Nothing is set in stone, as the manual hydraulic pump design is the same, always in the same position would be eliminated, so we have to continue to study and improve! (L) Improved manual pump design. After much argument fine hand pump, and finally the use of advanced priority valve with load sensing hydraulic steering gear in the form of the new system in accordance with the requirements of the steering, assign priority traffic, regardless of load size, wheel speed level can ensure adequate oil supply the remainder can all work equipment supply circuit use, thereby eliminating the steering circuit power loss caused by excessive oil hand pumps, improve system efficiency and reduce the hydraulic pressure of work. (2) optimize the design of the boom cylinders and hydraulic modeling, reduce system operating pressure. By optimizing the computing boom cylinder with standard series 80/4. Displacement hydraulic pump by 10ml / r increased to 14ml / r, the system set pressure is 14MPa, to meet the boom cylinder lifting force and speed requirements. (3) hand pump should also be noted in the course of the proper use and maintenance of loaders, hydraulic oil regularly add or replace, maintain the cleanliness of hydraulic oil, strengthen the routine inspection and maintenance. Failure when high pressure hand pump discharge pressure high pressure hand pump commutation prone Gao pressed by switching to almost zero pressure, or quickly switch from zero pressure rose to Gao press, certainly in the high pressure hand pump shut commutation hydraulic shock generated when switching. At the moment the hand pump is very prone to failure, such a failure in our attention to the next is fully capable avoided. Meanwhile, due to high pressure hand pump solenoid valve switches quickly, no buffer time, they forced the hydraulic shock intensifies, lest the solenoid valve replaced three electro-hydraulic valve, due to the electro-hydraulic valve in the liquid an adjustable valve to change the time, there is some buffer commutation time, the outlet pressure of the pump there is a rise or fall changing process, mention Gao the commutation stationarity, thereby avoiding significant pressure shocks. Loop-way valve is the role of the pump unloading pressure when there is still some value (0.2 ~ 0.3Mpa), for control of the oil maneuvering. The above is the high pressure hand pump at the commutation prone to failure, because the hydraulic system does not allow hydraulic shock phenomenon, precision impact will affect any small parts. For construction machinery hydraulic systems SBD14E manual pump, usually Gao pressure, high flow systems, valves using M-type manual pump prices higher, due to the hydraulic system, the valves are generally manually, change When the valve is switched to the cushioning effect is achieved by the operator. High pressure hand pump valve is a valve port orifice, manipulating personnel in the manipulation of hand 抦 should gradually opening the valve to open or close, to avoid the formation of hydraulic shock. SYB-2 manual pump _ _ hand pump hydraulic force provided by the Texas Lu Lu force hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) strong, credible, in Dezhou hydraulic machinery and components industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Lu Hydraulic and you hand into the brilliant, for a better future!