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Standard
ISO 8643
Fourth edition
Earth-moving machinery —
2024-05
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
Reference number
ISO 8643:2024(en) © ISO 2024
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ISO 8643:2024(en)
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Published in Switzerland
© ISO 2024 – All rights reserved
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ISO 8643:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Lowering control device requirements . 2
5 Test method . 4
5.1 Apparatus .4
5.2 Preparation for test .4
5.3 Testing of lowering control device .7
5.3.1 General .7
5.3.2 Testing of internal leakage .9
5.3.3 Testing of holding position .9
5.3.4 Testing during raising .9
5.3.5 Testing during lowering .9
5.3.6 Testing of equalizing lines or signal lines .9
Bibliography .10
© ISO 2024 – All rights reserved
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ISO 8643:2024(en)
Foreword
ISO (the Inter
...