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About This Item
Full Description
This International Standard establishes uniform requirements and test procedures for boom-lowering control devices fitted on boom-lift cylinders to control the rate of drop in the case of a hydraulic line failure or rupture.
This International Standard applies to boom-lowering control devices on hydraulic excavators and the backhoe part of backhoe loaders, when used for handling and lifting objects.
Document History
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ISO 8643:2024
Earth-moving machinery - Hydraulic excavator and backhoe loader lowering control device - Requirements and tests- Most Recent
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ISO 8643:2017
Earth-moving machinery - Hydraulic excavator and backhoe loader lowering control device - Requirements and tests- Historical Version
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ISO 8643:1997
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Earth-moving machinery - Hydraulic excavator and backhoe loader boom-lowering control device - Requirements and tests- Historical Version