The Liugong CLG990F is a large crawler hydraulic excavator designed for mining, heavy earthmoving, and major construction projects. It emphasizes high power output, structural durability, and operational stability. Equipped with a high-performance engine and advanced hydraulic system, it provides customers with an efficient, reliable, and cost-effective solution for the most demanding jobs.

• Overall length (transport): 13,210 mm
  
• Overall width (transport): 4,410 mm
  
• Overall height (transport): 4,945 mm
  
• Minimum ground clearance: 880 mm
  
• Track length: 6,320 mm
  
• Track shoe width: 650 mm
  
• Total track width: 4,410 mm
  
• Upperstructure width: 3,600 mm
  
• Tail swing radius: 4,400 mm
  

• Max digging height: 12,340 mm
  
• Max dumping height: 8,100 mm
  
• Max digging depth: 7,830 mm
  
• Max vertical digging depth: 5,330 mm
  
• Max digging radius: 11,800 mm
  
• Min swing radius: 5,050 mm
  

• Operating weight: 90,000 kg
  
• Standard bucket capacity: 4.5 m³
  
• Max digging force (arm): 370 kN
  
• Max digging force (bucket): 480 kN
  
• Travel speed: 3.2 / 2.2 km/h
  
• Swing speed: 6.8 rpm
  
• Max drawbar pull: 658 kN
  
• Gradeability: 35°
  

• Engine model: Cummins QSK19
  
• Rated power: 447 kW @ 2000 rpm
  
• Displacement: 19 L
  
• Cylinders: 6 in-line
  
• Max torque: 2508 Nm
  

• Main pump: 2 variable displacement piston pumps
  
• Max flow: 2 × 480 L/min
  
• Main control valve: multi-way valve
  
• Pilot system: load sensing
  
• Travel motors: 2 units
  
• Swing motors: 2 units
  

• Fuel tank: 1,250 L
  
• Hydraulic tank: 550 L
  
• Coolant: 85 L
  
• Engine oil: 75 L
  
• Swing gearbox: 2 × 12 L
  
• Travel gearbox: 2 × 20 L
  

Today, I’d like to open up a discussion about some key differences between the excavator industry in China and in developed countries, especially in Europe and North America. These differences are real and highlight the areas where China’s industry still has room to grow. By recognizing this gap, we can find motivation to keep improving and help China’s excavator sector reach a more advanced level.

When we talk about earthmoving machinery today, images of massive excavators, bulldozers, and mining shovels often come to mind. But few people know that the roots of these powerful machines trace back nearly two centuries — to a remarkable invention known as the steam shovel.

• The power system, which drives all motion;
  
• The undercarriage or traveling system, which moves the machine;
  
• The working implement, which actually digs, pushes, or lifts material.
  

• Their swing range was limited and partly manual.
  
• Steam engines were underpowered, so digging force and bucket capacity were modest.
  
• Frequent coal and water refills were needed.
  
• Workers had to keep laying new tracks to reposition the machine.
  

• Steam engines grew more powerful.
  
• Booms and dipper arms became longer.
  
• Buckets increased in size, and machines became bigger and heavier overall.
  

On March 17, during the peak sales season for excavators in the first half of the year, I purchased a SANY SY330 excavator. After putting it to work, I began to notice several problems.
When I first received the machine, I immediately felt that the operation was not smooth. The movements were sluggish and jerky. At first, I thought the problem was due to the operator being unfamiliar with the new machine, so I didn’t pay much attention to it. However, after a week, the issues persisted. The boom and arm were particularly slow — raising the boom at a horizontal position took more than 10 seconds, and fully extending or retracting the arm took over 6 seconds. Doing leveling work was painfully slow: leveling a 20-meter stretch of road could take half an hour or longer. I called the service technicians, but they couldn’t fix the problem.
By the time the machine had run for 200 hours, the service team had come six times but still hadn’t resolved the issue. The machine’s speed sometimes improved temporarily but would slow down again. Later, SANY’s own technicians came and modified the system from negative flow to positive flow. After testing, the performance seemed much better: the boom took about 6 seconds, the arm about 4 seconds, and the bucket about 3 seconds. We thought the problem was finally solved — the technicians even set off firecrackers to celebrate. But the improvement only lasted for three days before the machine slowed down again, although it was slightly better than before.
Now, with over 600 hours on the machine, the problem still hasn’t been properly resolved. The dealer’s service staff have visited about 20 times and driven almost 8,000 km just for my machine. They even bought a new service vehicle because of these frequent trips. However, nothing has really changed, so I have no choice but to keep using the excavator as is, hoping that the manufacturer or dealer can eventually fix it properly.
Here is a summary of the issues I have encountered with this SANY SY330:

1. Slow and uncoordinated operation, very poor control performance.
   
2. Power cannot be fully shut off: when the key is removed, the power remains on. (This has since been fixed.)
   
3. Bucket teeth cannot be replaced easily: each time, the tooth pins get stuck and have to be cut with an oxy-acetylene torch. So far, I have replaced four sets of teeth and had to torch ten pins, costing about 1,000 RMB each time. All the teeth and pins are genuine parts purchased from SANY.
   
4. The pin connecting the boom and arm has a retaining plate, but this plate once fell off because it wasn’t welded securely. The pin slid halfway out — if I hadn’t noticed in time, the arm could have fallen off completely.
   
5. Doors on the battery box and hydraulic pump box have broken pins; the cabin door latch has also broken.
   
6. When using the heater, there is a burning plastic smell inside the cab, and the cabin is very noisy. Even though the machine is new, it shakes and rattles like an old one.
   
7. The work light is poorly positioned and cannot be adjusted.
   
8. The machine lacks power under load: whenever there is pressure, it belches black smoke, similar to the smoke at startup, and this happens frequently. When starting in the morning, it emits blue smoke for about 10 minutes. The service staff claim this is normal.
   

An Imported Technology
Asphalt transfer vehicles (ATVs) were first developed in the United States in the 1990s. Their proven success in the American market quickly caught the eye of savvy equipment dealers, who began actively promoting them to Chinese customers around the year 2000. However, ATVs have experienced a rather bumpy journey in China.
Early promotional efforts failed to open up the Chinese market. It wasn’t until October 2002 that things began to change. That year, Hebei Road & Bridge Group purchased a ROADTEC SB-2500B asphalt transfer vehicle through Beijing Rongshijie Company and deployed it on the Hangzhou Ring Expressway. This marked China’s first imported asphalt transfer vehicle. The machine attracted widespread attention on site and sparked considerable buzz in the industry.
Around the same time, SANY Heavy Industry launched its own research and development program for asphalt transfer vehicles under China’s national “863” high-tech plan. By September 2002, SANY had unveiled its LHZ25A model at the 6th Highway and Waterway Transportation Expo.
From then on, ATVs became a hot topic in China’s road construction sector.

Quote:“...When conditions allow, delivery trucks may unload asphalt mixes into a transfer vehicle for secondary remixing and continuous, uniform feeding of the paver...”

Quote:“The benefits of ATVs are real, but some manufacturers overhype them—leading to disappointment. This reflects the restless, hype-driven mindset that still plagues parts of China’s construction machinery industry.”

A Century of Development
The scraper, a key piece of earthmoving machinery, has been evolving for over a century. As early as the 18th century, horse-drawn scrapers were used for short-haul soil transport. By 1883, the first fully metal-wheeled scraper was manufactured in the West.
In 1910, the United States built dedicated scrapers towed by tractors, while the Soviet Union began mass-producing wheeled scrapers in the 1920s. By 1938, the world saw its first self-propelled scraper, followed by twin-engine and chain-loader variants in the mid-20th century—culminating in the 1960s with the world’s largest scraper, boasting a 200 m³ bowl capacity.
China entered the scraper field in the 1960s. In April 1961, several institutions—including the predecessors of Yutong Heavy Industries, Tianjin Research Institute, and XGMA—formed a joint design team. Drawing on imported prototypes, they developed China’s first self-propelled scraper. The design was completed that August, and on December 22, 1962, the first prototype (C-6106) rolled off the line in Zhengzhou.
Scrapers: Built for Efficiency
Scrapers are unique in that they combine cutting, loading, and hauling in a single machine. They shine in medium-haul applications—roughly 200 to 1,200 meters—where they outperform the typical excavator–loader–dump truck combination in both speed and cost-effectiveness.
Recognizing this, China invested heavily in scraper research during the 1960s and 1970s. The CL7 model, trialed in 1972, adopted advanced hydro-mechanical transmission and full hydraulic control. It marked a major technical leap, earning a National Science and Technology Award in 1978 and even showcasing China’s progress at the 1975 Cologne International Fair in Germany. In 1978, two CL7 scrapers were used in a groundbreaking test on the Qinghai-Tibet Railway—China’s first industrial field trial for high-altitude road construction equipment.

1. Timeline infographic — showing key scraper milestones: horse-drawn → metal-wheeled → self-propelled → twin-engine → modern large-capacity models.
   
2. Side-by-side comparison diagram — scraper vs. excavator-loader-dump truck combo for the same haul distance.
   
3. Historic photo — early C-6106 prototype at Zhengzhou Plant.
   
4. Modern worksite photo — a scraper in action, ideally a Caterpillar model in the U.S. or at a large open-pit mine.
   
5. Pie chart or bar graph — showing scraper usage percentage in China vs. the U.S.
   
6. Quote highlight box — with Caterpillar’s statement about scrapers’ future in China.
   

I just put in about 10 hours on my brand-new Liugong 913E, and here’s my initial take:

• Operation: Overall, the controls feel smooth, the power is decent but nothing impressive, and the speed is on the slower side.
  
• Modes: I tried out E, P, and F modes, but honestly, the difference between them isn’t very noticeable.
  
• Fuel Consumption: This is the biggest surprise — it’s really fuel-efficient. I fueled up four drums before starting, plus whatever fuel came in the tank, did around 1,000 cubic meters of earthwork (conservatively estimated), and after 10 hours, the fuel gauge still shows half full. Hard to believe!
  
• Compared to the old 915D: When my 915D was new, it never went below 9 liters/hour even on light work. The 913E has noticeably lower power, but for light earthmoving on flat ground, it’s actually a perfect match.
  

In the global mining landscape, Peru — the shining jewel of South America — continues to captivate the world with its abundant mineral resources and booming mining sector. From September 9 to 11, 2026, the highly anticipated Expomina Perú 2026, held biennially, will take place at the Lima International Exhibition Center. As one of the largest mining industry events in Peru, it serves as an exceptional platform for global mining companies to explore the South American market, forge trade partnerships, and exchange cutting-edge technologies.

The Yonggong YGX360LC-8 crawler coal unloading excavator is a large-scale machine designed specifically for coal handling operations. It is known for its efficiency, durability, and reliability. Below is the detailed information :

Overview
The Yonggong YGX360LC-8 crawler coal unloading excavator features an advanced hydraulic system and a powerful engine, ensuring excellent performance in demanding work environments. Its design emphasizes operator comfort and equipment durability, making it ideal for coal transportation and mining operations.
Specifications

• Operating Weight: 33,500 kg
  
• Bucket Capacity: 2.5–3.0 m³
  
• Rated Power: 118 kW / 2,200 rpm
  
• Boom Length: 6,000 mm
  
• Stick Length: 3,500 mm
  
• Swing Speed: 12 rpm
  
• Travel Speed: 0–4.5 km/h
  
• Gradeability: 56%
  
• Maximum Traction Force: 180 kN
  
• Main Relief Pressure: 34 MPa
  
• Maximum Pump Flow: 2×212 + 30 L/min
  
• Hydraulic Tank Capacity: 245 L
  
• Fuel Tank Capacity: 240 L
  
• Transport Length: 10,085 mm
  
• Transport Width: 3,200 mm
  
• Transport Height: 4,200 mm
  
• Maximum Digging Height: 5,815 mm
  
• Maximum Digging Radius: 8,640 mm
  

The Chongqing QN3700 long-arm excavator is a specialized crawler excavator designed for unique working conditions. With its extended boom and stick, it is ideal for tasks such as building demolition, river dredging, and deep trench excavation. Below is the detailed information in English:
Overview
The QN3700 long-arm excavator features a two-section extended boom design, with a boom length of 12 meters and a stick length of 9 meters, totaling 21 meters. This design significantly enhances its digging height, depth, and radius, enabling it to handle tasks that standard excavators cannot. It is suitable for applications such as soil and concrete handling, building demolition, subway excavation, highway slope trimming, and river dredging.
Specifications

• Operating Weight: 37,000 kg
  
• Rated Power: 187 kW / 1,950 rpm
  
• Boom Length: 12 m
  
• Stick Length: 9 m
  
• Total Length: 21 m
  
• Applications: Specialized working conditions
  
• Suitable Scenarios: Building demolition, river dredging, deep trench excavation, etc.