The winter maintenance of construction machinery is of great significance. Especially in the northern regions where winters are long and the temperature remains low for extended periods. When construction machinery is used in winter, the cold climate can easily lead to difficulties in starting internal combustion engines, freezing of cooling water and electrolyte, intensified wear […]

The reasons for the downward deflection of the main girder of overhead cranes are multifaceted and should be analyzed according to specific circumstances. Generally speaking, issues can arise from design, manufacturing, transportation, installation, and use. (1) The Impact of Unreasonable DesignIn the past, China followed the Soviet standards. The static stiffness of the main girder […]

Regardless of the type of machinery, different lubricating oils are prohibited from being mixed for use, and reducers are no exception. For reducers, the positions of the oil level plug, drain plug, and breather are determined by their installation locations. When it comes to the use, inspection, and maintenance of the lubricating oil in reducers, […]

(1) Requirements for Elastic Base Plates The elastic base plates are made of rubber sheets, and their properties should meet the following requirements: a Shore hardness of 70 – 80 degrees, a tensile strength greater than 130 kg/cm², an elongation at break greater than 300%, and a compressive elastic modulus of 700 – 1200 kg/cm². […]

The installation of crane tracks is a crucial process that ensures the proper alignment and operation of overhead cranes. The following detailed steps outline the installation procedure: 1. Line Marking Using the crane girder’s positioning axis as a reference, deploy a theodolite to establish baseline points. At a distance of 60mm from the track centerline, […]

Introduction Grounding is an essential aspect of crane safety, ensuring the protection of both personnel and equipment from electrical hazards. Proper grounding mitigates the risks of electric shock, fire, and equipment damage by providing a reliable path for electrical currents to flow safely into the earth. This guide provides a comprehensive overview of grounding requirements […]

I. Unified Signals for Operators and Signal Personnel Gantry crane operators and signal personnel must use standardized and unified signals to ensure effective communication and coordination. Operators should ascend or descend the control cabin using designated ladders. Before engaging the power supply, the controller must be turned to the neutral position. The cabin floor should […]

Proper lubrication and maintenance of the crane’s walking mechanism are critical for ensuring the equipment’s longevity, reliability, and safe operation. This document provides comprehensive guidance on the lubrication and care of the crane’s walking components, including the reduction gears, wheel bearings, and open gear systems. Initial Setup and Reduction Gear Lubrication When the walking mechanism […]

I. Importance of Moment Limiters in Crane Safety Lifting equipment is a type of machinery with relatively high risks at construction sites. Once an accident occurs, it often leads to severe consequences with multiple casualties. Therefore, the safety issues of lifting equipment have always been emphasized by relevant departments. The moment limiter is one of […]

I. Introduction to Zero-Position Self-Locking Devices In the operation of cranes and other similar equipment, there is a need to prevent any inadvertent movements of the control console due to vibrations and accidental collisions. To address this concern, zero-position self-locking devices are installed on the operating handles. These devices play a crucial role in ensuring […]