With the increasing social possession of agricultural machinery, the correct use and maintenance of agricultural machinery and equipment, and maintaining good technical conditions, making agricultural machinery better serve agricultural production and promote agricultural production and income increase are urgent problems to be solved. .
First, the running of the tractor.
Before a new or repaired tractor is used for formal use, it must be run at a specified speed, load, and time. Some are also called tractors. During this period, it mainly focused on a comprehensive inspection of the technical status of the tractors' departments. Through the transition of the tractor from idle operation to a certain load, the working surfaces of the moving parts are polished smooth and smooth, forming a working surface that can withstand heavy loads, so as to meet the requirements for normal operation under various load conditions.
Why do new tractors or repaired tractors have to run in before they are used officially? Because new or repaired tractors, all or part of their parts are new, no matter how delicate new parts are processed: The machined surface will always have different degrees of tool marks. The actual contact area of ​​the part is smaller than the calculated contact area. Therefore, the pressure per unit area is relatively increased, and when the unrunning working surface is running, . Due to the existence of a knife i mark, it is easy to squeeze out the lubricating oil, so that the friction surface is poorly lubricated. Therefore, the running operation before use can make the tool marks on the surface of the part gradually flatten to meet the design requirements of pressure. The correct clearance between the area and mating parts, and keep the lubrication well. If the running is not carried out according to the specified requirements, the heavy load operation will cause sharp wear of the parts and reduce the service life of the tractor.
What problems should be paid attention to when running a tractor?
In the running-in process of tractors, we must first solve the ideological and cognitive problems concerning leading cadres and users. Some farmers' operatives are eager to engage in the production of new tractors, and think that the operation of the tractor is “burning oil, not working, grinding and grinding.†It is not necessary." Some crew members also think that it is not necessary to engage in such a long running operation. Secondly, experienced drivers with strong sense of responsibility must be organized to work on the running-in of tractors in order to earnestly carry out grinding operations in accordance with the requirements, and to promptly detect and deal with the problems arising during running-in to avoid accidents.
In general, the running time of the tractor is 50-60 hours. In addition to strictly following the requirements in the implementation, from the low speed to the high speed, and from the no-load to the heavy load, in order to make full use of the tractor, it can be used when the load is running in. With the permission of the regulations, combined with production. Generally, different machines can be used to perform different operations according to the needs of the tractor's running-in load.
Several types of tractor running time are allocated as follows;
Several problems that the tractor should pay attention to during the running-in operation;
1, according to maintenance regulations on time and technical maintenance.
2. When the engine is running in, it usually runs at low speed, medium speed and high speed for several minutes. It is found that abnormal sound and abnormal phenomena (severe smoke, oil leakage, instrument abnormality, etc.) should be immediately stopped to eliminate the malfunction:
3. The running-in of the hydraulic system can be performed during the idling running-in period of the tractor and before the running-in of the load. Generally, the joystick should be placed in different working positions, and the suspension mechanism should be able to be lifted smoothly and rapidly without dropping, and the hydraulic system is separated. When "up" and "pressure drop" position, it should be able to automatically jump back to the neutral position, "floating" position can not be moved back to white. And continue to lift 20 --- 30 times, no abnormal phenomenon will end. After the hydraulic system runs-in, it is necessary to pay attention to the off-board handle of the hydraulic oil pump in the disengaged position, so that the oil pump stops working, so as to avoid the hydraulic oil pump working frequently during the running-in process of the tractor and accelerating the wear of the parts of the hydraulic oil pump.
4. After the tractor is idling, replace the engine oil sump oil, and clean the oil and diesel filter.
5, after the tractor load running is completed, you must thoroughly clean the oil pan, gearbox, replace the various parts of the lubricating oil. In order to avoid the lubricating oil with a large amount of metal shavings to continue to work, causing heavy wear and tear on the parts. And comprehensive inspection of the valve train, crank linkage mechanism B clutch, gearbox, rear axle and walking system. Adjust valve clearance, tighten cylinder head nuts, check for wear of connecting rod bush and main bearing bushes, tighten bolts and nuts, and perform clutch free stroke, working idle, engagement marks and backlash of central turning device, joystick, Check brake pedal stroke adjustment. Special attention should be paid to checking the engine fulcrum, the front fulcrum of the transmission, the steering clutch passive drum and the receiving plate, the gantry platform, and the driving wheels, etc., for tightening the bolts and nuts of the various parts. (The inspection of these items should preferably be carried out earlier.)
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