As a maintenance engineer, daily maintenance of excavators is not only a fundamental task for extending equipment life but also a core aspect of improving on-site work efficiency, reducing failure rates, and lowering maintenance costs. Excavators operate for extended periods in environments such as earthmoving, mining, and construction sites, making them susceptible to corrosion from dirt, dust, and oil. Insufficient lubrication or hydraulic system problems can often lead to serious malfunctions. Therefore, the three tasks of "cleaning, lubrication, and hydraulic inspection" must be strictly performed, combined with meticulous maintenance tailored to the actual operating environment.

Winter in cold regions presents rigorous challenges to various systems of commercial vehicles. Low temperatures can make materials brittle, slow down electrochemical reactions, and thicken lubricants, directly affecting vehicle starting performance, driving stability, and overall reliability. In cold regions, especially during winter, it is essential to plan ahead and strictly implement winter maintenance strategies for commercial vehicles to ensure safe and efficient operation. This article focuses on the technical details of battery management and fuel system anti-freezing measures.

Commercial cargo vehicles are an important component of the modern transportation industry, widely used for transporting goods across various sectors. However, overloading frequently occurs during transportation, especially when transportation demand is high and time is limited, leading drivers or transportation companies to disregard load limits. Overloading of commercial cargo vehicles is not simply a matter of "carrying more goods," but a fundamental breach of the vehicle's design load limits. This article will analyze in detail the risks and consequences of overloading commercial cargo vehicles from the perspective of safe driving, helping industry personnel better understand and prevent overloading risks and ensure transportation safety.

Sanitation vehicles, as essential tools for urban environmental cleaning, operate year-round in harsh working environments, especially in areas with heavy dust, pollution, and humidity. Therefore, timely and effective maintenance and repair are crucial for extending the service life of sanitation vehicles, improving work efficiency, and ensuring operational safety. This article, from the perspective of a sanitation vehicle maintenance engineer, will detail the maintenance and repair precautions for sanitation vehicles after prolonged operation, helping to improve their operational efficiency and safety.

Sanitation vehicles, as the "cleaners" of the urban public environment, undertake important tasks such as sweeping and waste transportation. To ensure their efficiency and safety, pre- and post-operation inspections are crucial. Facing a high-intensity, high-load working environment, the reliability of the vehicle directly affects operational safety and efficiency. As a sanitation vehicle maintenance engineer, we need to understand the inspection requirements for each stage to ensure the normal operation of sanitation vehicles and extend their service life. The following are the inspection items required before and after operation.

Heavy-duty engineering vehicles are widely used in harsh engineering environments such as mining areas, construction sites, and transportation, carrying out important production tasks. These vehicles typically operate under high load and high intensity conditions, therefore, regular maintenance and repair are crucial to ensure the reliability and service life of heavy-duty engineering machinery after high-intensity, high-load operation. This article, from the perspective of heavy-duty vehicle maintenance engineers, will detail the maintenance and repair steps for these vehicles after transportation, combining the Chinese Engineering Machinery Industry Association standard (GB/T 37143-2018) and frontline practical experience, to extract actionable maintenance points to ensure their long-term efficient and safe operation.

Heavy-duty vehicles (such as mining dump trucks, engineering transport vehicles, and large excavators) operate for extended periods in harsh environments such as mining areas, deserts, and mountainous regions. They frequently face high-intensity working conditions and extreme natural environments, encountering complex erosion from high concentrations of dust, high-temperature sandstorms, mud and salt spray, and strong vibrations. These environments pose serious challenges to the dust and corrosion protection capabilities of these vehicles. This article will analyze and introduce, from the perspective of professional maintenance engineers, how to ensure the normal operation of heavy-duty vehicles in these harsh environments through scientific design and effective maintenance.

Heavy-duty towing tasks pose rigorous challenges to all system components of a tractor truck: high torque output, increased thermal load, frequent braking system operation, greater load on tires and suspension systems, and accumulated wear on the towing connection points. The core of professional maintenance is to eliminate potential problems, restore performance, and extend vehicle life through systematic inspection and targeted maintenance after each heavy-duty towing task.

Tractor-trailer combinations are one of the most common heavy-duty equipment used in road transport. When the load is significant, the stability, braking performance, and handling of the entire tractor-trailer combination change significantly. To ensure the safety of heavy-duty towing and improve operational standards, this guide, based on the specifications of the Chinese Ministry of Transport, mainstream manufacturer technical manuals, and real-world accident cases, selects key operational points and describes the basic towing and coupling techniques for tractors and trailers. It is applicable to frontline tractor drivers and fleet managers.

Since passenger and commercial vehicles typically undertake long-distance transportation tasks and require efficient and safe operation, regular maintenance and care are particularly important. Maintenance and care should follow the principles of "prevention first, periodic maintenance, repair as needed, and full record keeping," with the road transport operator bearing the primary responsibility. The following are comprehensive inspection and maintenance steps that should be performed on passenger and commercial vehicles after use to help maintain optimal vehicle performance and reduce malfunctions.