In detail: do-it-yourself rhombic jack repair from a real master for the site my.housecope.com.
In winter, when lifting the car, it turned out that the jack jammed, does not twist, does not unscrew. I talked to the guys, they say they should throw it away! We will always have time to throw it away, I decided to restore it!
We unscrew the bolts on both sides.
I bought a set of taps and a die - 14 * 1.5 China, stood at 135 rubles.
I drive the thread to the nut with a die.
I unscrew the nut and drive the shaft thread to the end.
Using a tap, I restore the thread in the nut. First first, then second.
I lubricate the axle with lithol and tighten the nut.
It remains to conduct tests! :)
Almost every person now has a car. For some, it acts as an income - this is a taxi, buses, freight, etc. Someone just needs it for movement. But for true motorists, the car is the closest friend who helps out in difficult times and never fails. They take care of it, take good care of it, and repair it on time. Often such people in life are friends with technology and love the instrument. They like to do something with their own hands, because it brings great pleasure. Often, some useful and interesting things for the car are obtained.
For example, it is a good idea to make a jack. Indeed, no motorist can do without this device. Many, of course, will now say that it is easier to go and buy it in the store. But for a true mechanic to build such a thing, especially for your own car, will not be difficult. It is only important to know how to make a jack, and what it will consist of.
Before you start making a jack for a car with your own hands, you need to decide what kind of design it will be. To do this, you need to know the main types of these devices that can be found in stores:
Video (click to play).
Rack. This type has been used for a very long time. It is based on a long metal rail with holes, a lever and a ratchet with a perpendicular end. By pushing the lever down, the ratchet lifts the weight with it. Pulling it up - it works, locking itself into one of the holes closest on the rail along with the load. Then the cycle repeats again;
These are the main types of jacks that are used the most. They are classified precisely by the type of force used (mechanical, hydraulic, etc.), but there are many varieties of them. So, for example, hydraulic devices are haulage, cylindrical, trailed, two-level. That is, there is only one type of jack, but there are several types of it. Therefore, there is a wide choice in order to independently make your own model using a prototype.
It should be said right away that needlework is not easy and requires certain skills. In our case, these are almost all the abilities that a novice mechanic should have:
welding - the most basic thing that is required when working with metal. Since the structure will be assembled from scratch, it will only need to be welded. Moreover, this must be done with high quality, so that in the end you get a durable product;
cutting - it is enough to be able to cut iron with a grinder. It is good if you have the skill of cutting with an oxygen torch;
treatment - it will be difficult without the skill of using a file or grinder;
lathecase - in principle, you can do without it, but if you are fond of this, it will be much easier in the manufacture and processing of some parts;
painting - a hand-made thing must be painted.
If you have the above skills, then there should be no problems in the manufacturing process of the jack. The higher the level of proficiency in the instrument, the better the product will be.
In order to make a jack, there must be a suitable tool. The first step is welding, since it will be used for assembly. It is desirable that it be semi-automatic apparatus with carbon dioxide. Then the seams will be much smoother and there will be no excess slag. The second, and no less important, is Bulgarian... It is good if the assortment includes both small and large. With their help, you will cut steel blanks. You will also need drill, because you have to make more than one hole. To easily handle iron parts, you must electric sharpener... It is key in the fitting process. In addition, it is desirable to have more hand tools: files, needle files, bars, hammers, screwdrivers, rasps, taps with a set of taps, sledgehammers, vices, etc. The more tools you have at hand, the easier the manufacturing process will seem.
The more tools are available, the easier and better the jack will be.
Lathe in any business is an excellent assistant, but not everyone has one. In principle, you can cope without it, but if you have such a unit in your garage or workshop, it will work out much faster. After all, with the help of a milling unit, it is easy to grind or process any part. For example, a bolt or a rod. In general, your machine will be very useful.
It is also worth talking about the material. You can buy it at the market or at the scrap metal collection point. The second option is much cheaper, since at the scrap reception all the metal is rusty and bruised. It is not suitable for exploitation, but as a donor it is just that. It is desirable, of course, to purchase as much as possible. Indeed, depending on which jack you want, you may need additional mechanisms or fasteners that you cannot make yourself. Therefore, be prepared to purchase some of the components on the market.
The base (both the lifting arm and the lifting platform) of the hydraulic jack can be made from a channel. A conventional hydraulic bottle jack is used for the lifting force. To move the jack, wheels can be attached (can be replaced with bearings, rollers or something similar).
Homemade hydraulic rolling jack device
It is recommended to install the bottle jack on a movable platform - "swing", since during operation the jack slightly changes its angle, and some compensation of movements is required. The platform should swing slightly from side to side. It can be made from the same channel by drilling a through hole in the lifting base and placing the "swing" on the bolt so that a small gap of 0.5-1 cm remains between the base and the platform.
To increase the strength of the structure, it is advisable to make braces from rods on both sides of the base. The thicker the rods, the better. They are welded to the base.
The device is powered by a bottle jack. When it is set in motion with a special handle-rod, it rises, which moves the lifting arm upwards.
The process of work of a homemade hydraulic rolling jack
A drawing of such a hydraulic jack for making it with your own hands is shown in the image below:
DIY hydraulic trolley jack drawing
Also see a few video, where you can learn more about how to make a hydraulic jack with your own hands:
