Rear axle bearing size of VAZ 2107

I hope this post will be useful to someone. The essence of the issue: the rear axle is from Niva 2121, the axle shaft needs to be replaced. There are only 21213 in stock in the store... Summary:

Signs of a faulty VAZ 2107 axle bearing

When operating the vehicle, the axle bearing itself may wear out or its seat may break. Any bearing malfunction is easily determined by a number of signs:

• the buzzing of the rear axle increasing with speed, which can turn into a creaking or crackling sound;
• rear wheel play (you can check it by jacking up the car and rocking the wheel with your hands);
• loss of balls when the separator is destroyed (in this case, the axle shaft may move out of its seat while moving);
• jamming of the rear axle when the wheels stop rotating (if a wheel jams at speed, this can cause a serious accident).

The design of the bearing allows for a long mileage of the part, but material defects or excessive loads while driving on bad roads can lead to rapid wear of the unit. In this case, it is necessary to replace the VAZ 2107 axle bearing.

What are axle shafts, why are they needed and how are they designed?

In rear-wheel drive cars, which the “seven” actually belongs to, the rear wheels are driving. It is they, rotating, that make the car move. The torque is transmitted to them from the gearbox through the drive (cardan) shaft, gearbox and axle shafts. There are only two axle shafts: one for each rear wheel. Their role is to transmit torque from the corresponding gear of the gearbox to the wheel rim.

Axle shaft design

The axle shaft is an all-metal shaft made of steel. At one end there is a flange for attaching the wheel disk, and at the other there are splines for engagement with the gearbox gear. If we consider the axle shaft assembly, then in addition to the shaft, its design also includes:

• oil deflector;
• sealing gasket;
• oil seal (cuff);
• bearing.

  
  In addition to the shaft, the design of the axle shaft also includes an oil deflector, a gasket, an oil seal and a bearing.

Each of the axle shafts is installed in the corresponding (left or right) rear axle housing. An oil deflector with a gasket and an oil seal are used to prevent lubricant from leaking out of the casing. The bearing is designed to ensure uniform rotation of the axle shaft and distribute shock loads coming from the wheel to the rear axle of the vehicle.

1 — oil deflector; 2 - gasket; 3 - seal; 4 - oil seal; 5 - axle shaft; 6 - casing; 7 — bearing mounting plate; 8 — brake shield; 9 — bearing; 10 — fixing sleeve

Replacing the VAZ 2107 axle bearing

To carry out the work, there is no need to lift the car on a lift or drive it into a viewing hole. Replacing a VAZ 2107 axle shaft or bearing is performed as follows:

• jack up, unscrew and remove the rear wheel;
• remove the brake drum;

• remove the brake pads using pliers to remove the springs;
• using a 17mm socket wrench, unscrew the axle shaft;
• remove the axle shaft from the seat (for this you need to use a wrench, inserting it between the rear part of the axle shaft and the brake cylinder and using it as a lever);

• remove the old axle bearing;

Oil seals VAZ 2107 (dimensions)

You can order a crankshaft oil seal and other parts of the VAZ 2107, find out the exact price and other useful information in our office or by phone.

When is replacement needed?

The rubber reinforced cuff cannot be restored or repaired. Therefore, it is necessary to replace the crankshaft oil seal or other part on a VAZ 2107 as soon as the seal begins to leak or “take” working fluid.

Most often, replacing the axle shaft seal, gearbox, and gearbox on a VAZ 2107 is necessary under the following circumstances:

• wear due to long use;
• various damages;
• deformation;
• purchasing and installing an oil seal of the wrong size;
• low quality of the product;
• non-compliance of the product with AvtoVAZ requirements.

The oil seal of a VAZ 2107 gearbox or other car mechanism has a certain service life. But a rubber product may become unusable before the warranty period.

For example, the crankshaft oil seal on a VAZ 2107 may suffer after:

• untimely replacement of oil and filter;
• engine overheating;
• poor quality repairs.

And here it is important to remove the old cuff in time and replace it with a new one. Otherwise, oil leakage cannot be avoided.

The importance of choosing a reliable manufacturer

It’s very easy to find a VAZ 2107 crankshaft oil seal on the Internet at a low price. But most of the offers are seals from China, which are well disguised as well-known brands. As a result, the car owner soon notices puddles of oil again and is forced to spend money on a new oil seal again.

MP "CREDO" guarantees compliance of rubber reinforced cuffs with GOST 8752-79, subject to compliance with the rules of delivery, installation, operation and storage.

Our company produces two types of oil seals:

• single-edge;
• single-edge with dust collector.

Modern technologies and reliable equipment allow our company to produce axle seals for the VAZ 2107 and other reinforced cuffs for this car model that meet international standards and AvtoVAZ requirements.

The VAZ 2107 axle seal and other reinforced cuffs are tested for:

• strength;
• hardness;
• cyclicality;
• permanent deformation;
• relative extension;
• rigidity.

The role of rubber

The quality of a rubber reinforced cuff, for example, a VAZ 2107 rear axle gearbox seal, will largely depend on the performance of the raw materials. Our company uses exclusively high-quality rubber. All our mixtures are characterized by a high degree of homogenization, a wide range of operating temperatures and good resistance to all aggressive environments.

Useful tips for replacing the VAZ 2107 axle bearing

When repairing a VAZ 2107 axle shaft, you must adhere to the following tips and rules:

To avoid damaging the axle shaft when cutting off the old bearing with a grinder, it is necessary to saw only the outer ring and the cage. It is enough to make several cuts on the inner ring, and then split it with chisels.

The new bearing is driven onto the axle shaft using a hammer. If you hit the bearing directly, there is a possibility of it being distorted or destroyed. Therefore, the bearing must be filled using a piece of pipe whose internal diameter is slightly larger than the diameter of the axle shaft.

It is unacceptable to heat the bearing before seating it on the axle shaft. A heated bearing enlarges and fits into place more easily, but this may result in “annealing” of the metal, worsening its physical properties. As a result of annealing, the ductility of the metal increases and the hardness of the metal decreases.

Replacing a VAZ 2107 axle bearing is a rather complicated task, but quite doable in a garage. The main thing is not to damage the surface of the axle shaft when removing and installing the bearing. When installing a new bearing, be careful when using a hammer, as the steel from which the bearing parts are made is very brittle. Otherwise, the procedure does not contain complex operations that require special qualifications and equipment.

The problem that will be discussed today is quite common on VAZ 2107 cars. This is the failure of the axle bearing. Replacing it at a car service center is very expensive, but it is possible to carry out this procedure yourself. We will talk about how to do this correctly in this article.

Replacing the axle shaft

Let's look at the process of replacing the axle shaft, its bearing and oil seal in detail. Tools you will need:

• wheel wrench;
• a jack and a safety stand (in extreme cases, a stump or a few bricks);
• wheel stops;
• reverse hammer;
• wrenches 8 mm, 17 mm;
• slotted screwdriver;
• Bulgarian;
• round nose pliers;
• hammer;
• chisel;
• workbench with a vice;
• blowtorch or gas torch;
• spacer made of wood or soft metal;
• a piece of steel pipe with a wall diameter of 33–35 mm;
• Litol type lubricant;
• dry clean rag.

Removing the axle shaft

To dismantle the axle shaft, you should:

1. Place the car on a flat surface and place chocks under the front wheels.
2. Use a wheel wrench to unscrew the wheel bolts.
3. Raise the car body with a jack.
4. Unscrew the wheel bolts and remove the wheel.
5. Using a size 8 wrench, unscrew the drum guide pins.
6. Remove the drum. If it does not come off the blocks, carefully knock it down using a spacer and a hammer.

How to remove a broken axle shaft

If the axle shaft is broken, it will not be possible to dismantle it in the usual way. But there are other methods. If the shaft breaks directly in front of the flange and its broken end sticks out of the bridge casing, you can weld a piece of reinforcement to it, and then use it to pull out the rest of the axle shaft.

If the axle shaft breaks inside the casing, you can try to knock it out with a piece of reinforcement inserted from the back side of the bridge, after first removing the opposite axle shaft. In extreme cases, to remove a piece of shaft, you will have to disassemble the gearbox.

Removing and installing the bearing on the axle shaft

When replacing the axle shaft with a new one, it is recommended to replace the bearing, but if the old one is still fully functional, you can install it too. But to remove it you will need to remove the retaining ring. To do this you need:

1. Securely fix the axle shaft in a vice.
2. Using a grinder, saw through the outer part of the ring.

Installing the oil seal

To install a new oil seal:

1. Wipe the seat with a clean, dry cloth.
2. Lubricate the socket surfaces with grease.
3. Lubricate the oil seal itself with grease.
4. Install the part into the mounting socket.

Installing the axle shaft

Once the bearing and seal are installed, you can install the axle shaft. Installation is carried out in the following order:

1. We install the sealing gasket.
2. Insert the axle shaft into the housing until it stops. Check how the splines engage with the gear teeth by turning the axle shaft in different directions.
3. Apply a few gentle blows with a hammer to the axle shaft flange to make sure it is seated correctly.
4. Install spring washers onto the axle shaft studs. Install and tighten the nuts securing the axle shaft with a 17 mm socket wrench.
5. Place the drum on the shoes and secure it with guide pins.
6. Mount the wheel.
7. Check to see if there is any play in the axle shaft or bearing by trying to shake the wheel along the vertical and horizontal axes.
8. Lower the body and remove the chocks from under the front wheels.
9. Tighten the wheel bolts.
10. Check whether the signs of axle shaft malfunction have disappeared by driving on a flat section of the road.

Video: replacing the axle shaft on a VAZ 2107

As you can see, fixing a faulty axle shaft is not that difficult. And for this it is not at all necessary to contact a service station.

Purpose of the rear axle bearing

The axle shaft is the most important part of the drive (in this case, rear) axle of the VAZ 2107. The axle shaft itself rarely fails, but the bearing in which it is attached is the weak point of this design . The purpose of the part is simple: to ensure smooth and uniform rotation of the axle shaft in the rear axle while the car is moving. This part is located inside the bridge, immediately behind the brake drum. To see and change it, you will have to remove the axle shaft, remove the drum and brake pads from it. It is impossible to get to the bearing in any other way.

VAZ 2107 axle shaft bearing with retaining ring

Malfunctions of VAZ 2107 axle shafts, their causes and symptoms

The main failures of axle shafts include:

• shaft deformation;
• fracture;
• wear or cutting of splines;
• Damage to the wheel rim mounting threads.

Deformation

The axle shaft, although made of high-strength steel, can become deformed under high loads. Such a malfunction is often a consequence of gearbox jamming, bearing problems, or the corresponding wheel falling into a deep pothole. A sign of deformation of the axle shaft is strong vibration of the wheel rim, sometimes accompanied by a hum, knocking, or crackling noise.

Fracture

The result of a wheel hitting a pothole or a strong impact on a bump can be a fracture of the axle shaft. In this case, the car loses control because one of the drive wheels stops rotating. If the axle shaft is broken, the gears of the gearbox may also fail, so if such a malfunction occurs, it must be checked.

Worn or cut splines

Natural wear of the axle shaft splines may appear after 200–300 thousand kilometers. More often they are cut off, which occurs when one of the wheels jams and the gearbox malfunctions. Also, the splines are cut off due to wear of the axle gear teeth that mesh with them.

A sign of wear or cutting of the splines is a crunch (crack) from the axle shaft, which usually occurs when starting or moving downhill. The crunching sound indicates that the gear teeth are slipping between the axle shaft splines.

Damage to wheel threads

It is quite difficult to damage the threads on the flange, but such troubles still happen. The reason for this may be non-compliance with the tightening torque of the wheel bolts, incorrectly set direction of the bolts when tightening, or violation of the thread pitch on the bolts. A sign of thread damage is vertical play in the wheel, or beating in the rear of the car while driving.

If the listed malfunctions are detected, the axle shaft (one or both) must be replaced. Continuing to drive a vehicle with faulty axle shafts is extremely dangerous.

Signs of malfunction on the VAZ 2107

If the bearing itself fails or its seat breaks, the car owner will definitely notice this. We list a number of the main signs of failure of this part:

• While driving, a uniform low hum appears in the area of ​​the rear axle, which over time can turn into a loud creaking or crackling sound. And the faster the car goes, the louder the noise becomes.
• A strong play appears on one of the rear wheels (to check this, just jack up the rear axle of the car and pull the wheel with your hands away from you and towards you).
• Balls fall out of the bearing (this means that the separator in which these balls are located has completely collapsed).
• Finally, the rear axle may simply jam. The drive wheels will stop rotating, and this can happen while driving (which may well cause an accident).

Sequencing

1. The car is jacked up, and the wheel is removed using socket wrenches, behind which there is a worn bearing.
2. The brake disc and pads are removed.
3. Now you need to unscrew the axle shaft itself with a 17 socket wrench.

The axle shaft is unscrewed with a 17 socket wrench.
To remove it from the seat, you can use a crank. It should be inserted between the brake cylinder and the rear of the axle and used as a lever to push the axle out.

Pushing out the axle shaft using a crank

Now you need to remove the bearing from the axle shaft. Often it turns out to be tightly welded to it, so you have to literally cut it off with a grinder. This must be done by first clamping the axle shaft in a vice.

The old bearing is cut off with a grinder

Once the old bearing is removed, the axle must be thoroughly wiped with a rag. And then a new part and a retaining ring are put on the axle shaft.

Installing a new axle bearing

Now, using a medium-sized flat-head screwdriver, you need to remove the worn oil seal from the seat.

The old oil seal is removed with a screwdriver

• As soon as it is removed, a new oil seal is installed in its place (it is most convenient to drive it into the seat with a 32 socket head).
• The axle shaft with a new bearing is installed back into the seat and the entire assembly is reassembled.

Video: How to change it yourself

Important points

The inner ring of the bearing is cut off with a chisel

Symptoms of a problem

Cases of axle shaft failure are extremely rare, unlike bearings. The main sign of a faulty rear axle bearing is a hum in the area of ​​the rear axle wheel. Moreover, its intensity will depend on the speed of movement. If there is significant wear, a squeaking or grinding noise will be heard. Sometimes the bearing simply jams and it begins to rotate in the seat, and this leads to wear and tear and expensive repairs. The reason for its failure can be not only significant and frequent loads, but also simply a significant service life. Bearing diagnostics

Main technical characteristics of VAZ 2107 axle shafts and their elements

Axle shafts for the “seven” in Russia are produced under catalog number 21030–2403069–00. The right and left parts, unlike some other rear-wheel drive cars, are absolutely identical in the VAZ 2107. They have a diameter of 30 mm (for the bearing) and 22 slots. On sale you can also find so-called reinforced axle shafts with 24 splines, but to install them you will need to change the design of the gearbox.

Axle bearing

The bearing is the element that bears most of the loads. And although its declared resource is about 150 thousand kilometers, it can become unusable much earlier. It all depends on the operating conditions of the car, the serviceability of other transmission parts, as well as the quality of its manufacture. The most reliable today are considered to be bearings from the Vologda Bearing Plant, produced under article numbers 2101–2403080 and 180306. Imported analogues have catalog number 6306 2RS.

Replacing the rear wheel bearing

Before starting work, we carry out standard actions to secure it, jack up the car and remove the wheel. Next: 1. remove the brake disc; 2. through the holes of the axle shaft, unscrew its fastenings with a 17 socket head; 3. remove the axle shaft by prying it with a pry bar; 4. cut the locking ring; 5. through the holes that unscrewed the axle shaft, we knock down the bearing;

Don't remove the pads, I removed them to replace them.

We take out the oil seal and clean the seat

Next comes the assembly in reverse order: • install the oil seal; • stuff the bearing onto the axle shaft; • install the locking ring; • install the axle shaft in place.