# ISO 8426:1988 — Withdrawn and superseded ISO standards

For ISO 8426:1988, item title is Hydraulic fluid power — Positive displacement pumps and motors — Determination of derived capacity; status code is 9599; successor is ISO 8426:2008; withdrawn / published date is 1988-10-13, recorded from its source on 2026-08-05.

- **Identifier:** ISO 8426:1988 _(verified: appears in the quote below)_
- **Item title:** Hydraulic fluid power — Positive displacement pumps and motors — Determination of derived capacity _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 8426:2008
- **Withdrawn / published date:** 1988-10-13 _(verified: appears in the quote below)_

## What the source says

> 15604,IS,,ISO 8426:1988,Hydraulic fluid power — Positive displacement pumps and motors — Determination of derived capacity,Transmissions hydrauliques — Pompes et moteurs volumétriques — Détermination de la cylindrée mesurée,1988-10-13,1,['23.100.10'],ISO/TC 131/SC 8,9599,,[40351],"['en','fr']",9,"<p>Specifies the methods for determining the derived capacity under steady-state conditions and at defined, continuously rotating shaft speeds. The unit may be tested as a pump, with mechanical energy applied to the shaft and hydraulic energy obtained at the fluid connections, or as a motor, with the hydraulic energy supplied to the fluid connections and mechanical energy obtained at the shaft. Accu

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).