Hydraulics are a wonder of modern engineering that has actually been around for quite some time. The first hydraulic patent was written in 1795 in the form of a hydraulic pump, and that same general idea has been used in many applications since. The concept of hydraulic repair has been around ever since people realized how easily these systems can fail.
The basic hydraulic system works by using a fluid's inability to compress.
A force applied to the large side of a pressure system on a fluid will be multiplied on the opposite side if it's smaller than the original side. This allows a relatively small force to move a relatively large object.
Things have to be working in an exact fashion to make the machine work at all. Tolerances are set to an absolute minimum because if pressure were to be lost, the pump would just leak fluid and do absolutely nothing. Of course, parts are machined to that tolerance, but if any damage were to occur in the meantime, it would require a full hydraulic repair to get the machine back in working order.
This not only includes patching any holes in the system but also ensuring tolerances are set back to factory-perfect levels so failures are less likely in the future. A hydraulic service requires a skilled professional to ensure everything goes smoothly and the problem is fixed.
