A quiet revolution is sweeping through China’s—and the world’s—construction machinery industry: the shift to new energy equipment. Once limited to concept models, electrification has now entered full-scale industrial competition. Zoomlion recently rolled out its 5,000th battery pack, XCMG has built a vast portfolio of green products, and LiuGong’s electric wheel loader sales overseas have more than doubled. As leading manufacturers unveil their “electric cards,” the era of green construction machinery has fully arrived.     Beyond “Swapping a Battery”: The Core of Technological Transformation   Battery — The “Super Heart” of Machinery Safety and performance come first. A construction machine’s battery pack must withstand extreme conditions with robust structural strength and advanced thermal management to prevent impact, puncture, or overheating risks. Zoomlion’s milestone 5,000th in-house-developed battery pack reflects not only production capacity but also technological reliability. Delivering high power density under demanding workloads is the key challenge driving innovation in this field.   E-Drive — The Intelligent Muscles of Power Electric motors have replaced traditional diesel engines and hydraulic systems as the primary source of motion. Precision control is essential: for example, when an excavator bucket meets resistance, the system must instantly adjust torque output to avoid damage while maintaining efficiency—an outcome achieved through sophisticated motor control algorithms.   E-Control — The Brain Behind the Power An intelligent electronic control system acts as the “brain” of an electric machine. Like a seasoned operator, it automatically matches the optimal power mode for each condition. XCMG’s self-developed XES Energy Management System intelligently distributes power—similar to a smartphone’s energy-saving mode—maximizing operating efficiency and extending battery life.     Industry Titans Leading the Charge   Zoomlion: A Milestone in Core Component Independence On October 17, 2025, Zoomlion celebrated the rollout of its 5,000th power battery pack in Changsha—a symbol of its fully independent, vertically integrated production chain from core component R&D to green jobsite applications. The pack, featuring a proprietary battery management system, delivers 20% longer cycle life than similar models and remains stable from –40°C to 60°C. Zoomlion also unveiled a full suite of lithium, electric drive, and hydrogen power solutions, demonstrating its all-stack innovation and multi-scenario adaptability.   XCMG: Building a Comprehensive Green Product Matrix Under the theme “Green Power, Smart Future,” XCMG showcased 35 new energy machines and key components at BICES 2025, spanning road, mining, and construction sectors. The company introduced five tailored green solutions for different working conditions. In Inner Mongolia’s Yimin coal mine, for instance, XCMG’s fully electric GR350EP motor grader has entered real-world operation—delivering zero emissions and low energy consumption. Through the dual drivers of electrification and automation, XCMG is evolving from an equipment manufacturer to an integrated solution provider.   LiuGong: Expanding Its Global Electric Footprint LiuGong has taken a pioneering role in the global electrification race. In the first half of 2025, sales of its electric wheel loaders surged 193% year-over-year, representing more than 50% of total electric loader exports from China. Its autonomous electric wheel loaders have also secured over 20 intention orders, pushing commercialization forward. This robust performance has driven LiuGong’s overseas revenue to 8.523 billion yuan—nearly half of its total income.     Real-World Adoption: Where Electrification Leads   Ports and Mines — Economically Driven Transformation Ports and large mines are ideal for electric equipment due to their fixed routes and high-intensity workloads. These sites can easily establish centralized charging infrastructure, maximizing cost savings. LiuGong’s strong overseas sales highlight the financial advantages for energy-intensive operations.   Urban Construction and Special Projects — Regulatory Necessity Urban renewal, subway tunneling, and indoor construction require low-noise, zero-emission operations. Electric excavators and forklifts are often the only viable choice, allowing contractors to work at night without disturbing residents while meeting strict environmental regulations.   Emergency Rescue — Silent but Powerful During earthquakes, fires, or other rescue operations, power outages are common. Electric equipment—powered by large-capacity onboard batteries or mobile chargers—can operate quietly, minimizing noise interference with life detection equipment and gaining precious time during the critical “golden 72 hours.”     Challenges and the Road Ahead   High initial cost: Electric equipment remains more expensive than diesel models, posing barriers for small contractors and rental firms. Limited charging infrastructure: Complex jobsite conditions make fast, stable charging difficult, leading to downtime concerns. Battery recycling: The industry must prepare for large-scale end-of-life battery management in the coming years.   Despite these challenges, the trend is irreversible. As technology advances, production scales up, and green construction policies strengthen, the “tipping point” for electric construction machinery is rapidly approaching. Future job sites will be populated by efficient, clean, and quiet “Green Giants.”     From roaring “fuel beasts” to silent “green titans,” this energy revolution represents more than a power shift—it’s a complete transformation of products, business models, construction methods, and industry ecosystems. Behind it lies the determination of China’s machinery giants not just to follow global trends but to lead the new energy era.   So next time you pass by a quiet construction site, take a closer look—the silent machines at work are shaping the future of Chinese smart manufacturing.

When an excavator engine runs at high temperature, the belt tension is often inspected first. Incorrect tension affects cooling performance and may lead to overheating. Here are the standard methods for checking and adjusting belt tension.   Belt Tension Inspection Methods   Visual and Manual Belt Check Excavator engines are equipped with alternator belts, fan belts, and air-conditioning belts. Inspect each belt for wear and ensure proper tension for stable performance. When pressing the midpoint of the belt with your thumb, insufficient tension will cause belt slippage, while excessive tension may damage bearings.   Using a Spring Scale Pull the belt with a spring scale and measure the deflection using a ruler. With repeated checks, operators become familiar with the correct tension by feel.   Manual Deflection Check (Approx. 6 kg Force) Apply about 6 kg of force at the midpoint between two pulleys and measure the belt deflection. The value should fall within the manufacturer’s recommended range.   Belt Tension Adjustment Methods   Adjusting Through the Manual Hydraulic Pump Set the manual valve of the hydraulic pump to the tensioning position. Loosen the necessary bolts and adjust until proper balance is achieved.   Ensuring Even Load During Tensioning Rotate the pulley during the tensioning process to distribute the load evenly on the belt. Once pressure is balanced, tighten the bolts onto the motor base, secure the base, and return the manual valve to the neutral position to release pressure.   Adjusting by Changing Center Distance Move the adjustable pulley to modify the center distance between pulleys, increasing or reducing belt tension as needed.   Belt Replacement Procedure When replacing a belt, move the adjustable pulley fully inward to minimize the center distance. This creates enough slack to remove and install the belt.