How to choose an oil for a hydraulic jack?
In order to determine the type of oil that will then be poured into the hydraulic jack, you should understand some of the differences between the different groups of these elevators, before filling them with oil.
Hydraulic jacks, depending on the design features, are divided into the following groups:
Depending on the jack group and design, each jack has a different maximum lift capacity, which requires the hydraulic fluid to be compressed to a maximum level.
Hydraulic jack operating principle
It is based on the communicating vessel principle. A force is applied to the actuator handle (motor or handwheel). The leverver transmits the force to the pressure pump. Oil squirts to the bottom of the cylinder when the lever is pulled or the electric motor is started. The piston rises. A bypass valve, which consists of a discharge valve and a suction valve, holds oil pressure at a constant working level. The suction valve is in the suction port of the vessel and does not let the oil back in when the piston is lowered. The discharge valve is installed at the inlet to the cylinder and keeps oil out while the piston is lifted.
To relieve the pressure and lower the weight, the valve must be opened with a special screw.
What is the difference between hydraulic jacks and other types of lifting equipment?
- operate smoothly and quietly due to the fact that the working fluid does not compress;
- very stable;
- the design is rigid and strong;
- small size;
- precise braking;
- low effort and high efficiency (up to 80%);
- precise stopping;
- high load capacity.
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The hydraulic mechanism can work with objects set very low, lifting them off the floor. This is a big advantage compared to other types of lifting devices.
- low operating speed;
- low lifting height;
- inconvenient for transportation (must be placed strictly vertically to avoid oil leakage)
- The lowering height of the load cannot be adjusted.
In the event of a breakdown, repair is more difficult and costly than with its mechanical counterpart. Hydraulic lifting device works with loads weighing from 2 to 200 tons.
Special purpose devices are capable of lifting very bulky loads to great heights, locking and holding.
The hydraulic bottle jack single rod is very easy to use, so its variations are most widely used.
The pick-up has a low seating position and is mounted on wheels. The levers for lifting the load come out of the body. Usually such equipment has a drive handle of sufficient size to reduce the forces exerted. This type of mechanism can only work on a solid and smooth base.
The jack can be used for a long time only if the rules of use are followed exactly. One of the prerequisites. timely oiling, control over its level and cleanliness.
The range of application of the jack is much wider than just using it for changing tires on the car. Any experienced car owner knows when to use this device. But it is important to know how to service and replace the hydraulic material, not only the operating rules.
Unlike existing jacks, the jack is small and lightweight, easy to operate, comfortable and highly reliable. For every car owner such a tool is a necessary and very important thing.
There are several basic types of jacks:
Controls can be manual and electrically operated. Some models can handle loads up to several hundred tons.
Filled up with VMGZ a year ago. works fine. The color had darkened a bit. Took a big tin for. half left. for another replacement. Get rich, I will pour imported))
Thanks for the advice, guys! As a result I used OILRIGHT MGE-46B oil. I will change it once a year. It is cheaper, and in operation we will see.
Turbine oil TP22, seems to have the same viscosity
Pour the VMGZ!Good quality domestic hydraulic oil!I am engaged in service of hydraulic systems and equipment, the oil is cheaper than its imported counterparts!If there is nothing at all then you should use imported oil, but if you don’t have any money, of course the choice is yours!
Imported oil is almost three times more expensive! I wouldn’t spare any money if there was plenty! The jack is new!
To work with heavy equipment, you can’t do without the jack. This device is well known to car drivers. No construction company can do without such an automatic hoist. In order for such an automatic press to work for a long time, you need to know exactly what hydraulic oil to pour into the jack. If you choose the right type of grease, you can achieve high performance of the machine.
The first method is to open the valve and oil reservoir cap, and quickly pump the pump on a hydraulic jack. Then all air is evacuated from the work area. Then you close the oil valve and the oil tank plug.
The nuances of pouring oil into the hydraulic bottle jack Now you can begin to fill hydraulic oil: Remove the bolt or plug from the fill hole and put the oil bottle spout into it. Fill until the fluid reaches a level of 1/8 inch (0.3 cm) under the fill hole.
Oils recommended for use in hydraulic jacks
The standard variant of a fluid for filling in the mechanism is spindle oil I20A. This product is universal and can be used at any time of year. A somewhat different situation is with industrial greases VMGZ, I12A, I30A, I40A or I50A. These compositions will be quite effective only in the warm season, but only for specific models of devices.
How to add or change Hydraulic fluid on Floor Jack
These options are the most common due to their practicality and cheapness. If possible, it is worth to buy specific compositions, especially for hydraulics. The fluid has a low viscosity level, and they combine features and capabilities that meet all requirements.
Tips for the choice of oil
Quite a common issue can be called what kind of oil is poured into the hydralic jack. There are several varieties available for sale:
Synthetic fluids are the most common. They are characterized by increased safety, since the production is represented by a complex technological process. Glycol versions are also widespread, the chemical composition of which determines the high performance characteristics. Glycol oils outperform almost all others in price and quality.
The cheapest version of the performance can be called petroleum or mineral oils. However, before they are poured into the jack jack, you should consider the relatively low performance.
In some cases, used machine oil is poured. It is necessary to use a special oil, because it ensures the long-term operation of the device. The lubricant should be changed at the moment when the device begins to malfunction.
Failure caused by air bubbles
Very often the jack can start to malfunction for such a reason as an accumulation of air bubbles in the working area. This is most often observed when there is very little oil.
Repair of rolling hydraulic jacks with this problem can be done at home. First you will have to remove the plug in the oil tank, while opening the bypass valve. After this procedure, you should do a quick pumping of your jack pump itself. By the way, this should be done at a very quick pace. With the help of this procedure you can transfer the bubbles into the oil reservoir.
Now that you have done this procedure, don’t forget to close the oil tank cap and the bypass valve itself. If you follow all the instructions clearly, your jack will start working perfectly, just as it did when you bought it. If after this procedure you are able to detect air residue, repeat the steps one more time.
The hydraulic jack is based on the principle of a mechanical and hydraulic lever. Applying very little force with a large handle movement results in a high force on the piston rod of a small stroke.
The bottle-type devices are the simplest type of hydraulic jack. There are also jacks, carriage jacks, rhombus jacks, hybrid jacks and other types of jacks.
How it works
The working fluid in these devices plays an important role as one of the structural elements. It also lubricates the components and protects them from corrosion.
When the handle moves upward, the hydraulic jack oil inside the device flows into the plunger pump cavity. The valve separating the pump and the piston rod is closed at this moment. When the handle moves down, the oil from the pump cavity enters the rod cavity and pushes it up. The law of communicating vessels applies. The jack is easy to use and safe to use.
Advantages and disadvantages
The hydraulic jacks differ from other jacks in many ways:
- High capacity
- Low effort required for operation
- High efficiency
- Smooth operation
- Easy handling
The main disadvantages of these devices are relatively low lifting height and impossibility to control the amount of movement while lowering. In addition, the height of common bottle-type devices does not allow them to go under some cars to change the wheel, for example.
One of the reasons for slow or complete stoppage of the jack could be oil leakage during transportation or improper storage. The place of the working fluid is taken by air, which is not good for the function.
Before you fill up with new oil it is a good idea to disassemble the jack and thoroughly clean any dirt or rust from the piston. It is possible to change the gaskets, the damage of which is not always visible. But with prolonged operation, they gradually wear out and under pressure do not provide sufficient tightness.
Oil change is possible by means of a hole with a threaded plug. The unit must be pumped thoroughly beforehand, to drive out all unnecessary air. Drain the old oil and replace it with new oil.
When draining the oil, the metal ball in the valve can be lost. This is an important detail without which the device will not work. Therefore, drain carefully.
No special tools are needed for this. What oil is suitable for the jack, and what oil should never be used? Oil can vary in density, m mineral additives. It is important what kind of oil is used. It must be an industrial oil, suitable for industrial equipment: IZOA, I40A, I30A or I50A. The best way to fill up with hydraulic oil.
to fill up the oil to the special marking on the housing. The oil should fill the housing completely, with no air bubbles or voids. After filling, the jack must be closed and pumped again, raising the piston as far as it will go. Open the plug, refill the oil and repeat until the oil comes out instead of air. This means that it has been done correctly. It is desirable to find a helper: one holds the device in the right position and presses, the other pumps.