Industrially speaking, there are at least a half-dozen different sub-types of hydraulic pumps. There are also several reasons why your plant opted to use rotary pumps over reciprocating pumps, or positive displacement pumps over non-positive displacement pumps. Now that one or more of these pumps in your plant is having problems, you are looking at a total replacement versus a hydraulic pump rebuild for each affected pump. You will need a highly qualified and experienced mechanical engineer for the job. You will also need to know why a hydraulic pump rebuild is such a complicated process.
All Hydraulic Pumps Use Different Parts
Perhaps the leading problem of all hydraulic pump rebuilds is the fact that no two pumps use the same parts. The hydraulic pressure builds up inside these various pumps in different ways. A rotary pump, for example, uses two rotary gears spinning in opposite directions against each other to create the pressure needed to move a liquid from the inlet port to the outlet port.
These gears wear down, usually not in an equal fashion. Then you have to take the pump apart, find twin gears that will not only fit the pump, but will also move effectively with each other once they are in the pump, and then test the pump after reinstallation to make sure it is running properly. Of course, rotary pumps do not use gears exclusively. They may also use pistons and the like that move in circles as well, in which case, you do not know what you have until you open the pump up to see what is inside.
It Is Harder to Find Parts for Older Pumps
Hydraulic pump design has dramatically improved over the decades. That said, if you are trying to rebuild an older pump, you may be at a loss. The older pump parts are not going to be quite so easy to acquire. Your engineer may have to do a total rebuild of the pump from the inside out using modern parts or modified modern parts to achieve a fully restored and functional pump.
A Rebuilt Pump May Affect How the Rest of the Plant's Connected Machinery Works
A rebuilt pump is connected to the machinery behind it and ahead of it. To rebuild a pump and not have it negatively impact the rest of the machinery to which the pump is connected, is a very complicated problem. The mechanical engineer has to solve this problem by first knowing and understanding the pressure of the previous pump, and then rebuilding the pump to operate in much the same way so that the rest of the surrounding machinery continues to work as expected.
Contact hydraulic pump rebuild service for more information and assistance.