In the maintenance manual hydraulic pump from the following to find the cause, and to improve the system: 1. Check the boom cylinder internal leakage situation. The easiest way is to raise the boom, to see whether there is a significant decline in freedom 2, if you disassemble the fuel tank to check the whereabouts of obvious, such as worn seals should be replaced. 3, check the control valve. First clean the safety valve, check valve wear hand pump manufacturers, such as wear and tear should be replaced. 4. If there is still no change after the valve is installed, and then check the control valve spool wear, the gap is generally limits the use of 0.06mm SBD14E hand pumps, severe wear and tear should be replaced. 5, the measurement manual hydraulic pressure. If the pressure is low, then make adjustments, plus the pressure is still not up to manually adjust the pump, then a manual pump badly worn Features: small size, light weight, compact, easy to operate SBD20D hand pumps, high pressure, low flow, can preparation of low-pressure pump to improve efficiency. On the basis of the crude way, increase the variety of hydraulic components. Such as solenoid valve, pressure switch, remote control switch, hydraulic lock. Can be used at any pressure within the rated pressure. Purpose: The company's products can be directly pressure test on pressure vessel, equipped with special tools for lifting, bending, straightening, pressing, cutting, riveting, lifting, stretching, disassembly, punching and other kinds of jobs. SBD14E hand pumps, hydraulic power Lu (certified), hand pump provided by Lu of hydraulic equipment plant in Texas. Texas Lu force hydraulic machinery plant (www.luliyeya.com) is a leader in Dezhou, hydraulic machinery and parts, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lu Hydraulic leadership with the staff warmly welcome all inquiries negotiations to create Lu hydraulic force a better future.