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1. POWER SYSTEM
Engine:
• Brand and model: Engines from well-known brands are usually more reliable and have stable power output. For example, engines from some internationally renowned brands excel in fuel efficiency, durability, and power performance.
• Power: Choose an engine with the right power according to the job requirements. The greater the power, the higher the digging force and operating efficiency may be, but it will also consume more fuel. Generally speaking, large projects may require high-power engines, while small operations can choose models with moderate power.
• Emission standards: Engines that meet higher emission standards are more environmentally friendly and may also mean more advanced technology and better performance.
Hydraulic system:
• Pressure and flow: A powerful hydraulic system can provide enough pressure and flow for efficient digging and operation. You can feel the performance of the hydraulic system by looking at the technical parameters of the machine or actually operating it. For example, when digging hard soil or performing heavy load operations, the hydraulic system should be able to respond quickly and provide enough power.
• Stability: A good hydraulic system should remain stable during operation without problems such as pressure fluctuations or leaks. You can observe the performance of the machine during long-term operation, and check whether there are leaks in the hydraulic lines and joints.
2.OPERATIONAL PERFORMANCE
Cab:
• Comfort: A comfortable cab can improve the operator's work efficiency and comfort. Pay attention to the seat adjustment function, air conditioning effect, noise level and other aspects. For example, an adjustable seat can adapt to operators of different body shapes, and a good air conditioning system can maintain a comfortable working environment in hot or cold weather.
• Field of view: A good field of view is essential for safe operation. The cab should provide a wide field of view and reduce blind spots. The field of view can be evaluated by actually sitting in the cab and observing the surrounding environment.
Maneuverability:
• Handle and pedal sensitivity: The operating handle and pedal should be sensitive and accurate, and can easily control the movement of the excavator. During the test drive, you can feel the force feedback of the handle and pedal and the accuracy of the operation.
• Automation function: Some high-end excavators may be equipped with automation functions, such as automatic leveling, automatic excavation, etc. These functions can improve work efficiency and accuracy, but they also require operators to be familiar with and master their use.
3. STRUCTURE AND DURABILITY
Chassis and Tracks:
• Strength and Stability: A strong chassis and tracks can withstand the weight of the excavator and the impact during operation. Check the material, thickness, and welding quality of the chassis and tracks. For example, chassis and tracks made of high-strength steel are more durable.
• Track Width and Length: Choose the appropriate track width and length according to the conditions of the work site. Wider tracks can provide better stability, while longer tracks are suitable for soft ground or when obstacles need to be crossed.
Working Devices:
• Boom, arm, and bucket: These parts should have sufficient strength and wear resistance to withstand the pressure of excavation and loading operations. Check the material, welding quality, and reinforcement structure of the key parts of the working device. For example, buckets made of high-strength steel are more durable and can be equipped with wear-resistant plates to extend their service life.
• Connections: The connection parts of the working device should be firm and reliable, without problems such as loosening or breaking. Check the wear and tightness of the connecting parts such as the pin shaft and the pin sleeve.
4. REPAIR AND MAINTENANCE
Easy to maintain:
• Reasonable layout: The various parts of the excavator should be reasonably laid out for easy repair and maintenance. For example, the engine compartment should be easy to open, and the filters and valves of the hydraulic system should be easy to replace.
• Repair space: Provide sufficient repair space so that the operator can easily perform repair and maintenance work. For example, when replacing the track plate or performing engine repairs, there needs to be enough space for operation.
After-sales service:
• Brand and dealer: Choose an excavator of a well-known brand and ensure that there is a reliable dealer to provide after-sales service. Understand the dealer's service network, maintenance technology level, and spare parts supply.
• Warranty policy: Pay attention to the warranty policy of the excavator, including warranty period, warranty coverage, etc. A longer warranty period and comprehensive warranty coverage can provide users with more protection.
5. PRICE AND COST-EFFECTIVENESS
Price:
• Market price: Understand the market price of excavators of different brands and models for comparison. The price is usually related to factors such as the performance, configuration and brand of the machine.
• Cost-effectiveness: Consider the performance, price and after-sales service of the machine, and choose an excavator with high cost-effectiveness. Don't just pursue low prices and ignore the quality and performance of the machine.
Second-hand market value:
• Retention rate: Consider the second-hand market value of the excavator and choose brands and models with higher retention rates. Machines with high retention rates can get higher returns when they are sold in the future.
In short, judging the performance of an excavator requires comprehensive consideration of multiple aspects, including power system, operating performance, structure and durability, repair and maintenance, as well as price and cost-effectiveness. When purchasing an excavator, it is recommended to conduct sufficient market research and test drive to choose a machine that suits your needs.