Principle of the hydraulic motor
A hydraulic motor is like a machine that uses the power of flowing liquid (usually oil) to turn something, like a wheel. It works based on the principle that when you push oil into it, it makes the motor spin and do useful work, like moving a machine or vehicle. So, you can think of it as using the force of liquid to create motion.
Hydraulic motors and hydraulic pumps have the same working principle. They both achieve energy conversion through volume changes in the sealed working chamber.
In principle, all forms of hydraulic pumps and hydraulic motors are the same. But, valve-type hydraulic pumps (one-way) are not universal.