What to do if a Rexroth piston pump is noisy? -Autosys Hydraulics

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The hydraulic pump is the power element of a hydraulic system, and it serves as the heart of such a system; once the pump fails, the system cannot function properly. Most of our hydraulic systems use piston pumps (and among these, Rexroth piston pumps account for the largest share), so it is essential to understand the faults associated with piston pumps for future use in hydraulic systems. Loud noise is a problem we often encounter. 　　There is air in the oil pump. This fault usually occurs when a new pump is installed. When starting a new pump, oil should first be added to it to lubricate the pump’s bearings, pistons, and cylinder barrel. 　　Solution: Open the oil pump filling port while the pump is running to allow the air inside the pump to be expelled through the filling port. 　　The fuel level in the tank is too low; the clogged fuel suction pipe increases the resistance to fuel absorption, resulting in the pump drawing in air, or there is a leak in the fuel intake pipe, allowing air to enter the pump. 　　Treatment method: Add sufficient fluid ； Clean the filter and clear the intake pipes ； Check and tighten the connection screws of the oil inlet pipe section. 　　The oil pump and motor are not installed properly; in other words, the coaxiality between the pump shaft and the motor shaft is incorrect, which causes radial forces to act on the oil pump bearings and results in noise. 　　Solution: Check and adjust the concentricity of the oil pump and motor installation. The high viscosity of the hydraulic oil reduces the pump’s self-priming ability and lowers its volumetric efficiency. 　　Solution: Choose hydraulic oil with an appropriate viscosity; if the oil temperature is too low, use a heater. The information in the above text was provided by the technical staff of Shenzhen Autosys Hydraulic Machinery Co., Ltd., outlining methods for dealing with excessive noise in Rexroth piston pumps. As a professional agent for Rexroth piston pumps, we offer a comprehensive range of products. You can visit our official website at http://www.aotuoshi.com/ to learn more relevant information