You can maintain your car at home after reading it yourself.

You can maintain your car at home after reading it yourself.

Oil maintenance rack;

Maintenance support

This is the most cost-effective and simple "jack" in my opinion, and the use method is also very simple. When in use, put it directly on the path of the front wheel on the dry, horizontal and hardened road surface, then slowly control the throttle and drive it slowly. After driving up, the whole front of the car is lifted; ? Remember to pull the handbrake and then remember to pull the handbrake. To be on the safe side, it is best to put bricks or wooden blocks behind the rear wheels, so you don't have to worry about slipping. It is convenient to change oil or gearbox oil. I used it many times in previous programs.

Disadvantages of maintenance support However, this support also has disadvantages. The first disadvantage is that the first time you drive it, you may rush down directly because of poor throttle control, which will cause the luggage rack to roll to the bottom of the car, which is very embarrassing; The second drawback is that after the car is parked on it, it is in an inclined state, and it is impossible to correctly check the position of engine oil and gearbox oil. Therefore, it will be more troublesome to change the oil and gearbox oil before driving it down, and then open the shelf to check whether there is oil leakage.

The one-time investment in maintaining the support is finally the price. Ordinary family cars use 3 tons of engine oil maintenance bracket, and the price is around 200 ~ 500 yuan. So in general, if you master the skilled oil changing technology, buying a bracket is equivalent to a one-time investment. In the future, you only need to buy a pot of engine oil and a machine filter to change the engine oil, and the right engine oil is worth it.

Horizontal jack and safety support

The horizontal jack and safety bracket put these two together because they can cooperate with each other. Good "gay friends"! The lifting principle of "horizontal jack" is also hydraulic. There is a pressure bar with a length of about 1 m at the tail and four wheels at the bottom, which is convenient to move and very efficient, so it has become the most commonly used jack in repair shops!

The use method of lifting mode is to tighten the pressure bar clockwise, because the pressure bar is also the switch of the pressure relief valve, and then press the pressure bar repeatedly, and the top will rise slowly, so that the car can be lifted. If you want to put down the car, just slowly loosen the pressure lever counterclockwise, and you can slowly put down the car, that's all;

The roof is generally a disc, so there are many places under the car to top it, but I personally recommend putting it on the roof, which is next to each tire, and there is a prominent position under the side close to the car body to strengthen it;

The second position that can be supported under the front and rear trailer hook beams is under the front and rear trailer hook beams of each car, which is also a relatively strong place; The middle of the spindle beam is the middle of the car spindle beam. Yuanbao beam, also called subframe, is also very strong and can directly jack up the whole front of the car.

The position of the lower arm fixing bolt is ultimately the position of the lower arm fixing bolt of the automobile. In fact, this place can also be jacked, but it can't be jacked for a long time, otherwise it may lead to inaccurate positioning of four wheels and can only be used to lift the car for a short time;

The disadvantage of horizontal jack "horizontal jack" is also a disadvantage, that is, it is not suitable for lifting cars for a long time, because most bedroom jacks do not have safety locks. In case of pressure relief, the propped-up car will directly hit the ground, posing danger to maintenance personnel; So the security support came on stage! After the car is jacked up by the horizontal jack, put the safety bracket at the bottom of the car where it can bear the load, and then slowly loosen the pressure relief valve of the horizontal jack, and the car will stop on the safety bracket. At this time, the safety support will replace the horizontal jack to cover the roof.

There is an extra layer of insurance, but if you want an extra layer of insurance, you can also tighten the pressure relief valve of the bedroom jack, then press the jack rod and push it up against the wing beam of the car, so that there are three jacks in the whole front of the car, which is very safe;

It is easier to put down the safety bracket. First, press the lever of the horizontal jack, lift the car slightly, so that the car body leaves the top of the safety bracket, then loosen the safety lock of the safety bracket, and then slowly loosen the pressure relief valve of the horizontal jack, so that the car can be lowered slowly. It's that simple.

Finally, I suggest that if you want to buy a safety bracket, at least buy a steel bracket with a load of more than 3 tons, instead of aluminum, which will be more durable;

Portable elevator

The electro-hydraulic system automatically lifts the car. This is a jack that professional DIY players will buy, and they prefer professional repair shop elevators. When in use, stop the car on the horizontal dry road, then push it under the side beam of the car, hold the original factory jacking positions designed near the four wheels respectively, and then press the up button, and the electro-hydraulic system can automatically lift the car, which is very convenient;

The safety lock is also designed with a safety lock. When the car rises to a certain height, the elevator will become an inclined quadrangle, and a bumper in the middle will go over the safety lock. Then press the down button, and the bumper will support the safety lock. At this time, the bumper will form a stable triangle with the top itself, thus supporting the weight of the whole vehicle and facilitating the maintenance work under the vehicle.

scissor jacks

The way to get down the elevator and the car is also very simple. First, press the up button to lift it a little, then you can release the bumper, and then press the down button, the bumper can pass the safety lock, and the car can slowly descend. It's as simple as that;

Principle of scissor jack At present, more than 90% of ordinary family cars on the market are equipped with this jack at the bottom of the trunk, which is simple in structure and not easy to be damaged. The working principle is also very simple. By rotating a long bolt in the middle, the scissor arms on both sides are pulled to fold and jack up the car. When using the vehicle jack, its top position is very important. Generally, a groove is designed at the top position of this jack, which is specially used to block the top position of the car body; Therefore, a family car equipped with this scissor jack will have a protruding position on one side of each wheel near the body for clamping with the groove on the jack;

The contact area between the roof and the ground is relatively small. One thing that needs great attention when using is to ensure that the car is parked on a level road surface and the hand brake is pulled well. The road surface must be hardened, because the contact area between the roof and the ground is actually relatively small; If it is on the soft gravel road or muddy road, it is impossible to jack the car stably, and even the jack will be damaged, which will lead to the danger of vehicles and maintenance personnel;

When the scissor jack starts jacking at the correct jacking position, you can directly turn the bolt by hand, unfold the jack a little in advance, and then put it firmly on the ground. The groove of the jack is stuck in the middle of the protrusion on the side of the car body, and the jacking position in the above picture is the correct jacking position of the scissor jack; Then you can continue to turn the middle bolt by hand until the rotation begins to be difficult, that is to say, the jack is already jacking the car;

Next, the handle of the household car jack needs to be combined with the hook and the tire wrench to continue to rotate. The handle of a general family car jack is a combination of a hook and a tire wrench. Hook the hook on the tail of the jack, and then connect the tire wrench with the tail of the hook, so that the car can be easily hoisted by rotating the bolt.

Generally, hydraulic jacks on SUVs and off-road vehicles with high chassis are generally assembled on SUVs and off-road vehicles with high chassis. There is a simple reason. The lifting height of scissors jack is very limited, and the car is fine. However, a car with a higher chassis or an off-road vehicle with a longer tire suspension stroke may not be able to completely lift the tires off the ground, and the scissor jack cannot be lifted to the limit height, otherwise it will be dangerous, so a higher and safer hydraulic jack is needed.

The head of the hydraulic jack can rotate to raise the hydraulic jack in the jacking state. Coupled with the scissor jack, it seems that the hydraulic jack is slightly shorter, but in fact, the top of the hydraulic jack can rotate, so it can be higher than the scissor jack, and its top design is toothed disc, so the position of the top is more diversified.

The jacking method designed by the original factory is similar to that of scissors jack. First of all, make sure that the truck stops on a level road, and pull the handbrake to make the road smooth and hard enough. In the choice of top position, priority is given to the place where the tires near the car body have a special top. Generally, cars equipped with hydraulic jacks will design a groove or raised square to match the top of the jack.

Tighten the safety valve clockwise. When in use, lock the safety valve of the jack clockwise. This is the unique design of hydraulic jack. Only when it is locked can the jack be lifted normally. Then put the top cover under the top position, rotate the plug until it touches the top position of the car body, and then repeatedly press the hydraulic rod to jack up the car body;

The key operation of hydraulic jack in lowering the car is how to lower the car body after use, and the owner's brother who operates it for the first time may feel uncomfortable. The key to the operation is how to slowly loosen the air valve and let the car come down slowly, instead of falling down at once;

Loosen the pressure relief valve slowly, so when loosening the valve, do not loosen it with great force at once, but slowly. When you feel loose, don't twist it again, so the car will slowly come down;

After the car has completely landed, loosen the air valve slightly to let the air completely let go, and then you can take out the jack; The above is the usage of hydraulic jack!

Shaking the car body above is the use method and precautions of six different jacks, but no matter which jack is used to lift the car, the car body must be shaken vigorously to ensure that there is no possibility of shaking and overturning, and then the car can be repaired under the car. After all, safety is always the first!