Tractors used on the four erroneous practice

1, with the throttle control engine speed . Some of the largest tractor driver put the throttle position , in order to increase engine speed and operating speed , which is light- load operation of the tractor engine is very unfavorable . For example , planting, ground transportation, cultivation and irrigation , processing and other operations, because the unit can not make tractors marshalling operations at full capacity , then increase the throttle will cause increased fuel consumption and reduce economic efficiency. While the engine is operating at the highest speed the engine will accelerate the wear of the friction surfaces Pro , making parts early retirement . Correct use is:

( 1 ) reasonable grouping, the agricultural tractor in the state of full load operation .

( 2 ) When unable to carry full load operation , you should change gear , such as the use of low speed gear and throttle work .

( 3 ) according to the above steps do not achieve the purpose, such as irrigation and drainage pumping and processing operations , can be used to increase the power output shaft pulley diameter of ways to make work tool speed is improved, without applying the throttle approach operations.

2, the spring does not fall before starting crank . Winter farm tractor driver before starting crank crank 10-20 rpm and then start the other seasons do not have to put the crankshaft . Such practices on the grounds that winter oil viscosity , it is not easy to lubricate the friction surface to the body parts , while the temperature is high season, the oil viscosity is small , easy to make the oil reaches the friction surface , this is a misunderstanding . Contrary to fact , locomotive parked overnight, the oil in the warm season , especially in hot summer months, its viscosity lower than in winter , in the journal surface of the oil easier to shed themselves before starting the friction surface is almost no oil state. When starting the engine , the pump will not pump to the respective friction surface for some time , the crankshaft journal and the bearing, such as piston rings and cylinder work was dry state . According to the theory of friction , this semi-dry friction will increase wear and tear , so that the early retirement of these important components , shortening the life of the engine . Therefore, before starting the engine , whether it is winter or summer , should shake the crankshaft is correct.

3 , the warm season not install the thermostat. Some drivers think , in the winter the engine thermostat should be installed in order to facilitate the increased water temperature, while the other seasons you do not need the thermostat , which is wrong. In the engine cooling system installed purpose thermostat is used to control the cooling water forward flow of heat , allowing the engine at different loads , the cooling water temperature rapidly ( usually 3-5 minutes ) to achieve a suitable working temperature 80 ℃ ~ 90 ℃, in order to facilitate reduced engine wear, give full play to its power and economy , and prolong life. Therefore, in the spring, summer, autumn and do not remove the thermostat, replace if damaged should be repaired .

4, the method for parts repair . Currently, instead of using replacement parts repair plan preventive repair has been very common . Every maintenance period will even be able to repair some of the important parts replaced, causing unnecessary economic losses. Agricultural tractors should be through the identification of the parts after the engine is divided into two groups, one group has been to the repair limit , it can not be repaired, or be able to fix but did not fix the conditions , or repair cost is too high, too long, mistake farming season , is used for parts repair . This is not scrapped, but the first ones parts, repair and then replace the old parts . Another group is able to repair , and the cost and lower , it should be repaired, can not always be replaced. With this repair methods , not only saves the cost of repairs , but also improve the quality of repairs .