hitachi hydraulic pump parts:

1. The composition of the external feedback pressure-limiting variable vane pump: shell, bushing, stator, pump shaft, rotor, flow adjustment screw, control piston, needle roller bearing, slider, pressure limiting spring, pressure adjustment screw;

2. The hydraulic pump is a hydraulic power component in the hydraulic system. Its function is to convert the mechanical energy of the system {internal combustion engine or motor} into liquid pressure, and it is the power source of the hydraulic system. Hydraulic pump can be divided into tooth cooling pump, vane pump, plunger pump according to the structure;

3. There are many different uses of each pump. According to the different circuits, it can be divided into open pump, closed pump and so on. The core principle of hydraulic pump {Pastor's principle}: the liquid pressure is equal everywhere. That is, the pressure in the working pump cavity changes and reciprocates the oil suction and oil discharge.

Kyushan got all kinds of Hitachi excavator hydraulic pumps and pump parts for sale， you can send your inquiries with the excavator model numbers you need， we will reply as soon as possible.