Each car owner needs at least 1 jack in his garage. Sometimes the question arises - do you need to get along with the simple car one that comes with the car, or get something better and more reliable? In today's article, we will consider bottle-type jacks and their principle of operation.
The jacks of the described type are most often preferred by people who are professionally engaged in auto repair. The following factors contribute to this, which undoubtedly relate to the advantages of such a mechanism.
- Big payload. Due to this, jacks of this type can lift from 3 to 100 tons. This mechanism force allows it to serve cargo, agricultural and military equipment and is sometimes used at a construction site for small movements of heavy metal structures.
- The product can work even at low temperatures. Thanks to the working fluid, which does not freeze even at low temperatures, the device works properly even in the wintertime on the street.
- Convenience and ease of operation . During the lifting of the load using a similar mechanism, the force from the operator is necessary only for pressing the pump drive so that the oil from the expansion barrel gets into the working cylinder. More powerful models are equipped with an electric drive or a pneumatic supercharger, in this case no effort will be required from the user at all.
- Unlike common rack models, bottle models have better stability. The working cylinder is combined with a flat metal supporting platform of a large area. Thanks to such support, the whole structure will be very stable.
- The rise is very smooth . This is due to the smooth flow of oil into the working cylinder. There will be no sudden jerks during the ascent. Similarly, lowering is carried out. A smooth ride eliminates the possibility of a load falling and injuring the user.
Like any device, this type of jack has its drawbacks. It is worth noting the main ones.
- Properly transport and store this type of jack only in an upright position. It is not possible to turn over or to one side because of the probability of oil leakage. Carriage in the trunk of the car must take place in a fixed form, in order to avoid overturning it in corners.
- It is necessary to monitor the level of the liquid, top it up on time, and if necessary, make its full replacement. It is important to change the old oil only to a special hydraulic oil. Normal motor or transmission will not work.
- Pickup Height. The vertical design does not allow the device to be installed under a machine with a clearance of less than 15 cm.
Speaking essentially, the listed disadvantages are not significant , given the technical direction of this product. If you have chosen the right tool and look after it competently, then it will serve you for many years without any problems.
Such a device is widely used in all garage workshops for inspecting cars, replacing and removing wheels, and lifting heavy elements of a car. They can be found at many repair and maintenance stations of any kind of transport. They may not necessarily be the main tool, but their presence always helps.
These devices are loved by garage masters not only for their small size and cost, but also for use in many products where a lot of pressure is needed on the part. They are understaffed with various pressure gauges, bypass valves and clamps.
Of these, garage craftsmen very often make hydraulic presses for repair purposes in a garage. Sometimes they are used in car body repair.
The described product does not have many types of execution, because the design is very simple and reliable. However, some differences are still present. In addition to the obvious difference in carrying capacity, products can differ in different heights when raised. In order not to increase the minimum height of pickup, but to increase the maximum reach of the rod, the engineers decided to make a rod consisting of 2 and even 3 sections that slide into one another, as in a retractable antenna. Conventionally, bottle jacks can be divided into:
- single rod;
In addition to the number of rods, sometimes you can find a jack of the described type with a screw pump. These are quite rare models, but they also deserve attention. They can come in handy if they need to be installed in an inconvenient place and pumping with a conventional pump is very difficult. In this case, a metal gimbal will come to the rescue, which comes complete with the jack itself.
Such devices are included in the package for some SUVs, in which the places for supporting the jack on the frame are too far from the threshold of the car. In this case, it is simply not possible to install and work with other types of jacks.
The screw bottle jack DVZ 16 is presented in the video below.
Consider the most common and best-selling bottle jack models.
- Autoprofi DG-8. This model has a pickup height of 200 mm, and if your car is lower, then the tool will not suit you. Other car owners will appreciate this product and will be pleasantly surprised how easily this small device lifts a cargo gazelle. The jack is designed for a maximum weight of 8 tons, the maximum lifting height is 400 mm. In operation, he proved to be quite good, although it is considered a budget. High-quality processing of the working surface of the cylinder reduces the likelihood of premature wear of the sealing ring, and the safety valve eliminates its extrusion under excessive load. The metal heel of the retractable rod still made its fly in the ointment. In order not to damage the metal and not tear off the paint, you will have to lay something softer than the metal between the body and the jack.
- "Bison" 43060-12. Its ability to lift 12 tons has become both an advantage and a disadvantage. The fact that he can lift a lot of weight is a definite plus, but no one has canceled the laws of hydraulics and to lift it you will have to download it for a very long time and persistently. The pickup height here is not small - 230 mm, and the lift height is 465 mm. This model is suitable for heavy work, as evidenced by the extension arm complete with the device. Given the low cost, this product will find its buyer in the form of small repair shops that work with trucks.
- Matrix MASTER 50756. The jack of this company has a robust case in its configuration and is equipped with a safety valve, which allows it to cope with weights up to 5 tons. The minimum pick-up height is 216 mm and the maximum lift height is 413 mm. This budget model will allow for repairs with small trucks and small agricultural equipment. A moderate combination of price and quality will allow such a product to be in various fields and places of application.
How to choose?
Choosing a similar tool, it is necessary to determine in advance the height of the pickup and the maximum lifting height , but of course with the necessary weight, which will lift your jack. Based on these values, you can proceed to the selection. It is necessary to purchase such goods in specialized stores, where you will not only be advised, but also given a guarantee on the goods sold.
Ask the staff for a quality certificate for the purchased product. If for any reason this document is not shown to you or cannot be shown, then it is better to refuse to purchase at such an institution. Be sure to inspect the goods before buying. There should be no visible damage to the sealing lips, and no scratches or cracks on the stem. If this could be found, then ask to replace the goods.
Occasionally, smudges of oil may be present on a new bottle-type jack. This is not always a marriage, most often a design feature. The main thing is that during the operation no smudges were detected.
How to use?
A jack is a fairly easy-to-use device, everyone can handle it. If there is a need to use it, then take the device, install it under the load that you need to lift, for example, a car. Before starting work, check if the bypass valve on the product is closed. To do this, use a special tip on the lever to turn the bolt clockwise until it stops. Now you can start lifting.
If your device is equipped with a pick-up adjustment bolt, and the car itself is much higher than the jack when folded, unscrew the bolt to reduce the distance to the load, but do not unscrew it completely, otherwise you risk damaging the thread. It is necessary to leave 4-5 turns for a secure fit.
Next, we begin to pump oil from the expansion tank into the working cylinder. As a certain amount of oil is inflated, the stem will extend and the load will begin to rise. Having reached a certain height, stop feeding oil, and the device will remain in the set position. Before starting repairs, be sure to remove the lever from the pump, as this may be hazardous to health . Excessive oil flow can provoke a change in the position of the car when this is undesirable.
After completing all the work, it is time to lower the load back, for this you need to send the oil back to the expansion tank. To do this, we need to loosen the bypass valve by slightly unscrewing the bolt.
Under the weight of the machine, the oil will go back and the load will lower itself. Before starting work, read the description of the device in the instruction manual.
Owners of jacks of this type note the reliability of the design and the smooth running of the product. If the product is purchased with a margin, then there are no problems with the lifting height. She is always enough. It is worth noting that such a device is undesirable to store in rooms with high humidity . This will certainly lead to the appearance of corrosion on the metal, which has been faced by many users unaware of this fact.
Consumers noticed that models that ship without special cases are much harder to transport and carry.
According to many customer reviews, it happens that a bypass valve malfunctions. Because of this, the jack does not hold the weight in the set position.