How to replace the UAZ hub bearing: nuances and analogues

The car uses a lot of technical elements. One such is the bearing of the hub. UAZ is also equipped with them. This is an integral part of any car. After all, it is this bearing that ensures a smooth rotation of the driving and driven wheels around the axis. This site experiences enormous loads. Therefore, it is possible that the bearing of the front hub of UAZ can collapse. What is the resource of this element, what are the signs of breakage and how to make a replacement? About all this - later in our article.

Resource

On average, the life of this element is about 150 thousand kilometers. But it is worth noting that this figure may vary significantly. On one car UAZ "Patriot" the bearing of the hub can serve 300 thousand, and on the other one it can fall to 40.

Why is this happening?

Destruction of the bearing occurs in most cases due to lack of lubrication. It can be washed out of the cage. Especially often this happens on cars that are used on off-road. When crossing the next ford, the water gets not only into the bridges and the box, but also the bearing of the UAZ hub. As a result, the element operates "on a dry" basis. In addition, the bearing of the UAZ hub is damaged in the presence of solid impurities. Dust and dirt will work in the cage as an abrasive. High congestion is also the cause of failure of the wheel bearing. If the machine is often used on rough terrain, be prepared for the upcoming bearing replacement. Also the element does not like big pits. Even on off-road high-profile rubber, all irregularities should be very carefully handled. The hub bearing does not like sloppy driving. In addition, the blows are transferred to other suspension elements. These are shock absorbers and silentblock levers (in the case of the front suspension of the "Patriot"). In rare cases, the cause of the breakdown is the factory marriage. That is why the bearing of the UAZ hub (number 127509 in the catalog) falls apart to 30 thousand, although it has a very different resource.

Correct installation is the guarantee of a high resource

What if after the replacement the element has failed again? And not after 30, but 3 thousand kilometers? It's all about the wrong installation. This is one of the common reasons why wheel bearings fail. If you install the element is not at the right angle (obliquely), then the load on the clip will increase many times. In this case, the detail will be destroyed by the first thousand kilometers. Another important point is the tightening force. If, during the replacement, the master tightened the bearing nut, the load on it will also increase several times. The part will be constantly heated. As a result, UAZ will need to replace the bearing of the hub again.

How to determine wear and tear?

Since this element interacts with the hub, the faults will be connected to the wheel. Determine the faulty bearing is simple enough. On the move, you will hear a "dry crunch" (this is how the spherical mechanisms roll over). This means that the inner casing is broken and the needles twist unevenly. Over time, this sound will be amplified. In addition, the malfunction may be accompanied by vibrations. They can be transferred to the steering wheel and the body itself. It's extremely dangerous to ride on such a car, because there is a risk of a wedge of the wheel. At high speed, this can cause an uncontrolled drift.

If you ignore the problem further, the car will begin to pull to one side. You will have to constantly grasp the steering wheel to continue straight-line movement.

How to replace? Extract the hub

Fortunately the design of SUVs of Ulyanovsk production is quite simple. Therefore, you can replace the bearing of the rear hub of UAZ with your own hands. So, let's get to work. To begin with, we need to subdivide part of the car, previously tore off the wheel bolts. The car is put on the handbrake. In addition, it is recommended to install wheel chocks. To remove the bearing, you have to remove the entire hub. First remove the brake disc. Next, unscrew the three fixing screws that go to the wheel coupling cap. We remove these elements and turn out six bolts of fastening of the coupling itself. At the same time, you need to fix the hub assembly shovel. Otherwise, it will scroll during the dismantling of the elements. After removing the clutch, bend the latch of the lock washer and unscrew the counternut of the hub itself. Next, remove the washer with a minus screwdriver. Unscrew the hub nut and the hub assembly.

Bearing Replacement

So, the hub in the hands - it remains only to take out the old element and install a new one. To do this, we take a screwdriver and extract the inner ring of the hub. We also get the last element out. Please note that to remove the element you will have to remove the stuffing box. It is disposable and can not be reinstalled. At the next stage, remove the thrust washer of the hub packing and turn the inner bearing ring. All removed elements should be degreased - you can use gasoline or soak the element in kerosene. When installing a new hub bearing on UAZ, pay attention to the state of the elements interfaced to it. It is not allowed to have potholes, scratches and other signs of wear. When changing, both the inner and outer bearing of the hub change.

To extract the old element, use the puller. Carefully squeeze the antennae of the inner and outer retaining ring and take the parts out.

Installation

It is not allowed to install the element with a hammer or other improvised elements. To avoid skewing, use the mandrel. We will press it new rings of bearings. After a successful installation, you should re-check the quality of the element's fit. The bearing rings must not be rotated by the hand. Further assembly is in the reverse order. Important point: watch the moment of a tightening of the bearing. The adjusting nut must be tightened with a force of 30 to 40 Nm. Turn the hand wheel on the subdued car - it should be easy to rotate. In this case, a slight backlash is allowed. Do not tighten the adjusting nut until it stops - there must be a thermal gap for the bearing.

Helpful advice

Before installing the bearing, check the quality of the needle grease. Often manufacturers do not report grease. Because of this, the resource falls significantly. As for the type of lubricant, you need to use only a specialized - for hub bearings. The usual "Litol" or "graphite" does not fit.

Conclusion

So, we found out how to replace the hub bearing on the UAZ car and what its symptoms are. In order to avoid premature wear, it is worthwhile to provide the needle element with a high-quality lubricant and to avoid distortions during installation.