Having worked around the Dangerous Goods enviroment for many years here is my slant on this one. With an MSDS(Material Safety Data Sheet) the important section for all modes of transport is section 14 - Transport, in this case it says not regulated therefore it is non dangerous for any form transport. This is only the hydraulic fluid, but as stated the fluid is not under pressure in this unit then EZY do not have the fall back of any DG regulations they only have the carriers choice to not carry these items.