Hydraulic jack, also known as "hydraulic jack", only has a lifting mechanism for lifting heavy objects. When working, as long as the handle is pulled back and forth, the manual oil pump continuously presses oil into the cylinder. In the case of a sea wind wind electric jack, due to the continuous increase of oil pressure in the cylinder, the piston and the weight on the piston are forced to move upwards together. The working medium of the hydraulic jack is YB-N32 hydraulic oil. When the ambient temperature is below 10 ° C, YB-N22 hydraulic oil can be used instead. When the ambient temperature is above 40 ° C, YB-N46 hydraulic oil can be used instead. During operation, the liquid level of the fuel tank should always be kept at the centerline of the oil mark to prevent the oil pump from being sucked out. When refueling, use a 120 mesh oil filter to remove impurities from the new oil. When frequently used, clean the oil filter every two months, clean the oil tank every six months, and replace it with new oil. The normal operating temperature of the oil pump is 10 ° C-50 ° C. If the oil temperature is too high, cooling measures or pump shutdown should be taken. If the oil temperature is too low, heating measures or low-pressure operation should be taken to increase the oil temperature. Before starting the motor, it is necessary to shift the directional valve to the middle position. Jog several times to prevent the high-pressure pump from being sucked out, and use only after the air is removed. After lifting, it can be quickly removed, but the connected hose cannot be used to pull the ultra-high pressure and large tonnage electric jack. When users use it for a long time, they should pay attention to regular inspections, which should be conducted every six months. When conducting a pressure test, if leakage, protrusion, or explosion occurs, it must be replaced. Instructions for using hydraulic jacks

　　When hydraulic jacks are used for lifting operations, they should be selected with appropriate tonnage and should not exceed their load-bearing capacity.

　　If multiple hydraulic jacks are used to lift the same equipment, hydraulic jacks of the same model should be selected, and the total rated lifting weight of each hydraulic jack should not be less than 15 times the weight of the equipment it bears.

　　The hydraulic jack should be wiped clean before use, and all components should be checked for flexibility and damage. When there is a load, do not remove the quick connector to avoid accidents and damage to the components.

　　The hydraulic jack should be placed flat and not tilted before use, and the bottom should be leveled.

　　When using, the heavy object should be lifted partially first, and the hydraulic jack should be carefully checked for any abnormalities before continuing to lift the heavy object.

　　During the lifting process, a safety pillow wooden frame should be placed under the hydraulic jack in a timely manner as the weight continues to rise, to prevent accidents caused by the hydraulic jack tilting or causing the piston to suddenly drop.