# ISO 8643:2017 — Withdrawn and superseded ISO standards For ISO 8643:2017, item title is Earth-moving machinery — Hydraulic excavator and backhoe loader lowering control device — Requirements and tests; status code is 9599; successor is ISO 8643:2024; withdrawn / published date is 2017-02-02, recorded from its source on 2026-08-05. - **Identifier:** ISO 8643:2017 _(verified: appears in the quote below)_ - **Item title:** Earth-moving machinery — Hydraulic excavator and backhoe loader lowering control device — Requirements and tests _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 8643:2024 - **Withdrawn / published date:** 2017-02-02 _(verified: appears in the quote below)_ ## What the source says > 59690,IS,,ISO 8643:2017,Earth-moving machinery — Hydraulic excavator and backhoe loader lowering control device — Requirements and tests,Engins de terrassement — Dispositif de contrôle d'abaissement de la flèche des pelles et chargeuses-pelleteuses hydrauliques — Exigences et méthodes d'essai,2017-02-02,3,['53.100'],ISO/TC 127/SC 1,9599,[23691],[87986],"['en','fr']",11,"

ISO 8643:2017 establishes uniform requirements and test procedures for lowering control devices fitted on the boom, intermediate boom and arm cylinders of hydraulic excavators and backhoe loaders to control the rate of drop in the case of a hydraulic line failure or rupture.

It is applicable to the lowering control d ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).