en.Wedoany.com Reported - China's Zoomlion has developed a 21-ton crawler hydraulic excavator for the Middle East market, designed for high-temperature conditions and high hydraulic breaker operation ratios, primarily serving municipal construction, public utilities, and mining operations. Local temperatures can exceed 50 degrees Celsius, with hydraulic breaker operation accounting for over 70% of working time.
Wu, head of Zoomlion's product R&D team, stated that Middle Eastern customers need not just an excavator, but equipment capable of continuous operation. The local environmental conditions differ significantly from traditional earthmoving operations, requiring machines to be developed based on actual worksite conditions. Wu led the entire process from design and testing to optimization and mass production.
The core challenge faced by the R&D team was controlling heat during prolonged breaker operations. Continuous breaking operations combined with extreme temperatures place high demands on the cooling system.
The team redesigned the airflow path and optimized the cooling core to improve heat dissipation. Engineers reinforced key structural components and improved welding processes to reduce stress under repeated impacts. To enhance dust resistance, the team optimized the intake system and cab sealing.
All improvements were tested at Middle Eastern customer worksites, where the team used sensors to collect data and completed thousands of impact cycles to refine the design. The project brought together product development, testing, manufacturing, technical support, and international operations teams, with Zoomlion's headquarters testing center providing three months of support for high-frequency breaker durability testing.
The development process required continuous testing and adjustments. When the initial cooling design needed further refinement, the team used data to optimize the system and continued moving forward. Wu noted that innovation always comes with lessons, and the company's support gave the team confidence to tackle complex engineering challenges.
For Wu and his team, the award is recognition of years of customer-centric engineering work. Wu emphasized that it is an honor but not the ultimate goal, and the team will continue to learn on worksites to manufacture equipment that customers can rely on.
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