Step 1: stop and turn on the warning light

The car parked in a safe location, determine whether to pull the hand brake, the block in front of the front, rear or through the rear, to prevent slippery, and open the warning lights, put warning signs. Remove the spare wheel and tire change tools, ready to replace the tire.

Step 2: a diagonal loosening screw

The first jack placed in the chassis bracket card, a handle to form diagonal Screw Twist on the rim of the pine, it does not need to be removed. If the hand is insufficient, with one foot in the hand above, pressed down by weight of the body, can easily be locked screw loose.

If the nut is too tight or corroded or because of other reasons, it is difficult to remove it from exhaustion. It can be unloaded with raffle or glove or a little flammable grease. It can be ignited and burned at the nut which is hard to be twisted. Then the nut can be screwed down when the heat is pulled lightly with a wrench. However, this method only urgently, and pay attention to the fire.

The so-called diagonal form is the choice of the first screw to twist it loose, and the second screws that need to be twisted must be the one that is diagonally opposite to the first screw. This ensures that the tire is evenly unloaded or installed in order to maintain the balance of the tire.

Step 3: raise the car body to replace the tire

With the support and support in the end hook jack set on hand to facilitate. To rotate clockwise along the handle, with Jack to tire off the ground can also ensure that there is enough space to inflate the tyre in the normal reserve. The spare tire can be placed on the bottom of the car in case the car falls suddenly. The jack should be fitted properly, otherwise the vehicle may be damaged. Notice that if you lift a sedan on a soft and smooth ground, you should put an antiskid pad under the jack so as not to sink or slip an accident.

Step 4: fix the screw in diagonal form

Put on the spare screw, ensure the correct position, with the same hand in diagonal form all the nuts were all evenly fasteners. Then slowly twist screw jack off.

Step 5: test the tire pressure to do well

After the tyre is on the ground, the screw is locked once again with the diagonal form. In order to prevent the tire from locking the tire in the air, it will lead to the appearance of the tyre during the driving. When the tire is changed, the tire pressure should be measured first, adjust it to the qualified state, and finally press the upper valve cover. Before driving, make sure that all tools, including jacks and deflated tires are fixed in the place of storage, do not lose on the road.