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Description of design
The cardan transmission consists of front and rear cardan shafts, an intermediate elastic support, an elastic coupling, a movable spline joint and two cardan joints. The presence of two universal joints and a spline connection makes it possible to transmit torque from the gearbox to the main gear at an angle that constantly changes during suspension operation. Cardan shafts are made of thin-walled steel pipe. The front shaft has splined ends at both ends, and the rear shaft has universal joint forks. The elastic coupling is designed to absorb vibrations and jerks in the driveline. It connects the gearbox and the front driveshaft through two flanges. Their alignment is ensured by a centering ring on the gearbox shaft and a centering sleeve in the propeller shaft flange. The intermediate support consists of a radial ball bearing mounted in a bracket inside a rubber insulating pad. The bracket is secured to the body using a cross member through vibration-isolating bushings. The cardan joint consists of two forks mounted on shafts, which are connected to each other by a cross. The hollow spikes of the crosspiece are fitted with needle bearings with sealing collars. The bearings are secured in the forks with retaining rings. Currently (since 1988), cardan shafts are equipped with hinges of increased durability. They are equipped with crosspieces with spikes of increased diameter, stamped needle bearing housings, radial-end type seals without a metal clip and a fork of increased thickness. Modern and previously produced crosspieces are interchangeable, but installing “new” crosspieces into the forks of “old” driveshafts is not recommended, since this reduces the overall rigidity of the joints. Below we consider the technology for replacing only the hinges currently installed.
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How can you keep a cardan for a long time without repair and disassembly?
- protect the bottom of the car from large cobblestones, stones, and crushed stone flying at speed into the driveshaft;
- use the correct lubricant CV joint - 4, FIOL - 2u, paint the cardan. Corrosion protection will allow you to maintain alignment longer;
- check accessible connections and protective brackets more often, tighten connections;
- do not be lazy to check the gaps in the hinges and adjust them in a timely manner;
- Inspecting the coupling quarterly for cracks in the rubber or defects will allow you to replace it, otherwise the entire driveline may fail, and this will be more expensive.
- Regularly lubricate the VAZ 2107 driveline.
Downloading a book
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Features of the mechanism
The driveshaft transmits the torque generated by the car's engine to the rear axle, causing the wheels to rotate. It is located under the bottom of the VAZ-2107 car, which is why you can find a raised floor in the cabin.
The cardan on the VAZ 2107 consists of two main parts, which are connected to each other using a cross. This design of the device is necessary because the rear suspension constantly “plays” when driving due to shock absorption. The device is a hollow tube, which is the “arm” connecting the engine to the wheels. Despite the simplicity of the product, the shaft, like other car parts, fails and requires repair or replacement.
Main cardan malfunctions
The main malfunction of the driveshaft is that elements such as the spider and the outboard bearing fail. It is these parts that are the most loaded. The crosspiece and bearing fail for a simple reason - lack of lubrication. Over time, it is necessary to periodically diagnose these elements with the obligatory addition of lubricants. In rare cases, a cardan malfunction may be associated with a defective crosspiece, which requires its replacement.
The malfunctions of the mechanism in question are as follows:
- failure of crosspieces;
- destruction of the outboard bearing;
- violation of the configuration (imbalance) of the shaft;
- breakage of flanges, splines and couplings, which happens under heavy loads;
- excess moisture and dirt inside the crosspieces.
At the slightest sign of malfunction, it is necessary to diagnose the mechanism and eliminate all resulting damage. The malfunction can be identified by the following signs:
- the appearance of a knocking sound when the clutch is engaged, which may indicate wear of the splines or damage to the elastic coupling;
- the occurrence of a grinding noise when the car is moving indicates a lack of lubrication;
- the appearance of vibration when the car is moving, which indicates a violation of the alignment of the product;
- knocking noise during sudden acceleration or braking, which indicates wear of the crosspieces.
We will discuss how to replace the VAZ 2107 driveshaft in the next paragraph.
The process of removing and replacing the cardan
The mechanism is removed for the purpose of carrying out repair work or replacing it with a new product.
Often the driveshaft itself is an unpretentious device, but it is important to periodically check the condition of the bearing, splines and crosses. These are the weak points that need to be periodically looked at and monitored for their condition.
Work on dismantling the cardan is carried out in the following order:
First, you need to secure the car by placing stops under the front wheels, and place the gearshift lever in the “neutral” position. Next, jack up the rear of the car, while suspending one of the drive wheels. We proceed to disconnect the device from the mount to the differential. To do this, you need to unscrew the 4 fastening nuts and then remove the bolts. After unscrewing the fastener, you can separate the product from the differential flange.
It remains to unscrew the two nuts securing the cross member on which the suspension bearing is mounted. After unscrewing, you can dismantle the cardan from the VAZ 2107. Using a wooden hammer, you need to knock out (if necessary) the shaft from the engagement of the splines with the elastic coupling. After the shaft is repaired or replaced, you can install it in place. The installation process is inversely proportional to removal
When installing the product, it is important to ensure that the shaft is positioned correctly.
The driveshaft on cars of the VAZ family is a fairly reliable unit. However, it also needs periodic maintenance. All driveline faults should be repaired as soon as possible. Otherwise, more serious and costly problems may arise.
Problems when paying with bank cards
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- There are not enough funds on the plastic card.
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Purpose of the VAZ 2106 cardan cross
When a car is moving, the axles of the vehicle are not always on the same straight line. They change their position relative to each other and the distance between the axes also changes. On the VAZ 2106, as on many other cars, torque from the gearbox to the rear axle is transmitted through a cardan, at the ends of which crosspieces (hinges) are installed. They are the main link of the cardan transmission, which connects the gearbox and the drive gear of the rear axle gearbox. Another important function is assigned to the universal joint crosspiece - the ability to dampen possible deformation of the universal joint due to the constant movement of all its elements.
The VAZ 2106 cardan cross is designed to connect the rotating axles of the transmission
What are cardan crosspieces made of?
Structurally, the universal joint is made in the form of a cross-shaped part with needle bearings, seals and covers, which are fixed with a stopper.
The device of the cross: 1 - cross; 2 — boot; 3 - lip seal; 4 — needle bearing; 5 - thrust bearing; 6 — needle bearing housing (glass); 7 - retaining ring
Cross
The cross itself is a product with perpendicular axes in the form of spikes, supported by bearings. The material used to manufacture the part is high-alloy steel, which has high strength. Such properties allow the crosspiece to withstand heavy loads for a long time.
Bearing
The outer part of the bearings is a glass (cup), the inner part is a spider spike. The movement of the cup around the axis of the tenon is possible thanks to the needles located between these two elements. To protect the bearing from dust and moisture, as well as to retain lubricant, boots and cuffs are used. In some designs, the end of the crosspiece tenon rests against the bottom of the cup through a special washer, which is a thrust bearing.
The crosspiece bearing consists of a cup and needles, and its inner part is the crosspiece spike
Stopper
Bearing cups in the holes of forks and flanges can be fixed in different ways:
- retaining rings (internal or external);
- clamping strips or covers;
- punching.
On a VAZ 2106, a retaining ring secures the bearing cup from the inside.
