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In 2024, Wuhan Metro Vehicle Center accomplished a historic milestone in train maintenance, completing overhauls of 88 trains (484 cars) and major repairs of 20 trains (120 cars), fully meeting its annual production targets. Over the past year, the center’s staff across all roles worked in unison, adopting proactive planning and contingency measures to address challenges in regulations, technical protocols, process standards, resource allocation, material supply, timeline management, and quality control.
During the preparation phase, the center developed nearly 800,000 words of overhaul and repair protocols and over 700 process-specific work instructions, aligning with industry standards, maintenance manuals, and real-world operational experience. These guidelines emphasized thorough inspections, repairs, and replacements while avoiding unnecessary work expansion. Annual material procurement plans were formulated in advance to ensure timely and sufficient supply of critical components. To mitigate post-repair inventory issues, the center optimized material orders by analyzing consumption patterns across lines, resulting in near-zero new inventory after overhauls on Lines 11 and 8.
The center implemented a daily production schedule for overhauls and repairs, supported by daily briefings, weekly reviews, and monthly analyses to monitor progress in real time. Managers stationed on-site coordinated issues directly, ensuring strict adherence to timelines. By aligning multi-train repair sequences with subsystem maintenance cycles, the center maximized efficiency in labor, materials, and equipment utilization.
Standardized operations were enforced through strict compliance with technical guidelines, supported by a three-tier inspection system (center, department, and workshop levels). Quality checks and safety risk assessments were conducted at every stage. To enhance technical oversight, the center formulated 92 technical regulations, including the Electric Passenger Train Maintenance Management System, and optimized repair processes and tooling standardization. A digital maintenance management system was fully deployed across all lines, boosting informatization-driven efficiency.
The center established specialized teams to advance self-reliance in core technologies. Notably, it achieved the first in-house overhaul of coupler systems for Line 1 Phase IV trains, reducing reliance on external contractors and strengthening technical capabilities. Pilot projects for centralized repair models were launched at Gutian, Sanjintan, and Yezhihu depots, integrating resources to overcome traditional inefficiencies and improve both speed and quality.
Innovations in tooling design yielded practical solutions such as the "Visual Ultra-High-Pressure Automatic Assembly Device" and "Mobile Coupler Connection Equipment", which won first and third prizes, respectively, at the 2024 Innovation Competition. Six other small-scale inventions, including the "JSP-2 Manual Parking Brake Release Tool", were also recognized.
Building on 2024’s achievements, Wuhan Metro Vehicle Center will continue refining workflows, upholding its commitment to meticulous inspections and repairs, to ensure the safe and stable operation of Wuhan’s urban rail transit network.
