hi all

need a bit of help, have a Cesab reach truck RMG20-2, approx 25 year old, need to fill the brake fluid up, the resovoir top states, it is Mobil Hydraulic brake fluid 550, spoke with mobil tech desk but might as well talk to the wall, does anyone know what it is, nothing comes up on the internet as to what it is, cesab in the uk does not know either

any help would be grateful

Martin