Lifting equipment is actively used in various fields of human life. This is especially true for the repair of various equipment, including automobiles, both trucks and cars. In this article, we will consider an auxiliary lifting device called a hydraulic jack. About its main parameters and the intricacies of choice will be discussed.
Destination
The low hydraulic jack is designed and is used to raise, lower and hold various objects in the set position. This unit was most widely used in the industrial sphere, as well as in the repair and maintenance of cars at service stations, in garages, and in warehouses. In addition, the hydraulic rolling jack 3t is simply an indispensable thing during long journeys by car or bus, because thanks to it, for example, the task of replacing a punched wheel is greatly simplified, and it takes a little time to complete it.
Advantages and disadvantages
Of particular note are two-stem hydraulic jacks. Among the indisputable advantages that these indispensable assistants possess are:
- Big loading capacity concerning their overall dimensions. There are models that can lift up to two hundred tons.
- Optimum stability and rigidity of units.
- The efficiency indicator, which is within 80%.
- The ability to ensure smooth lifting and lowering of the load. The softness of the stroke is ensured by the viscosity of the oil.
- There is no need to apply a lot of effort to the control handle during operation, which makes it possible to use the jack even for a woman.
- Relative cheapness.
- The speed of bringing into full readiness for operation. To do this, the user will need to spend literally a few seconds.
The negative moments of the hydraulic jack include:
- The need for maintenance.
- The presence of some design difficulties.
- The need for storage and transportation in an upright position.
Device
The low hydraulic jack in general consists of the following main components:
- Tank for storing working fluid.
- Control handle actuating the working piston and stem.
- Pressure discharge valve. It is with its help that goods are lifted due to the use of energy from the working fluid.
- Pressure relief valve. Its main function is to return the rod to its original position.
- Pump.
Key points of work
The low hydraulic jack operates on the basis of Pascal's law. Thanks to the reciprocating movements of the control knob, the oil is supplied from the reservoir under the piston, thereby lifting the load. To lower it, open the relief valve. In general, the work of the jack is formed on the property of the relative incompressibility of the liquid, which in the end allows you to form the necessary pressure.
Also, one should not forget that the hydraulic rolling jack 3t does not allow exceeding the permissible load, so with it you should only lift objects with a weight not exceeding the specified load capacity.
Subtleties of repair and characteristic breakdowns
The jack is low hydraulic, although it is a fairly reliable unit, but still it sometimes breaks down. The most common of them are:
- Lowering the rod in spontaneous order after lifting the load.
- Non-return of the stock to its original position.
- The inability to lift the load at all.
Repair of the hydraulic part of the jack often comes down to replacing seals and oil. There is no need to carry out any adjustment operations after that.
Nevertheless, after the final assembly and oil filling, it is imperative to pump the jack several times. This is done in order to remove air from the system, thereby ensuring uniform movement of the rod, that is, the safe operation of the entire mechanism. The pumping process comes down to the fact that it will be necessary to raise and lower the load several times, as well as to maintain the shutter speed at maximum height.
Operational Features
The rolling Matrix jack is made in the form of a steel trolley on wheels, in which the working cylinder is located horizontally. In this regard, it becomes possible to provide the minimum possible pickup height, however, the jack itself must be placed on a hard underlying surface, since its weight is quite large. That is why these devices are actively used in industrial premises and car services, where the floor often has a hard concrete coating, which ensures the stability of the jack during its operation.
When choosing any existing jack, first of all, you should pay attention to the indicators of its carrying capacity, pickup height, stroke size.