Thanks for the video.
For a vvvf controlled direct hydraulics the car bounces too much when stopping.
What is the condition of the oil, are there small bubbles (like foam), color?
Oil level in the tank with the pistons extended?
Close the ball valve and load the car. If it still compresses that much there’s air in the line. If not, there’s air in the valve.
additionally check if the car keeps sinking (wait 5-10min) to rule out leakage from L10 unit and or ball valve (don't forget to turn off main switch
)
