, in daily use, the maintenance of the hydraulic system should also be strengthened, the hydraulic oil should be replaced regularly, the hydraulic components should be checked, and the hydraulic pipeline should be cleaned in time to reduce the possibility of failure.