Jack is a light and small lifting device that uses a top bracket or bottom pawl to lift heavy objects within its travel range. It has been widely used, with the most common application being in the automotive repair industry. Today, Fang Gong will explain how to use a jack to change tires,

　　For your reference only:

　　Firstly; Loosen the screw cap and lift the car. If there is a cover on the wheel rim, pry out the cover first, so that you can see several screw caps on the wheel rim. Use a wrench to slightly loosen it. After completion, use a jack to lift the car. Generally, there will be a crossbeam under the car with two notches on it, and the jack will be placed between the two notches.

　　Secondly; Loosen the screw cap and remove the tire. As the screw cap was already loosened when the tire touched the ground, it is easy to remove all the screws and remove the tire after the car is raised.

　　Step three; Replace with a new tire, screw on the screw cap and place the new tire in its original position, and tighten the screw cap slightly in diagonal order to ensure that the force on each screw cap is relatively uniform. Finally; Lower the vehicle body, tighten the screw caps, lower the vehicle body, remove the jack, and tighten the screw caps again in diagonal order

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　　The following are precautions for using rear tires in automobiles:

　　1. Always pay attention to checking the spare tire to see if it is leaking or damaged, and frequently rotate the tire.

　　For convenience in carrying, some cars have a rear spare tire that is 30 to 40% narrower than normal tires. These spare tires can only be used for temporary needs in the event of a flat tire, and a normal width tire should be fitted as soon as possible afterwards.

　　When using tires on cars with enlarged front axle brake discs, the spare tire cannot match the screw cap of the brake disc. In case of a front tire explosion, the rear tire can be replaced on the front axle, and then the spare tire can be replaced on the rear axle.