ISO 4926:1978

Road vehicles — Hydraulic brake systems — Non-petroleum base reference fluids

Specifies the composition and some characteristics of two reference fluids used for the testing of hydraulic braking systems and components mounted on road vehicles. Tabulates the 24 constituents and their composition by mass % for the ISO compatibility fluid, and the 6 constituents and their composition by mass % for the ISO fluid for storage corrosion test.