First, the new machine is not in place
Many operators do not have and do not understand the concept and significance of run-in, that run-in is not only a waste of time and waste of fuel, it is not cost-effective. Some do not run in directly on the use of large throttle high speed, hate a day to recover all the investment; Some do not understand the concept of running in, think that after going home, let it idling for 2~3 hours is OK. In fact, run-in is a total gradual process, must start from a small throttle low speed, low gear, low load, gradually increase to high speed, high position, large load. Its purpose is to gradually grind off the uneven parts of the surface by slowly increasing the load under good technical conditions and lubrication conditions, so as to lay a good foundation for the normal use and prolonging the life of the machine. Therefore, the machine hand must be strictly in accordance with the requirements of the manual necessary run-in. Crow magpie ridge town baihe village a villager new this year bought a Mini tillage machine, home the next day began to help others to plow, only a month income 3000 yuan, but, because did not do well in, a month after the machine started to emit blue smoke, cylinder liner, piston, piston ring have been serious wear and tear, spend and spend time as a result, do more harm than good.
Two, the maintenance is not in place
Due to the poor working environment of Mini-tillage machine, maintenance is particularly important. Mini tillage machine in the work, due to the friction between parts and vibration, oil, mud, water invasion, inevitable to cause the wear and tear of parts; Loose connection, corrosion aging. As a result, the technical state of Mini tillage machine deteriorates, the power decreases, the fuel consumption increases, the wear speeds up, and the failure constantly appears. In order to prevent the occurrence of the above situation, we must strictly implement the maintenance system of prevention over treatment and maintenance over repair. Maintenance must be carried out in strict accordance with the cycle and content of maintenance. Liu Yongzhong of Jinzhu Village, a sub-township, reported that his machine was weak, burning oil and difficult to start. He took it open and checked: the oil in the engine gearbox had become muddy and difficult to lubricate; Engine radiator vents are all blocked, the heat dissipation effect is poor; Cylinder liner, piston severely worn, underpowered. Typical failure caused by inadequate maintenance.
In the process of investigation and maintenance of Mini-tillage machine, some wrong maintenance methods were also found, mainly including the following:
1, air cooler water cooling. Some operators see the air cooler temperature is high, worried about damage to the machine, with the method of watering to help cool down. In fact, it is very wrong to use water to cool down suddenly, and the cylinder liner suddenly shrinks. It is easy to pull the cylinder, break the ring, and even break the cylinder liner.
2, do not pay attention to class maintenance. Some machines think that a few days to do a maintenance on the line, in fact, wear is the process of accumulation over time, class maintenance as main.
3, do not pay attention to the quality of fuel and lubricating oil. Poor fuel quality, not only make the machine power is not enough, but also accelerate the wear of oil pump and sleeve; The quality of lubricating oil directly affects the starting performance and service life of the machine, and must not be careless. A villager in Shahe Village, Yaowan Township, Yichang City reported that his machine had been in good use, but because of a lack of lubricating oil in one operation, he added a recycled oil, resulting in a comprehensive decline in machine performance, and finally the problem was solved after an overhaul.
4. Improper use of sealant for engine offset cover pad. After the use of sealant, the excess glue is easy to enter the gear box, because of the long time of work and the suction of the oil pump, the sealant is easy to plug the oil inlet hole, so that the crankshaft and connecting rod can not be effectively lubricated.
5, fuel tank cover oil leakage with film paper seal. After sealing the tank, long-term work will generate negative pressure in the tank, resulting in insufficient oil intake, so that the machine will emit black smoke when working, and lack of power.
6. Tighten the screws on the body. Mini tiller is equipped with aluminum alloy box engine, aluminum alloy hardness is obviously less than nodular cast iron, so all the screws on the body must be forced according to the twisting distance, especially the cylinder head screw, a little attention will be drawn. And try not to tighten the screws on the engine.
7. Disassemble the air hood and windscreen of the air cooler. Some hands do not know the role of the air hood and windscreen, think it is a soil retaining thing, can be or not, arbitrary disassembly, so that the wind of the fan can not be concentrated, lost the cooling effect.
Three, the operation method is not correct
The operation method is wrong, it is easy to cause some faults. It can be summarized as follows:
1, long time overload operation. Mini tillage machine in paddy field and hard field operation, found that the machine smoke, it is necessary to timely reduce the file.
2, find abnormal sound to stop maintenance in time. Drum troubleshooting before restarting.
3. Various gaps should be adjusted frequently.
4, the start method is not correct, easy to damage the start pull disk. Start in strict accordance with the instructions.
5, do not lift the handrail when turning, use the power plowing knife to turn, easy to break the power plowing knife.
6, long time warping work, easy to make the engine lubrication poor.
