Earth-moving machinery; hydraulic excavator and backhoe loader boom lowering control device; requirements and tests

This document establishes specific requirements and corresponding test procedures for the boom lowering control systems utilized in hydraulic excavators and backhoe loaders. It addresses critical safety and functional criteria designed to ensure reliable operation of the boom control mechanisms across various machine models. The guidelines cover aspects such as response characteristics, stability during descent, and the prevention of unintended movements under normal operating conditions. By defining clear performance parameters, the standard provides a consistent framework for manufacturers to evaluate and verify the control system's behavior. The test methodology included within this specification allows for the systematic assessment of the equipment's ability to manage the boom's movement with precision. Adherence to these guidelines supports the development of machinery that meets established safety benchmarks. The content focuses strictly on the technical specifications and evaluation methods necessary for ensuring the integrity of the hydraulic control architecture in earth-moving equipment.