After disassembling the stainless steel gear oil pump, the order is not paid attention to. Some parts seem to have no direction on the surface, and they can be installed at a glance, but they are not. For example, the back end cover of a stainless steel gear pump has a special pressure relief groove inside the end cover. If you look at it alone, the outside is the same, but if it is installed up and down, it will increase the noise of the SS gear oil pump and shorten the sealing life of the SS gear pump. The disassembly and assembly of SS gear pumps must be in strict accordance with the sequence, and must be assembled according to standard methods and the correct process sequence, otherwise the stainless steel gear oil pumps will not operate normally.