After a certain period of use, agricultural tractors may be deemed unfit for further operation and subject to scrapping if they meet any of the following conditions:
1. Large-scale rail tractor tractors that have exceeded 12 years of service (or accumulated 15,000 operating hours) and, after inspection, adjustment, or replacement of worn parts, still exhibit a technical condition classified as 4.1 or 4.2.
2. Large- and medium-sized wheeled tractors that have exceeded 15 years of service (or accumulated 18,000 operating hours). Even after maintenance, their technical condition remains at 4.1 or 4.2.
3. Small tractors that have been in use for over 10 years (or 12,000 operating hours). After necessary repairs and part replacements, their technical condition is still rated as 4.1 or 4.3.
4. Tractors that have suffered serious damage due to various reasons and are no longer repairable:
- Article 4.1: Fuel consumption increases by more than 20% compared to the factory-specified rate under calibrated conditions.
- Article 4.2: The effective power or power output shaft power of large and medium tractor engines decreases by more than 15% from the factory-specified value.
- Article 4.3: The effective power of small tractor engines drops by more than 15% from the original factory specification.
5. If the cost of major overhaul exceeds 50% of the price of a new tractor of the same type, it may be considered economically unviable to continue using the equipment.
6. Tractors that do not yet meet the retirement age but are in poor technical condition and lack access to spare parts.
7. Tractors that have been officially ordered to be phased out by the government.
These criteria ensure that only those machines that no longer meet safety, efficiency, or economic standards are retired, helping to maintain a safe and sustainable agricultural environment.
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