Improvements in Hydraulic Control Systems of Lifting Mechanisms for Construction Machinery

Peer-reviewed article deposited for open archiving and discovery (librarian deposit; author: Taras Veherinskyi). Original publication: Veherinskyi T.I. (2025). Improvements in Hydraulic Control Systems of Lifting Mechanisms for Construction Machinery. Universal Library of Engineering Technology (ULETE), Vol. 2, Issue 3 (2025), pp. 114-118. Published 05 August 2025. DOI: https://doi.org/10.70315/uloap.ulete.2025.0203021 Article PDF: https://ulopenaccess.com/papers/ULETE_V02I03/ULETE20250203_021.pdf Issue archive: https://ulopenaccess.com/ulpages/archivearticlesUlete?IssueID=ULETE_V02I03 Abstract: This paper investigates an integrative approach to optimizing the performance and extending the service life of hydraulic systems in construction machinery. The relevance of the study is determined by the high energy intensity and accelerated wear of hydraulic drive components, which lead to increased operating costs and prolonged equipment downtime. The objective of the study is to propose and verify a comprehensive methodology that combines control system modernization with the implementation of advanced technologies for the restoration of worn components. The methodological basis is a systematic review of current scientific publications in the fields of hydraulics and materials science. The results include metrics demonstrating increased productivity achieved through the use of proportional hydraulic systems on the example of the CAT-320D excavator, as well as the economic and technological superiority of innovative methods for restoring the surfaces of hydraulic cylinders and hinge assemblies. It is shown that the combination of technical modernization and high-precision restoration procedures not only expands the functional capabilities of the equipment, but also reduces operating costs and shortens downtime from several months to several days. The practical and theoretical significance of the study is evident for design and field engineers, service department managers, and specialists in the operation and repair of construction and road machinery.HAL open archive record: https://hal.science/hal-05855800 (hal-05855800)