A trailer jack with wheels is a highly practical tool that assists in towing or tire replacement when vehicles break down. Below are instructions on how to make a pulley for a trailer jack with wheels.Firstly, we need to prepare the following materials and tools:Materials: Steel pipe, flat iron, ste

The utility model relates to a trailer jack, which can support the trailer when the trailer and the tractor are off, and the structure includes an outer cylinder, an inner cylinder, a screw, a handle, a nut, a bearing, a tripod and a castor, etc. The rotating motion of the screw is converted into an

1) Before use, check that all parts are in good condition and the oil is clean. It is strictly forbidden to use the safety plug of the hydraulic jack if it is damaged, or the thread of the screw and rack jack is 20%.2) The jack should be placed in a flat, solid place and leveled with a mat.3) The ja

The jacks are divided into two types: Mechanical jacks and hydraulic jacks. The principles are different. In principle, the hydraulic jack is based on the Pascal principle, that is, the pressure across the liquid is uniform, so that in a balanced system, the pressure exerted on the smaller piston is

1. It is necessary to check whether the parts are normal before use.2. When using, the provisions of the main parameters should be strictly observed. Avoid excessive overload. Otherwise, when the lifting height or lifting tonnage exceeds the specified level, serious oil leakage will occur at the top