# ISO 4392-1:1989 — Withdrawn and superseded ISO standards

For ISO 4392-1:1989, item title is Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and at constant pressure; status code is 9599; successor is ISO 4392-1:2002; withdrawn / published date is 1989-08-10, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4392-1:1989 _(verified: appears in the quote below)_
- **Item title:** Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and at constant pressure _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4392-1:2002
- **Withdrawn / published date:** 1989-08-10 _(verified: appears in the quote below)_

## What the source says

> 10291,IS,,ISO 4392-1:1989,Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and at constant pressure,Transmissions hydrauliques — Détermination des caractéristiques des moteurs — Partie 1: Essai à pression constante et basse vitesse constante,1989-08-10,2,['23.100.10'],ISO/TC 131/SC 8,9599,[10290],[34762],"['en','fr']",7,"<p>This part describes a method of determining the characteristics of motors, of either fixed or variable displacement types. The accuracy of measurements is divided into 3 classes, A, B, and C which are explained in annex A. Figure 1 shows a typical test circuit for bidirectional motor. The informative annex B contains the b

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).