Pump noise is inherent in the original pump manufacturing technology has not yet reached the "robustness" requirement. Pump works in terms of roller hydraulic repair factory, the pump shaft each revolution, each pump plunger only have to make one cycle suction pressure of the oil. Hydraulic roller plunger suction pressure maintenance organizations to complete the assignment process oil, when the rotation after the transition to the drain region on the cylinder plunger bore suck oil from the oil suction port plate on the window of time, full of low-pressure oil the plunger bore to be immediately before the window with the high-pressure oil drain valve plate on the inside on (see figure roller hydraulic maintenance phone to Kawasaki K3V pump valve plate, for example) roller hydraulic maintenance, ranked within the oil window high pressure oil into the cylinder bore of the plunger from a pre-boost `secondary throttle hole and triangular groove to increase the hydraulic cavity formed intrusion traffic impact (see Figure II left) hydraulic system pressure shocks: hydraulic systems due to the frequent commutation, at a higher pressure suddenly start pump or close the valve and cylinder fast action will cause the instantaneous peak pressures of up to several times the working pressure, sometimes enough to make seals, pipes or other damage caused by leakage of hydraulic components. Roller hydraulic maintenance | Yan'an roller hydraulic service | Xi'an Chengtong hydraulic service from Xi'an Chengtong hydraulic maintenance Limited. Roller hydraulic maintenance | Yan'an roller hydraulic service | Xi'an Xi'an Chengtong hydraulic maintenance hydraulic maintenance Ltd. Chengtong (www.huosu360.com) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: the money work.