What is the phenomenon of loose hub screws?

Now there is no loose phenomenon of car tire screws, there are several situations:

1. When tightening the screws, the jack has been removed in advance, and the screws are not in place, so the screws must be loosened in this case; 2. When tightening the screws, be sure to be in the jack support, the tire is off the ground, the screw is in place with the hand, when the upper is not moving, there is a slight diagonal afterburner of the tire sleeve, and there is no gap between the tire and the brake disc;

3. After loosening the jack, remove it, and then use the tire sleeve to cross or diagonally on the screws to ensure that the tire screws are evenly stressed;

4. After tightening the screws, check it, then test the car, when running out for 50-100 kilometers, check the state of the screws to see if there is any looseness, support the jack, and start again according to the above steps, in short, the force must be even;

5. Screws and screws need to be replaced;

6. The screw eye of the tire rim is enlarged, and the screw is not tight at all, and it cannot be tightened;

First of all, when the wheel hub is loose, in the process of home decoration, there will be a pimple sound, if the rear wheel is loose, it will feel like the sound of luggage in the trunk colliding. If the screw is severely loose, there will be a more obvious clicking sound.

When you find that the screws are loose and light, you can drive the car to a safe place to stop for inspection, if it is more serious, it is recommended to stop for maintenance in a short time.

The direction is swaying from side to side, and there is a clattering sound while driving.

The responsibility of the screws on the wheels of the car is heavy, and the speed of hundreds of kilometers on the body of a ton is pressed on it. If the installation is not in place during maintenance, the loose screws will encounter huge shear force, and at the same time, the wheels will swing, and the normal direction cannot be controlled, and it is easy to have a vicious accident.

Hub bolts: High-strength bolts for vehicles to connect wheels. The connection position is the hub unit bearing of the wheel! Generally, micro vehicles are used in grades, and large and medium-sized vehicles are used in grades!

The structure of the hub bolt is generally knurled key gear and threaded gear! And a hat head! Most of the T-head hub bolts are above grade, which bears the large torque connection between the automobile wheel hub and the axle!

Most of the double-ended wheel bolts are above grade and bear the light torque connection between the outer hub housing of the automobile and the tire.

If the tire screws are loose during the driving process, it will cause serious traffic accidents, so the car tire screws are also a place that cannot be ignored.

When the hub screw is loose, gently step on the brake when going downhill, the car tire will have a small knocking sound, if the rear wheel screw of the car tire is loose, the sound of the rear wheel will be amplified through the trunk;

Therefore, we will not care about the loosening of the wheel screws, if we find that the driving is not stable and the handling is not good, observe the driving car in the back, and find that the wheels are swinging back and forth. When driving at low speeds, if you can hear a noticeable clicking sound, you should stop driving immediately.

Generally, there may be screw holes grinding If it is the front wheel, it will affect the direction and direction of the car, regardless of the front and rear wheels, it will affect the balance of the whole vehicle, and serious car tires can run away Accidents and traffic accidents occur.

Driving deviation, affecting the balance of the whole vehicle, and serious car tires can run off, and you will become a road killer!

The direction of the tire screws, if you look closely, the left and right wheel screws are in opposite directions, that is to say, the further the design goes, the tighter the screws, this designer has taken into account. As long as it is tightened once, it will not run loose. If it is loose, it is generally caused by the repairman not tightening.

It will affect the direction of the car, affect the balance of the whole vehicle, and serious car tires can run off, causing accidental traffic accidents.

The tire is counterclockwise in the direction in which the screws are relaxed, and clockwise is the direction in which the screws are tightened. Since the Kaitong screws that fix the wheels are tightened, it should be noted that when disassembling the tires to be replaced, do not use a jack to lift the car up, and should first use a socket wrench to loosen the tire fixing screws in diagonal order.

How to tighten the tire screws:

1. The loosening of the tire screw of the car is in the counterclockwise direction: press the left hand in the direction of the center of the tire, hold the wrench with the right hand and lift it up, and the screw will be loosened;

2. The left and right side directions of the tire screws of large trucks are different, the left (driver's seat) is the inverted tooth, and the right side is the straight tooth, that is, according to the forward rolling direction of the car, it is tightened, and the reverse direction is loosened;

3. Remove the screws diagonally; In this way, the stress of the tire will not be concentrated in one piece, which is more labor-saving, and the screw wear will be a little less.

Steps to remove the tire:

1. Remove the anti-theft cover with the on-board tool.

2. Use a socket wrench to gradually loosen the nut counterclockwise in diagonal order. Shenghui.

3. Use the jack to align the special clamping slot of the jack on the chassis of the car and lift the car up.

4. Remove the unscrewed nut and remove the tire.

Precautions for removing tires:

1. Professional tools must be used.

2. It is very difficult to disassemble some run-flat tire models by themselves, and you need to go to a nearby maintenance location to replace them, or call for roadside assistance.

3. Proper use of foot strength can increase the degree of tightening of the nut, but do not blindly kick, causing direct damage to the nut or bolt.

<> "Tips for judging whether the hub screws are loose.

The safety and integrity of the car is an important part of car safety, and whether the screws that tighten the tires are safe is the most negligent place for everyone, how to check whether the tire screws are tightened? In the eyes of friends, I generally don't deliberately check it, and I will introduce you to the tips for judging whether the wheel screws are loose by listening to the tire sound.

When the hub screws are loose, tap the brake when going downhill, and the wheels will make a fine or slight knocking sound, if the rear wheel screws are loose, the sound of the wheels will be amplified through the trunk, which may be mistaken for something placed in the trunk.

When the hub screws are loose, the wheels will swing in the middle of walking, and a more obvious clicking sound will be heard at low speeds.

In order to ensure your own safety, please make sure to develop the habit of checking before getting into the car and driving:

1.Develop a good habit of checking tires and hub screws before getting on the car to prevent accidents such as screws losing flywheels. At the same time, the condition of the body and the deformation of the tires should also be checked.

2.Develop the habit of observing posture training and listening to the sound of the car, once you find that there is an abnormal sound in the operation of the car, you must check it carefully.

3.Develop the habit of regularly checking 4 oil and 2 water, spare tire pressure, and hub screws, and deal with the problems found in a timely manner without delay. If the pressure of the spare tire is insufficient, when the tire is changed, it is found that the spare tire is not available.

4.Special attention should be paid to special circumstances. If you go to the maintenance plant to replace the front and rear wheels, you must carefully check whether the tire screws are tightened, and tighten the screws from time to time to prevent the screws from running out.

5.After running on a bad road, you should check the tires, shock absorbers and other components, pay special attention to whether the tires are damaged, and prevent the tires from being injured and having a major tire accident at high speed.