Jack is one of the most commonly used tools in repair work, the structure is compact and easy to use. But if the improper use will cause heavy collapse and injured human accident. Therefore, attention should be paid to the following problems in the use of:
(1) the bottom should be smooth and tough when using the jack. Oil free board to expand the bearing surface, to ensure safety. Can not be used to replace wooden plate, to prevent slipping.
(2) from the requirements of a smooth rise, the weight should be checked after a slight abnormal situation, such as no abnormal situation in order to continue to rise. Shall not be arbitrarily extended handle or too much operation.
(3) no overloading, super high. When the sleeve appears red, indicating that the rated height should be stopped.
(4) the number of Jack at the same time operations, there must be a person to command, so that the rise or fall in synchronization. Between the two adjacent jacks to support block, ensure intervals to prevent slipping.
(5) using the jack to always pay attention to the part of the seal and the pipe joint, it must ensure its safety and reliability.
(6) Jack does not apply to places with acid, alkali or corrosive gases.