Suspension - this is the site of the car, which more oftenall is exposed to wear on our roads. The chassis is usually associated with silent blocks, stabilizer bushings, levers and shock absorbers. But today we are not talking about them. In this article we will pay attention to the hub bearing. This is an integral element in every car, no matter what type of suspension is used on it. What are the signs of malfunctioning of this part and how is the wheel bearing replaced? We will find out all this right now.
Symptoms
How to determine if the car needs replacementbearing of the hub? Everything is very simple. It is necessary to make a small test drive on the road with long turns. Accelerate to a speed of 40 or more kilometers per hour, when entering the turn you will notice a characteristic buzz (like a train), which is heard in one of the parts of the cabin. How to accurately determine on which side the bearing is worn? If the buzz comes from the right side when turning the rudder to the left, it means that the right wheel bearing has become unusable. The higher the load on this element (and when it is rotated it increases several times), the stronger this component will be buzzing. Thus, to determine whether a VAZ car is necessary to replace the hub bearing, it is possible without diagnostic stands.
Note that if a failure is detected,It is worthwhile to delay with the elimination of the problem. The crumbling bearing can simply jammed in one moment. At speed, the wheel will lock tight, and the driver suddenly loses control.
Instruments
In order to replace the bearing of the hub successfully, we need to prepare:
- A jack and a spanner.
- New bearing.Pay attention: if your car is equipped with ABS, then the element should be designed for working with ABS. Do not put other bearings. This is often found on budget foreign cars. They are not always equipped with the ABS system, which makes the bearings different (for example, Ford Focus).
- A new nut and lock rings.
- Remover.
- Screwdriver.
- Round nose pliers (can be useful for removing the stopper).
- Grease ("Litol-24").
- Vice and a piece of pipe length of one meter (will serve as a lever).
Work should be done in a covered and well-lit room.
About the Puller
Before starting work, it is worth considering how bestshoot this item. Experts recommend that you perform this operation with a puller. Often, these devices are universal and suitable for different brands of cars. The cost of such a tool is relatively small (up to a thousand rubles), but it will greatly facilitate the work. With the help of a puller, you can carefully remove the bearing without damaging the critical parts in the machine. In work, it is not necessary to use brute force and even more so to use a sledgehammer with a knockout.
В основе съемника лежит стальной стержень, which is connected with several metal paws (usually two or three) for grasping. The paws can be unfolded to remove the element. Such pullers are mechanical, but professional SRTs use more advanced hydraulic analogs. Also note that the replacement of the front hub bearing and the rear has its differences. Therefore, we consider each side separately.
Replacement of the bearing of a forward nave
So, let's get to work. The operation should be performed on a level, firm and dry surface.
In this case, the car itself should stand on the manualbrakes and on the transmission (for reliability you can put anti-chock stops). Then use a slotted screwdriver to remove the bearing cap. Further we tear off the nut of the hub, but completely do not untwist it.
What do you need to do next?
Since we need to access the hub,tear off the bolts of the disk. Next, we jack up the front of the car from the right side and take out the wheel. After that, we completely unscrew the hub nut. Then in the course is a previously acquired puller. Fix it in place with the paws and begin to gently push out the old bearing. It is important to inspect the seat after dismantling. Often the consequence of bearing wear is the presence of water and dirt, which causes increased wear and corrosion. In order for the new element to last as long as possible, you should completely clean the seat from these components. Here any solvent and even gasoline will help us. Next, we apply a new lubricant to the area and install the bearing in the hub with the help of a vice. It is important not to allow a skew. The element should stand as flat as possible. At the end, the bearing is fixed to the axle using a thrust washer and nut. To eliminate backlash, tighten the hub nut. But be careful - you need to tighten with a certain effort. It is better to produce this with a torque wrench. The tightening torque for each vehicle is individual and is specified in the operating instructions.
At the end of the works, we put the wheel into placeand make a test run. It is important to listen to the work of the bearing. It should not emit noises and vibrations. If all is well, the work can be considered successful.
Replacement of rear hub bearing
As experience shows, this operation is performedslightly lighter than in the case of the front. So, how is the rear hub bearing replaced? At the first stage, we need to loosen the hub nut. Similarly, we set the car for the first gear (but do not use the handbrake). Then put the machine on the jack, tearing off the bolts on the drive itself. Then we take the wheel out and use a slotted screwdriver to remove the protective cap.
Дальше при помощи шестигранника откручиваем Pins that hold the brake drum. Remove the cover. The pads themselves need not be dismantled. If the pins do not unscrew, you can apply the "liquid key" lubricant. Next, unscrew the hub nut and remove the washer. Then we pick up the puller. Put the device on the axle with the support. With the help of the paws, we catch ourselves behind the hub. Then tighten the threaded connection with the key. Thus, the hub is easily removed and the bearing ring with the separator and balls remains inside. The inner ring from the shaft must be braked by the bearing. Next, we press out the old parts, having previously removed the stopper with the round-bends.
How to remove the old item?
In the next step, we remove the protective cover andclamp the hub in a vice. Gently knock off the cover. The outer ring can be pressed out by picking up a die of the required diameter (usually about 60 millimeters). To make the bearing on the other hand, you can additionally use spacers.
Installation
Как далее выполняется замена подшипника ступицы?At the very beginning of work, it is important to clear the seat. As with the replacement of the front wheel hub bearing, you can use gasoline or white spirit here. Having completely cleared the area of dirt, rust and dust, proceed to the pressing.
It is important to observe the smoothness of the effort and followso that the element sat down without distortions. Tighten the part in the box and press all the way until the element completely enters the body. For convenience, you can use the old bearing race. It is ideally suited to the internal diameter and will not allow to prevent distortions.
After that, install the hub in reversesequence, tighten the nut, put in place the drum and the wheel itself. Do not forget to install a protective cap. This is an important element that protects the bearing from such destructive components as water and dust. After replacing the wheel bearing is recommended to make a test exit, preferably at a speed of more than 60 kilometers per hour. So we will determine how smoothly the bearing entered the housing and whether there are any extraneous vibrations.
Recommendations
Выполняя замену подшипника передней ступицы (ВАЗ it or a foreign car, it does not matter), it is important to observe the correct tightening of the nut. As we said earlier, this can be done with a torque wrench. However, not everyone has it in stock. How then to be? There is an exit.
In the absence of such a key, you need to producetightening the nut until it stops. And then it needs to be loosened by 60 degrees. After replacing the front wheel hub bearing, rotate the wheel and check if there is excess noise or gnash. In the presence of such signs recommends loosening the nut. But you need to weaken so as to eliminate the play of the wheel itself. Otherwise, at speed, this can cause insane vibrations that are transmitted to the steering wheel and the entire body. But a slight play is allowed. Why? It's simple: if the bearing is tightly tightened, it will overheat. Because of this, the lubricant inside it is heated. As a result, the bearing is no longer lubricated and fails prematurely. Also, experts recommend planting a protective cap on the sealant.
