The vehicle is hydraulic jack, will not start the engine, because the engine vibration or rotation of the wheel, can make the vehicle from sliding down the dangerous jack.

Various models of vehicles to ensure safety, the use of the Jack usually have a fixed position,not by the jack in the bumper, beams and other parts.

Automobile maintenance personnel do not work in the absence of support under the car,replacing the wheel, passengers can not stay in the car, because their movement may cause the vehicle slipped from jack.

If there is no Jack in the hand, can replace the tire according to the different position of differentemergency measures.

Remove wheel lateral tire, the inner wheel can make the car stop with suitable height block of wood or stone on the mat, so that the outer tire hanging replacement. Pay attention to tighten the hand brake and tucked up the front wheel.

Remove the front tires or within the tire, stone or brick car front axle and rear axle pad, in diggingunderneath the tire to be torn down, so that the tire hung can be replaced.