How to use the spare tire jack: how to use it?
Rack jack is the most common jack form in family cars. Rack jack is driven by manpower through lever and gear to lift heavy objects. This jack has two shapes, one is&; Ldquo herringbone pattern. One is a diamond. Advantages: light weight, small volume when folded, and convenient storage. Disadvantages: the bracket is not very strong and the weight of the bracket is limited. Most of them are only used for family cars above 1 ton.
The screw jack supports the weight through the self-locking function of the thread. Advantages: The jack has simple structure, reliable use and strong bearing capacity. Disadvantages: However, this kind of jack generally has heavy self-weight, low transmission efficiency and slow lifting.
Some screw jacks are rotated directly with the original wrench.
Hydraulic jacks with oil pressure lifting are quite time-saving and labor-saving. Its principle is to manually input the oil pressure in the oil storage chamber into the oil cylinder through the one-way valve to lift the heavy objects. Advantages: the vertical speed is very fast, and the maximum load is basically large, about 3 tons. You can see it in most auto repair shops. Disadvantages: However, this kind of jack is much larger than the above two kinds, and it is not convenient to carry. Basically, it will not be put in the toolbox of the family car, and it can only be purchased separately if necessary.
The pneumatic jack is used to inflate the airbag with the help of automobile exhaust. Most of these jacks have a maximum supporting weight of about 4 tons, which is suitable for rescue under quite difficult conditions or self-rescue by off-road vehicles. They are sold in domestic auto parts shopping malls, and most of them are in 500 yuan. Most of them rely on the inflation of automobile exhaust to achieve the purpose of support.
How to use the spare tire jack: what should I pay attention to?
Fix the car completely and support it. This is very important. If the car is not completely fixed before supporting, it is likely to slip during supporting. I saw the car fall off the jack with my own eyes. The good result is that the tools are broken, and the bad result is that the car and even people are broken.
Cushions are needed to lift the soft road. Jack must be used on hard and flat roads. If it is soft ground, such as dirt road or gravel road, it is suggested to put a board or slate under the jack before using it to reduce the pressure and prevent the jack from falling into the soft ground.
Must be supported on the support point of the chassis. When using the jack, pay attention to the need to support it on the special support point of the body chassis. The supporting point of the family car is generally on the inner side of the skirt, like two fins on both sides of the chassis, 20 cm up and down behind the front wheel and 20 cm up and down in front of the rear wheel. This fin protrudes from the chassis steel plate and can withstand considerable pressure. If good operation methods are not followed, supporting the jack on the chassis steel plate is likely to cause unnecessary damage to the chassis. In addition, supporting on the suspended forearm is also a bad operation. If the jack slips and the car falls, the chassis and jack will basically be damaged.
Today, the brief introduction of Bian Xiao Auto ends here. The above is a brief introduction of Bian Xiao Auto on how to replace the spare tire with a jack. When you don't need it, you will use the jack to change the spare tire and tire, and master the method skillfully. Maybe you can do your own work. Then I hope the profile of Bianxiao Automobile can solve the problem for you. If you want to know more, please pay attention to Bian Xiao Auto.
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