How to pump a hydraulic jack, and other questions about the maintenance of lifts. How to pump a hydraulic jack, and other questions about the maintenance of lifts Repair rules and selection of spare parts

Man has invented many devices for lifting weights. Briefly describe the principle of their work - the transformation of the distance traveled into effort.

Consider examples of such transformations:

1. Lever arm. On the long side, the distance traveled is greater and the effort is less. On the short side, the opposite is true;
2. Block system. The cable, passing through a certain number of blocks, loses distance with each loop, proportionally acquiring additional traction;
3. Gears with different gear ratios. The small gear turns quickly and with less effort. Large - on the contrary;
4. Chain (belt) pair. A smaller diameter pulley rotates effortlessly and faster. A pulley with a larger diameter develops a high torque on the shaft at a lower rotational speed;
5. Communicating vessels. Two piston pairs connected to each other operate on the principle of a lever. A piston of a smaller diameter with a small force moves with a large swing. While its larger "brother" moves a short distance with a proportionally increased effort.

A hydraulic jack works on the principle of communicating vessels.

Relatively compact dimensions (compared to the force that the tool can develop) make it indispensable when working with large weights. Portable bottle jacks (this is their second name) develop a force from 1 to 20 tons. Larger specimens can take a weight of 200 tons.

At the same time, hydraulics is one of the most safety devices for lifting weights.

Device, features of the use of a bottle-type jack

The illustration shows the components of the hydraulic lift.

The whole structure fits inside the reservoir with the working fluid. The lifting rod in the lower position is completely recessed into the body. The handle-lever is removable, and in the transport position does not take up much space. Therefore, jacks of this type easily fit in the trunk of a car.

IMPORTANT! Store hydraulic bottle jacks in vertical position. Otherwise, the operating fluid may leak out.

A device capable of lifting a solid SUV (force 5 tons) - has dimensions (taking into account the unfastened handle) not more bottle wine volume of 0.7 liters. One person can handle such a jack.

Nowadays, it no longer takes a lot of people to lift a large load to any level of height. The production of jacks has made it possible to improve the processes of building and repairing cars, since the use of this device is associated with the lowest costs and safety when lifting loads.

The bottle type jack carries out lifting of cargo to a great height, with a carrying capacity of 2-100 tons and more.

The presence of a jack in any garage makes it easier to repair a personal car, while increasing its level. effective use. The mechanism is powered by hydraulics. There are hydraulic jacks according to the design features. They may have one or two plungers, as well as some type of drive device. For example, a manual mechanism has the ability to periodical action, and electric - operates continuously.

Hydraulic lifting mechanisms are divided based on the type of construction into bottle jacks and rolling jacks. The bottle jack belongs to the class of lifting equipment. The device lifts the load to a great height. Such mechanisms have a carrying capacity of 2-100 tons or more.

What work can be done with a bottle jack device

The scope of bottle jacks is a car service related to the maintenance and repair of cars. The bottle type of the jack is widely used in the railway industry, as it allows for the repair of trains.

The hydraulic jack is used as a power unit for presses, pipe benders or pipe cutters. If, after inspecting the mechanism, it can be concluded that the device is in good condition, then work should be started. In combination with a large load capacity, the compact size of the tool allows it to be used in garages, workshops. The device can be transported in the trunk of a car, which makes it possible to replace punctured wheels if necessary.

The mechanism of bottle jacks is reliable. Hydraulic jacks are used in the process of car repair, which must be lifted and fixed at the desired height. For example, the mechanism allows you to remove the wheel of a car for its subsequent balancing using special equipment.

It is convenient to transport it, which is carried out exclusively in a vertical position, since the oil in horizontal position tool can leak. In general, its service life is determined by the number of gaskets and seals in its device.

Back to index

The design of a hydraulic bottle jack and its features

Bottle type shown. Each element that is part of the design corresponds to a certain number, implying the presence in the mechanism:

1. Handles.
2. pump.
3. valve.
4. reservoir.
5. cylinder.
6. Stock.
7. screw.

The suction valve is located on the tank nozzle. This should prevent the process of returning liquid back to the tank if the pump plunger is lowered. The location of the discharge valve refers to the cylinder nozzle, which prevents hydraulic fluid from leaving the cylinder when the pump plunger is lifted.

The valve is opened with a special screw, which allows to relieve pressure in the device. Then the load is lowered to the ground. Generally this design is time-tested.

Connecting the bottle jack to the pump or pumping station is carried out due to the presence of a coupling half of the connection, which is a quick disconnect. It eliminates fluid loss as a result of tool disconnection from the pressure source. The main structural elements are:

The bottle jack's quick-release half-coupling eliminates fluid loss as a result of disconnecting the tool from the pressure source.

1. Frame.
2. Retractable plunger (piston).
3. Working fluid (hydraulic oil).

The body is a guide cylinder for the plunger and at the same time a special reservoir for the working fluid. If the jack has a lifting capacity of up to 20 tons, then the location of its lifting heel is marked in the part of the screw that is screwed into the plunger. Therefore, the initial height of the mechanism can be increased by removing the screw.

The plunger must transfer oil from one common reservoir to another, located under the piston. When oil appears under the piston, it must move. The oil is no longer returned to the common reservoir due to the actuation of the valve. While the plunger is working, more and more oil flows into the reservoir under the piston from the common reservoir.

An integral element of the bottle jack is a liquid that has the characteristics of an incompressible working material. This allows you to smoothly lower and raise the load, as well as fix it at a certain height, ensuring precision when braking.

Spindle oil allows you to smoothly lower and raise the load, as well as fix it at a certain height.

The speed of the lowering process is controlled by the hole necessary for the outflow of a special fluid coming from the cylinder, which may have different composition. It is possible to use non-freezing mixtures, which include the following components:

1. Alcohol.
2. Water.
3. Technical glycerin.

Spindle oil solidifies at temperatures below 35°C. When choosing a bottle jack, the lifting and lifting heights are taken into account, not just the lifting capacity. The load capacity may be sufficient to lift the vehicle, but the travel will be low. This requires control over the level of hydraulic fluid, oil seals and their tightness.

Back to index

Properties and characteristics of the bottle jack

The bottle jack has excellent lifting capacity with little effort.

Jacks are made of plain or of stainless steel, which may be doped. It could also be aluminum. The hydraulic jack, which has a rigid structure, is a stable mechanism with smooth running during its operation.

The device is characterized by braking accuracy, compactness, high efficiency(0.75 - 0.8). It allows you to lift loads from almost zero height. Due to such design features of the jack, its scope is very wide. The design of bottle jacks has its main disadvantages and advantages, since this device characterized by the presence of:

1. Maximum smooth operation of the jack.
2. High odds useful action and excellent load capacity with minimum effort.
3. The special fluid is non-flammable and non-freezing.

The efficiency of the mechanism, reaching 80%, provides a significant load capacity, which is 100 tons or more. This characteristic manifests itself with small efforts applied to the pump plunger, since due to the presence of valves, the force applied to the lever can increase tenfold. Having a low speed, the device has a small lifting cycle, which is not characterized by high altitude.

If the jack has lifted the load, but gradually spontaneously lowers, then the cause must be sought in the bypass valve or cuffs.

Among other shortcomings of the device are noted difficult conditions storage and transportation. The jack is stored and transported in an upright position. Otherwise, there is a spreading of the working fluid, which leaves the volume that is reserved for it.

The jack mechanism is rigid and does not require too much force on the drive handle. A complex device may not only be insufficiently stable, but also not have a very large working stroke, have a large weight and initial height.

Among the properties of a hydraulic bottle-type jack are:

1. Ability to lift weight equal to weight vehicle or other object that needs to be lifted.
2. Stock travel.
3. lift height.
4. Pickup height.

All these properties should be carefully considered before purchasing a new device. For example, the height of the load can vary between 20-60 cm. At the same time, the characteristics of the hydraulic jack should also be taken into account, which are associated with the following indicators:

If corrosion is detected and parts of the jack are damaged, they are replaced.

1. The capacity of the bottle jack, that is, the maximum possible weight of the load being lifted.
2. Pickup height, namely minimum distance between the surface that is the reference (ground, floor, etc.), as well as the pickup itself, which is the reference point of the device, located in the lower working position.
3. Lift height, that is, the maximum distance from the supporting surface to the pickup in the working position from above.
4. The working stroke, which is the distance between the upper and lower working positions of the pickup.
5. Self weight in working order.
6. A gear ratio that shows how the areas of the hydraulic pump plunger and the lifting plunger of the hydraulic jack relate.

The power indicator of the electric pump motor and the force applied to the jack handle will depend on these characteristics.

The jack has become quite widespread. They are in the arsenal of almost every motorist, they can come in handy when conducting various work in a workshop. There are several varieties of such a mechanism, in this case we will pay attention to the hydraulic one. Such a tool transmits force by compressing a fluid. The complexity of the mechanism and its application in complex operating conditions determines that there is a need for repair. You can repair the hydraulic structure with your own hands, but you should take into account all the features of such a process. Consider how to repair a hydraulic jack and what the features of this process may be.

Causes of jack failures

The design of a hydraulic jack can vary significantly. Many professional models can last for long period, but still certain causes can lead to a serious defect.

Malfunctions of the hydraulic jack can be associated with the following problems:

1. Most often, the working cylinder fails, as well as the plunger mirrors. Such a malfunction leads to the fact that the working part does not hold pressure, oil penetrates from the working chamber into the over-piston space. In this case, there are quite a few problems with the use of the device.
2. In most cases, damage to mirrors occurs due to negligence during operation. The hydraulics do not work in this case or have low efficiency. The surface is damaged due to transport in a horizontal position, if this is not foreseen by the manufacturer.
3. Too serious damage to the surface of the mirrors leads to the fact that the liquid begins to flow out, air enters the cavity, due to which corrosion begins to actively develop.
4. Corrosion on the surface causes rapid wear of various seals and cuffs. In their manufacture, rubber is used, which is subject to mechanical impact. As a result of deformation and severe wear, a large number of foreign elements enter the oil, which lead to clogging of installed valves and channels.
5. Mechanical impact, for example, at the time of the fall of the device from high altitude also gives rise to a large number problems. Too strong impact can lead to the appearance of internal or surface deformations of the body, the curvature of the main elements.
6. Excessive load may cause damage to the mechanism. A common problem can be called the curvature of the rod, due to which the chamber also begins to let oil through due to the skew of the main element. Each model of the lifting mechanism is designed for a specific load, which is indicated in the instruction manual.
7. Inappropriate use also leads to major malfunctions. Use a hydraulic jack only on the basis of the manufacturer's recommendations.

Many causes of failure of the lifting mechanism are the result of improper use of the device. In addition, maintenance of some models of hydraulic jacks provides for periodic oil changes. These and many other points are taken into account when considering the operating instructions.

Necessary tools and materials

Do-it-yourself repair of a hydraulic jack can be carried out in your own workshop if you have the required materials and tools. It should be borne in mind that some versions of the lifting mechanism are represented by non-separable structures, and it will be quite difficult to carry out repair work. The hydraulic jack should be disassembled taking into account the features of its design. This may require the following tools:

1. Hammer and chisel.
2. Pliers.
3. Screwdrivers of various diameters.
4. Hacksaw.
5. A set of keys and a gas key.

There are simply a huge number of varieties of hydraulic jacks, so it’s difficult to say exactly which tools you may need to get the job done. In some cases, it is possible to easily access the internal mechanism for maintenance or repair, in others it will take quite a lot of free time to disassemble.

As for materials, it all depends on what kind of malfunction the structure has. very often seals that are made of plastic or rubber fail. With their selection, quite a lot of difficulties can arise, since even a small gap can lead to the passage of the working fluid into the upper chamber (lead to a pressure drop). If we consider damage to the stem or glass, then such malfunctions are solved only by replacing the entire element.

When considering how to disassemble a hydraulic jack, you need to pay attention to the design features. The force in all cases is transmitted through the oil, which has a low compression ratio. As previously noted, in order to ensure a long service life of the device in the condition of frequent use, oil should be changed, as it may lose its performance over time.

The device of a rolling jack does not differ significantly from a conventional thrust jack. The working part was carried out using similar principles. It should be borne in mind that the design largely depends on what the load capacity is. Some models are equipped with a threaded extension that allows you to initially adjust the initial lifting height.

Do-it-yourself hydraulic jack can be repaired in case of malfunction auxiliary elements or the main working part. In most cases, problems arise with the working part. Classic variant execution is represented by a combination of the following elements:

1. piston which has O-rings. It is on him that the pressure of the liquid is applied. Through the combination huge amount seals from various materials the piston does not let oil through even when high pressure occurs. In addition, the design itself is designed for high loads. Application rubber seals allows you to make the element moveable.
2. Cylinder with seals. It is the cylinder that creates the working cavity in which pressure is exerted on the rod. In order to reduce friction during the course of the moving element, the surface is polished to a mirror state. In the manufacture of this element, materials with high corrosion properties are used. The appearance of even insignificant rust leads to the fact that the moving part begins to wear out quickly. Outside, the cylinder is represented by cast iron, which is very susceptible to shock load. Therefore, you should handle the tool in question carefully.
3. Power stock. This element is connected to the piston, set in motion. It is the rod that takes the load that occurs between the lifted object and the piston. Manufactured using high-quality steel, designed for high loads. To prolong its life, the surface is chemically treated to give corrosion resistance. It should be borne in mind that when using a hydraulic jack in violation of the operating recommendations related to permissible loads, the rod is bent. This type of error is extremely common.
4. Throughput systems. In order to supply and remove oil from the working chamber, passage channels are required. They have small size, may become clogged over time.
5. A plunger pump that provides pressure. Most of the devices mechanical type provides for manual pumping of liquid into the working area. Device plunger pump characterized by high reliability, rarely fails.
6. The bleed valve is used to remove liquid from the working chamber. Such a structural element can be implemented in various ways. As a rule, this is a small screw, when turned, due to the pressure exerted on the rod, all liquid is removed from the working chamber.
7. Cuffs and seals. These elements provide insulation of the working chamber and other structural elements. They also provide mobility to the piston rod. In the manufacture of cuffs and seals, plastic materials are used, which are characterized by high resistance to mechanical stress or the effect of the oil used. Important indicators of seals are their outer and landing diameter, as well as rigidity and wear resistance. To find suitable option performance for replacement in many cases is quite difficult.
8. Filler hole to maintain the required oil level in the system. From time to time it is necessary to add oil to maintain the required level. As a rule, when the hydraulic jack is used intensively or transported in the wrong position, the level of the working fluid drops. Some models of the device have an oil level indicator.

In general, we can say that the design is quite simple, but it has a lot of rubbing elements. Many manufacturers create collapsible designs when the seals on the stem are fixed with a nut or other fastener. It should be borne in mind that there are also non-separable versions, the repair of which is several times more complicated.

Jack repair in most cases is quite simple if you have the necessary Supplies. It should be borne in mind that the appearance of corrosion on the surface can significantly complicate the task. Therefore, you need to purchase a special fluid to remove corrosion and oxidation.

Do-it-yourself repair of a rolling hydraulic jack can be conditionally divided into several main stages:

1. The essence of the problem is determined. If the design does not hold pressure, then the seals are likely to wear out. In the case when lifting occurs with difficulty, then there is a possibility of stem deformation or other problems.
2. A complete analysis of the structure is underway. At this stage, the main thing is not to damage the fasteners. It is worth remembering that during the supply of pressure, the working cavity must contain it. Even a minor defect can cause leakage and pressure drop.
3. Inspection of the integrity of the main elements is carried out. In most cases, you can determine the cause of the problem by visual inspection designs. For example, seals may have notches, grooves and other deformations, a slight bend in the stem, low channels throughput due to the accumulation of soot and dirt.
4. After determining the cause of the malfunction, the rolling jack can be repaired.

In most cases, a hydraulic jack can be repaired as follows:

1. After disassembling the structure, the internal cavity is cleaned of various debris. In addition, you will have to completely replace the oil used.
2. Seals can be removed in various ways. As a rule, there is a fixing element, which ensures the immobility of the rubber bands during operation of the device. It is worth considering the sequence of the location of the rubber bands and seals various types. Incorrect installation may result in the device not holding pressure.

As previously noted, stem distortion and damage mirror surface cannot be corrected on its own. Too much wear leads to the fact that it is necessary to replace the entire element or the lifting mechanism itself.

The hydraulic bottle jack has even more simple design. As a rule, it does not require any adjustments. Therefore, after its assembly, you can begin testing and subsequent operation, provided there are no problems. Some manufacturers lifting mechanisms indicate instructions on how to disassemble the device and carry out repairs. Its use makes it possible to significantly simplify the task.

A repaired hydraulic jack should first be checked for proper operation. This is due to the fact that frequent use with improper installation of seals or other errors will lead to rapid wear of the main elements. Therefore, insurance should be provided in case of lifting the car or other mechanisms. When carried out correctly repair work can significantly extend the service life of the hydraulic jack.

Many car owners, and not only them, are thinking about the question of how to repair a hydraulic jack with their own hands without contacting a workshop.

The hydraulic jack is a portable lifting device designed for heavy objects.

A jack is one of the most important tools, you can’t do without it, for example, when repairing a car. With the help of a jack, the body of the machine is raised to a sufficient height so that repairs can be carried out.

Specifics of work and types of hydraulic jacks

One of the reasons for the popularity of hydraulic jacks is the stability of the structure. Because of this, they are able to lift a larger load than mechanical ones. The lifting capacity of the jack depends on the model and can be up to 200 tons. The hydraulic jack works more smoothly, braking is more accurate. work efficiency of this tool is much higher than that of mechanical models - up to 80%.

From the name it is clear that the main component of the design is a special working fluid that acts on the rod, and as a result it moves. Oil is used as a working fluid, therefore, for the operation of the device, it is necessary to periodically evaluate the condition of the valves, seals and the entire system as a whole, and check for the presence of oil.

By design, the tools are:

• two-plunger;
• single-plunger.

Causes of jack failures

The use of high-quality working fluid and regular checks of the condition of the hydraulic unit can guarantee its trouble-free operation for quite a long time. But even high-quality devices are not immune from breakdowns.

There are only two main reasons for the malfunction of the jack:

• obstacle to lowering the mechanism;
• stem deformation.

In the first case, the problems are caused by the formation of rust inside the device, which begins to interfere with the free movement of the mechanism. Protective elements, gaskets or balls may be worn out on the valve and piston, which will also cause the mechanism to jam.

Another common cause of failures is improper operation. Hydraulic jacks require special handling. The instructions say that they can only be transported in an upright position, and this is not always possible. As a result, gradually the working fluid begins to flow out, instead of it, air penetrates into the device. All this leads to a decrease in the efficiency of the jack, and then a complete stop of the hydraulics. Breakdowns caused by the factors listed above are easy to repair on your own.

Rod deformation often occurs when permanent operation device. Reason for exceeding the threshold permissible load. In this case, the stem is deformed and does not pass through the coupling. Repair of the device in case of such a breakdown involves the replacement of the stem. It is useless to level the old deformed rod, since it is made of a special grade of steel, it is almost impossible to try to shape it at home.

Both causes of breakdowns are quite easy to eliminate, the main thing is to know the basic principle of disassembling and repairing the device.

Hydraulic jack repair

Before proceeding with the repair, you need to accurately determine the cause of the breakdown. To do this, the jack must be disassembled. Since all parts are fastened with a threaded connection different diameter, you will have to use a set of keys of different sizes. After the device has been completely disassembled, you need to carefully drain the oil from it and inspect the valve and pistons well.

If rust has accumulated on the parts, it must be cleaned. The stem must be carefully checked for bending. Protective gaskets and rings should be replaced with new ones, because their deformation and wear may not be visible, and the quality should be checked when high pressure. After checking, all parts must be washed well with a special liquid, preferably more than once. The jack remains to be pumped to remove excess air and pour new oil into it. For filling the working fluid, a neck with a screw plug is provided.

According to the type of drive, hydraulic jacks are distinguished:

• with manual drive;
• with electric drive.

Even though there are different types this tool, the principle of operation is the same for all models.

After that, the structure is reassembled, and the process of repairing the jack is considered complete. It remains only to check the quality of the tool. If the hydraulic jack works normally, the repair is completed successfully. If not, you'll have to keep looking for the problem. Most often, the normal functioning of the device can be interfered with by poor-quality or incorrectly filled oil.

Steps for refueling a hydraulic jack

This stage is not always given due attention, and completely in vain. The working fluid is driving force devices. It acts on the rod so that it becomes in the desired position. If there is not enough oil, the jack will not work properly.

Before filling the oil, you must first drain the old one. Then thoroughly rinse the "insides" of the instrument using flushing fluid. You can buy it at construction stores. Flushing the jack is a rather laborious process, especially for a beginner. You will have to fill in the liquid at least two times, while constantly pumping the jack. Do the same with old oil. Not a single drop of the old working fluid should remain inside the tool.

Thanks to these qualities, the hydraulic jack has become widespread among motorists and car repair workers. In addition, it is also used in other types of work, for example, in construction when lifting reinforcing or reinforced concrete structures. More complex structure hydraulic jack in comparison with a mechanical jack leads to the fact that its repair is much more complicated, but when carrying out repairs, you can do without contacting the master. In order to properly repair the tool, you need to in general terms learn how it works.

Then the jack must be set to a low position. To do this, turn the screw valve to the "drain" mark. The cork is twisted. The jack is pumped five times, after which you can fill in oil until the level rises to a special mark. Then the cork is twisted again. The operation is repeated until bubbles no longer appear on the surface, and the amount of oil reaches the set level.

Repairing a jack is a rather laborious procedure than a complicated one. But still best repair- this is the prevention of breakdowns, because it will take precious time and effort to eliminate them. If you follow the recommendations of the masters, you can significantly extend the period of maintenance-free operation of the hydraulic jack.

The quality of the device depends largely on the quality of the working fluid. Therefore, it is worth purchasing oil only of high quality, from reliable suppliers and designed specifically for technical equipment. The type of oil can be any, but for uninterrupted operation instrument in winter time it is worth additionally purchasing a synthetic solution.

In general, it is not recommended to use the tool in cold weather, except in an emergency and for a short time, otherwise the risk of malfunctions will increase. Regardless of the season, the hydraulic jack should only be stored in a warm place, otherwise the device will freeze and breakage will occur. If the jack is used infrequently, then it is enough to replace it once a year. But with constant operation, you need to check the condition of the pump every month, change the oil and flush the mechanism each time.

Oil change work should be carried out only after the entire load has been removed. The repaired tool may only be used after complete assembly.

Repairing a hydraulic jack is not particularly difficult, the main thing is to follow the instructions correctly and perform each stage of work with high quality.

Of great importance for the normal functioning of the tool is the quality of the working fluid, which you need to purchase only from well-known manufacturers. following simple recommendations operation will minimize the risk of breakdowns and extend the life of the tool.

To lift small equipment, such as a car to change a wheel, there is no need to involve special equipment. For this purpose, a lift is used. There are many varieties of such a device. Each of them has its own advantages and disadvantages. Regardless of the cost of the device, it is not protected from breakdowns. You can repair the hydraulic jack yourself if you follow a certain sequence during operation.

Hydraulic jack device (rolling and bottle)

The most popular types of hydraulic lift are rolling and bottle. Such devices have their design features. So the device of a hydraulic bottle jack includes a handle, a pump, a cylinder, a reservoir, a stem, a valve and a screw.

WATCH VIDEO

The layout of the hydraulic bottle jack is as follows:

• The suction valve is located on the reservoir nozzle. Due to this, when lifting the jack, the hydraulic fluid does not leave the cylinder.
• The valve is opened with special screw. Due to this, the pressure level in the device is reduced, and the lifted load falls to the ground.

The cylindrical fluid is especially important, because it is thanks to it that the load can be smoothly raised / lowered, as well as held at a certain height. It contains spindle oil, water and alcohol.

The principle of operation of a hydraulic jack is that the car is lifted by a horizontal rod resting against a special vertical mechanism. A lifting platform is attached to it, which is responsible for lifting the equipment. To lower the raised device, a special valve opens, after which air is pumped out of the system. Due to the decrease in pressure, a lowering occurs.

Types of breakdowns and their causes (why the jack does not hold)

Most often, the hydraulic jack fails if it is overloaded (to lift loads with it, the mass of which exceeds the maximum for the device), or there are malfunctions in the hydraulics.

The failure in the first case is due to the fact that the thrust rod is deformed. As a result, it bends and cannot pass through the coupling, which leads to its jamming. To restore the functions of the device, it is necessary to replace the stem. The fact is that it is made of special steel, which cannot be leveled.

But hydraulics can fail for several reasons at once:

• The machine oil used instead of the operating fluid leaks out when the lift is stored in the wrong position. As a result, the oil flows out and is replaced by air. Therefore, the operation of the device gradually slows down or stops altogether.
• The inner surface of the hydraulic system is rusting. This leads to the fact that the free movement of the device is disturbed.

Such problems are usually not serious, so you can fix them yourself at home. However, repair of hydraulic jacks is sometimes not possible, so it is easier to purchase a new device.

Do-it-yourself hydraulic jack repair, selection of spare parts

When repairing a hydraulic jack with your own hands, it must be borne in mind that all the constituent elements of the device are fastened threaded connections. Therefore, before starting repairs, the device must be disassembled.

WATCH VIDEO

Repair kit for hydraulic bottle jack includes spanners and wrench. Then you should follow this sequence of actions:

1. Drain the oil into a prepared container.
2. Remove the piston and valve and inspect them carefully. If necessary, both elements are cleaned of rust accumulated on them.

1. Check the support rod for bending. most frequent malfunction is that the hydraulic jack does not lift the load. In this case, the support rod may be deformed and must be replaced.
2. In addition, it is necessary to pay attention to the condition of the gaskets. If one of structural elements deformed, in this case it will be possible to repair the hydraulic jack by replacing the broken part. Even if outwardly the gaskets seem to be intact, it is recommended to replace them - often the damage is not noticeable to the eye.
3. If oil is leaking, then most likely the oil valve needs to be cleaned of dirt. Indeed, because of its appearance, the ball does not sit well in its nest.

Do-it-yourself repair of a hydraulic rolling jack ends with washing all parts with a special liquid. Then you should assemble them in reverse order. Before disassembling the device, it will not be clear what exactly led to its breakdown. Therefore, in principle, all types of faults are corrected according to one algorithm, however, in different occasions various parts need to be replaced.

When selecting spare parts, it must be taken into account that they must fully correspond to the deformed parts.

How to fill in oil

Necessarily repair of jacks ends with the renewal of the working fluid. Before pouring oil into the hydraulic jack, you need to check that the air is completely bled. Otherwise, after that, the system will not work at full capacity. How to pump a hydraulic jack?

To do this, turn the outlet valve counterclockwise. The device must be fully lowered. You can bleed the hydraulic rolling jack yourself without the use of additional tools.

WATCH VIDEO

Then you should find a hole designed to fill the oil. It is located on the tank in which the hydraulic fluid is stored. Remove the bolt from the filler neck, insert the nozzle and pour oil. When the liquid begins to flow out, you need to stop pouring it.

Tips for the correct operation of the jack for 5 and 12 tons

In order not to have to repair the rolling jack with your own hands, it must be properly operated. You can not lift with it a load exceeding the maximum allowable - 5, 10 or 12 tons.

Loads should be lifted smoothly, without jerks. Before climbing under the car, you need to make sure that it is stable. Otherwise, the car may fall on a person, resulting in injury.