Sorry, but I don't understand what exactly you want to do.
Do you have 4 xChart objects?
Do you want to hide the y axis scale? This is currently not possible.
Or do you want to hide the Yaxis name? Set the Yaxis name property to an empty string xChart1.
Sorry, my bad, it is possible!
Didn't remember that I added the possibility in version 5.5.
You can disable the display of either the X or Y axis scale with the DrawXScale and DrawYScale properties.
You can set those either in the Designer or in the code with Set LineChart1.DrawYScale = False.