GB/T 21938-2008
AbolishedEarth-moving machinery - Hydraulic excavator and backhoe loader boom-lowering control device - Requirements and tests
土方机械 液压挖掘机和挖掘装载机动臂下降控制装置 要求和试验
Application Summary AI generated
This standard specifies the performance requirements and test methods for boom-lowering control devices on hydraulic excavators and backhoe loaders. It is applied in the design, manufacturing, and safety verification of earth-moving machinery to ensure controlled descent of the boom in the event of a hydraulic failure. The standard is used by manufacturers and testing bodies to validate compliance with safety regulations in construction and mining operations.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.