Jack hydraulic podkatnoy. Advantages and disadvantages

The indispensable attributes included in the configuration of any car, of course, are the reserve and the jack. These are really the very things without which it is impossible to imagine not only a long journey, but also an ordinary city trip. As for the jacks, they are of three types: bottle, rhombic and roll-up. In the framework of this article, let us consider a jack hydraulic jack-up.

Jacks of this type are used for tire fitting and repair work not only at maintenance stations, where they are an indispensable attribute, but also by ordinary motorists.

How does a hydraulic jack work?

Externally, the hydraulic jack is a trolley, the rigid frame of which is capable of withstanding heavy loads. The principle of operation of such a jack is based on the law of Pascal. Mounted on the base of two communicating vessels, in which the cylinders with pistons are located, are connected to each other by channels having two valves (discharge and suction). At the top there is a lifting platform. The working fluid is, as a rule, technical oil. The oil filling the cylinder when the handle is rocked, filling the cylinder, lifts the piston up. The jack is lowered due to pressure drop when the valve screw handle rotates around the axis.

Recommendations for selecting a jack under the jack

When choosing a hydraulic lifting jack, first of all it is necessary to determine what conditions and for what car it will be used. It should be borne in mind that the hydraulic jacks differ in their payload and lift height. For cars it is usually used a jack hydraulic подкатной 2т (though happen calculated on 5 т) and height of lifting up to 345 mm. If it is planned to lift a car, you need to focus on the height, otherwise the jack may simply not climb up the clearance. It is also necessary to take into account the length of the handle, although there are models with adjustable handle.

In addition, you should determine the manufacturer. In the modern market, these lifting devices are mainly represented by models produced in Europe and China, and the Chinese are divided into professional and personal consumption. An ordinary motorist who uses it on average once a half a year, of course, it is better to purchase a jack for a personal use, a hydraulic jack, whose price is half the size of a professional one.

Like any device, roll-up jacks have their advantages and disadvantages. The advantage of a rolling jack is that it can lift the goods fairly smoothly, without exerting a great deal of effort, and also to stop them precisely at a given height. As a disadvantage can be noted the large weight and dimensions of the device, which may not be very convenient for transportation in the trunk of the car. In addition, to work it requires a smooth smooth surface. Even the slightest bias can lead to the fact that the jack hydraulic jack-up will fail.