Agricultural tractors have three types of walking tractors, wheeled tractors and crawler tractors. The walking tractor is mainly suitable for farmland operations and short-distance transportation operations in small plots, and is generally used in southern rural areas. Wheeled tractors are divided into belt-driven small four-wheel tractors and direct-drive tractors. They are mainly used in rural areas in northern China, and large wheeled tractors are suitable for use in large-scale farmland production. Caterpillar tractors can be equipped with bulldozers and are used in many fields such as farmland infrastructure construction and water conservancy projects. The following is a general introduction to the common sense of how to buy a small four-wheel tractor that is most used by farmers. First, the overall form of the choice of the small belt tractor is usually called a small four-wheel tractor, in recent years, the small four-wheel tractor is mainly 15 horsepower (11.03KW) and 18 horsepower (13.2KW). The 20-horsepower and 12-horsepower small four-wheel tractors are less on the market. There are two types of diesel engines installed on small four-wheel tractors. One is an evaporative water-cooled diesel engine, and the other is a circulating water-cooled diesel engine. Because these two types of diesel engines have different structures and parts cannot be interchanged, you should select the type of diesel engine that is commonly used in your area when you purchase a tractor. This is very important for future repairs and maintenance. Second, how to choose specific Selection of brand-name products Because the brand-name products are recognized by the public in long-term use, or approved by authoritative departments (such as agricultural machinery promotion license products of the Ministry of Agriculture), their product quality is reliable, performance is advanced, product coverage is large, and after-sales service is good. 2. Check the appearance of a shell paint should be bright, should be uniform, can not have peeling, shedding, hand sensitization smooth. 2 casting surface should be smooth, no cracks, no cracks, the appearance of sheet metal parts should be smooth, the surface of the plating parts should be bright and no rust. 3 The surface of the tire should be smooth, regular pattern, no bubbling, cracks. 3. Check the safety protection device, and whether the safety warning sign is complete. 1. Check the starting shaft of the engine. The end of the shaft head cannot exceed the plane of the engine housing. 2 Pulleys and belts must have protective covers. 3 The exhaust pipe should have a protective cover. 4 Stairs and foot pedals on the car should have anti-slip flanges or ribs. 5 PTO shaft head must have a shroud. 6 In the operating device where the direction of operation is not obvious, there shall be a sign indicating the direction. 4. Check the operating mechanism 1 throttle and tie rod connection is reliable, try to step no card touch. 2 Push and pull the main and auxiliary gear levers according to the operating rules to confirm their reliability. 3 The steering wheel should be less than 30 degrees when the front wheel is not moving. 5. Commissioning 1 Check engine oil level, add fuel and cooling water. 2 When the outdoor temperature is 5 degrees Celsius or more, three consecutive starts, of which there should be two successful start within 30 seconds. 3 Run for 10 minutes under moderate throttle. The sound of smoke and engine should be continuous and steady. After 410 minutes, reduce the throttle as much as possible, operate at a low speed (idle speed), and the sound of the engine should be steady. 5 gradually increase the throttle, the engine sound should also be stable, the maximum throttle, not black smoke. 6. Stop for leaks and leaks. Check that there is no dripping or flow mark on the joint surface of rotating parts. Hand and static joint surface should be no moist. 7. Checking and verifying the certificate of random attachments, certificates and document products; the promotion permit for agricultural machinery; the "three guarantees" certificate (service card); instruction manuals and maintenance manuals; Third, after-sales service inspection According to the state's "Three Guarantees," the provisions of the following provisions of the user should pay special attention to 1. Any unit is not allowed to sell products that do not meet the legal marks and products and fake and shoddy products. 2. When buying a product (a tractor), the sales organization shall hand over the inspection to the farmer and check the tools, accessories and spare parts of the vehicle according to the packing list. Allow farmers to inspect the quality of the product's appearance and test the vehicle, and at the same time, introduce product use, maintenance, and maintenance knowledge. 3. Take the initiative to provide farmers with invoices printed by the fiscal and taxation departments. 4. Introduce the "Three Guarantees" method, maintenance address and contact methods to farmers. 5. The repairer shall undertake the free repairs and related charges repairing business within the “Three Guarantees†validity period. 6. The "Three Guarantees" period for small tractors and diesel engines is 9 months, and the main parts are 1.5 years.
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