The Drive Transmission Circuit; Power Unit : Axial-Piston Pump; Introduction - Etesia HYDRO 124D Technical Training Manual

3) The drive transmission circuit

Introduction

The drive transmission circuit is of the closed type. A closed circuit is defined as follows :
The supply is closed at once on the pump (1) and the hydraulic motor (2). There is no communication
between the power branches and the tank.
Diagram

3.1) Power unit : Axial-piston pump

The movement of the piston from the top to the bottom point increases the volume in its chamber. This
volume fills with oil. This is suction.
The movement of a piston from the bottom point to the top point reduces the volume of its chamber and
pushes out the oil. This is discharge.
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