# ISO 4926:1978 — Withdrawn and superseded ISO standards

For ISO 4926:1978, item title is Road vehicles — Hydraulic brake systems — Non-petroleum base reference fluids; status code is 9599; successor is ISO 4926:2006; withdrawn / published date is 1978-02-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4926:1978 _(verified: appears in the quote below)_
- **Item title:** Road vehicles — Hydraulic brake systems — Non-petroleum base reference fluids _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4926:2006
- **Withdrawn / published date:** 1978-02-01 _(verified: appears in the quote below)_

## What the source says

> 10941,IS,,ISO 4926:1978,Road vehicles — Hydraulic brake systems — Non-petroleum base reference fluids,Véhicules routiers — Freins hydrauliques — Liquides de référence à base non pétrolière,1978-02-01,1,"['75.120','43.040.40']",ISO/TC 22,9599,,[43023],"['en','fr']",2,"<p>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.</p>"

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).