The effect of hydraulic bottle jack is mainly lifting. It is very risky to drop suddenly after the hydraulic jacks are lifted up. Such a drop is likely to cause casualties. After years of experience, we have summarized four reasons why hydraulic jacks cannot be lifted up or dropped suddenly.
First, there is very little hydraulic oil in the hydraulic jack, so I don't understand the operating specifications of the hydraulic jack. Before use, check whether the hydraulic oil is safe to use.
Second, the sealing ring of the hydraulic jack was damaged, showing an oil leak. Before use, strictly check the sealing ring.
Third, the tonnage of the hydraulic jack is too large, and the pressure of the oil cavity exceeds the load of the seal, causing the seal to leak.
Fourth, the inner wall of the hydraulic cylinder of the hydraulic jack showed rust spots and dropped. Affected the degree of sealing. Before use, check the inner wall of the hydraulic cylinder.
There are mechanical jacks and hydraulic jacks. The principles are different. In principle, the most basic principle based on hydraulic transmission is the Pascal principle. That is to say, the pressure of the liquid is the same everywhere, so that in a balanced system Among them, the pressure exerted on the smaller piston is smaller, and the pressure exerted on the larger piston is also larger, which can keep the liquid still. Therefore, through the transfer of liquid, different pressures on different ends can be obtained, so that a transformation can be achieved.
The hydraulic bottle jack that we often see uses this principle to achieve force transmission. The mechanical principle of the screw jack, reciprocatingly pull the handle, pull the pawl to push the ratchet gap to rotate, and the small bevel gear drives the large bevel gear to rotate the lifting screw, so that the lifting sleeve can be lifted or lowered to achieve the function of lifting tension . But it is not as simple as a hydraulic jack.
Tighten the oil return valve clockwise with the handle, and move the handle up and down. The jack head should be placed under the correct lifting position of the load until the head touches the load and lift the load to the desired height, such as heavy objects. When working under (vehicle), the safety support should be placed in the correct position under the load, then the load should be transferred to the safety support and the jack should be removed. After use, lift the load with a jack, and then remove the safety bracket. Rotate the handle counterclockwise very slowly and loosen the oil return valve to make the head drop steadily. The oil return valve does not rotate more than one revolution.
During daily use, attention should be paid to maintenance, proper lubrication and rust prevention. When rust or corrosion occurs, wipe it with oil cloth. When the jack is not in use, always lower its head and push hands to the lowest position. A little lubricating grease should be injected into each rotating part of the jack to enhance the durability of the product and increase the service life.
The oil return valve set by the jack plays the role of oil return. In normal use, the oil return valve is closed tightly. When the oil return valve is opened, the oil in the working chamber passes through the oil return valve to the oil storage chamber. At this time, the jack returns to its original state and stops working. The pressure regulating valve plays a role in preventing overload, so that the jack can work within the rated lifting capacity to prevent danger caused by overload. For more information about hydraulic jacks, please contact us, we will provide you with the best quality products.