Today, major manufacturers of automobiles began to make cars, change tires that need only two times per year: winter to summer and vice versa – it is easy to patch a puncture with special shawl or sealant. 99% motorists in that case just change the wheel. As if there were not, but without the jack going. when and what will happen to the wheel, unaware of any motorist. So always have a jack and the "spare tire" is a must. But jack jack – are different. And one turns the wheel assembly in the devil's torments, the other can be useful in an unpredictable situation.
take a look at what are the jacks, which one and how to use them properly. On the principle of actuation of the hoisting mechanism, they are divided into mechanical and hydraulic. Mechanical jacks – they all mans car coming off the conveyor car factories. Which, in turn, divided into parallelogram lever and or folding. Lever is now almost not produced or sold, and sold a great variety of folding. they are used to service the small vehicles, whose gross weight does not more than two tons. A relatively small load is compensated by the simplicity, small size and reliability.
For larger vehicles used hydraulic jacks. They are much stronger, however, and much more influential. Hydraulic jacks are also divided into two types – and telescopic lever or movable. The role of the first lifting mechanism is hydraulic piston mechanism directly, the other hydraulic cylinder pushes for lifting the lever, which in turn raises the car.