How to inject cardan crosspieces? just about complex things renoshka.ru

From trucks and SUVs to compact cars and sedans, your vehicle's powertrain system helps keep you on the road.

Also called the driveshaft, the transmission is responsible for shifting your vehicle from idling to driving. A bad or faulty driveshaft can make your vehicle difficult to control. And the main cause of breakdowns is the lack of lubricating mixture in its connections.

How to inject cardan crosspieces? Just something complicated

Quite often, drivers wonder how to inject cardan crosspieces.
This is one of the common questions that beginners ask, but this work needs to be done quite often. At the same time, injecting is not a complicated action; it can be done in any garage, but you will need a tool. And despite the ease of repair, many people are simply afraid to touch the driveshaft themselves; for some reason it is believed that any work with the transmission requires high qualifications. This approach is justified if it is necessary to overhaul the automatic transmission, but the lubrication of the crosspieces can be done independently. How to inject cardan crosspieces is a simple question. To do this, there are a number of devices that make the task easier. It is much more difficult to correctly determine the time when this needs to be done. Here the task is complicated by the need to determine whether the crosspiece needs to be replaced completely, or whether it is enough to simply lubricate it. Below we will look at all these points.

Design features

The driveshaft consists of 2 elements (in some types of equipment there are 3 elements), this allows you to transfer force from the gearbox to the axle with minimal losses. The elements are connected to each other by a cross. This hinge connection allows for optimally secure fastening between the nodes. At the same time, minimal wear of the associated elements is ensured.

The crosspiece requires constant lubrication

, so it is tightly stuffed with a plastic substance at the factory. This allows you to avoid problems during operation. But, unfortunately, there is not enough lubricant for the entire service life, so it must be added.

For process continuity, manufacturers have provided the ability to supply lubricant directly inside the crosspiece, without dismantling the cardan. This makes operational work easier. Also, thanks to this, it is possible to quickly perform injection if necessary.

If you do not lubricate the part, it will fail much faster. It is also worth considering that the crosspiece is almost constantly exposed to sand, dirt and reagents. Therefore, only the proper amount of lubrication can avoid many problems with this structural element.

What are the main parts of the VAZ 2107 cardan transmission?

Parts capable of changing the angle and length of the transmission are the coupling (5), as well as rigid hinges (9.7) and elastic (3). It is called a coupling. The role of the coupling is that it reduces the noise of the connection and angular torque is transmitted. Repair of the driveshaft is required if the coupling material is cracked and crumbled. Simply put, the clutch needs to be replaced.
The cardan coupling consists of 6 rubber parts (30), with metal spacers (31) between them. These parts are tightly connected into a one-piece unit, so in case of failure, the most correct solution is to replace the coupling.
The coupling is placed between the flanges (4,2). They are attached to it with 35 bolts.
Intermediate support (6), which serves to reduce vibrations and various types of beating.
The front shaft of the VAZ 2107 (5) is a pipe with splines installed by welding. There is a tip (40) at the front. One of the coupling flanges is located on it, and the rear splined end is located on the support bearing (6). The bearing itself is well insulated from dirt by seals. Repair of the driveshaft is necessary if the splines are worn out.
The rubber pad (12) in which the bearing is located dampens vibration well. On it, the front shaft may move slightly.
The intermediate cardan support is attached to the bracket (15).
Important is the safety bracket (27), which prevents the shaft from falling out if the coupling fails. If this bracket was not there, then the cars would overturn at full speed, and such cases have happened before. In this case, repairing the driveshaft is impossible; replacement is required.
The difference between the rear shaft (8) and the front “neighbor” is that it has a hinge fork at the ends.
The hinge itself is an important element of the transmission; it consists of a pair of forks (23), one crosspiece (22) and, in a separate figure above, needle-shaped bearings (20) - there are 4 of them, rings (19) and oil seals (21). The bearings are pressed with a fairly large force of about 800 kg into the fork holes. They are non-separable; if they malfunction, they need to be replaced.
The cross has the required gap, from 0.1 to 0.4 mm. Only within such limits is the crosspiece correctly centered. There are rings in five sizes and five different colors for proper alignment. Repair of the driveshaft most often consists of correcting these gaps and replacing the rings.

What and how to lubricate the front door lock?

When is work required?

It is important to correctly determine when to add lubricant, this will significantly increase the life of the spider. According to the manufacturers' recommendations, this element should be lubricated about once every 10-15 thousand kilometers; more precisely, you need to look at the list of scheduled maintenance work.

But it is not always the case that crosspieces can be used freely for the entire time allotted for this by the manufacturer without lubrication. The reasons for this are very different, most often due to rather harsh operating conditions. Often, SUVs that are operated in harsh conditions require increased attention to the driveshaft. This is due to constant contamination of the joint, which leads to the production of lubricant at an accelerated rate.

In any of the above cases, it is simply necessary to eliminate the problem as soon as possible.

Signs that replacement is needed

The reason for replacement is the play of the hinge joint. Its occurrence is signaled by the appearance of various extraneous sounds when the cardan rotates. This may include squeaks, knocks and metallic ringing. The car vibrates when starting from a stop and at high speeds.

When you hear such sounds, you will know that it is time to check the driveshaft. For such a check, you need access to the machine from below, that is, you need a lift, pit or overpass. We check this way:

Roll the car onto a pit (lift, overpass)
Move the gear lever to neutral position.
Get under the car.
Hold the cross with one hand, and with the other turn the cardan back and forth.
You will feel the existing play immediately.
There are 2 crosspieces in the cardan design, check both.

Necessary tool

So, you have established that it is necessary to lubricate the cardan cross once again. It is worth considering that this work cannot be done without a special tool, so you will have to prepare for the process in advance.

First of all, purchase a special syringe for lubricating cardan shafts; it is inexpensive and will last quite a long time. For this work, a lever-plunger type syringe is used. Please note that different models have different holes for lubricant supply, oil seals or nipples may be used, so check this nuance and purchase the appropriate nozzle.

Another point is the choice of lubricant

. Here it is worth familiarizing yourself with the manufacturer's recommendations. In many cases, modern cars use a specialized lubricant that is designed for a specific brand. The result of mixing it with other types of lubricant is quite difficult to predict. Therefore, if the manufacturer accurately indicated a specific brand of grease, it is better to use that particular one. If there are no clarifications on this matter, then you can use any option designed for such an application.

How to inject?

Let's look at the process of doing this work. It is worth noting that on almost all models it is completely the same, there are only minor differences. So, lubrication is carried out in the following order:

Drive the car onto the overpass. Wheel chocks are placed under the wheels;
Clean the cross. To do this, first wipe it with a rag, then wash it with diesel fuel or carburetor cleaner;
Prepare the syringe for use by pumping the required amount of lubricant into it;
They open access to the slots of the crosspiece, and use a syringe to pump the part with lubricant through an oiler. Be sure to open the oiler on both sides; pump until new lubricant comes out from the other side; it will be noticeably different in color.

At this point the work can be considered completed.

conclusions

. As you can see, there is nothing complicated here. To answer the question of how to inject cardan crosspieces, it is enough to know the technical features of this car unit. In general, neither the selection of tools nor the work process itself should cause any difficulties. It is worth considering that the service life of the crosspieces and cardan directly depends on the quality of the lubricant. Therefore, do not neglect this work.

Injection of king pins on a Gazelle

This vehicle was originally designed for operation with increased loads. Consequently, the need for injection of a gazelle is higher than for conventional passenger cars - it is advisable to update the lubricant every 3-4 thousand km. If the car is used in conditions of high humidity, frequent precipitation and low temperatures, injection is required almost daily.

“Symptoms” indicating an urgent lubricant change:

squeaking sound while driving;
heavy rotation of the steering wheel;
feeling of a “stiff” suspension.

Before starting work, we again recommend checking the grease fittings (follow the link to purchase). If there are old “oil nipples” and have not been changed for a long time, then they are unlikely to cope with their tasks correctly. Then the above procedure is repeated - fill the syringe, find the holes (grease nipples) and pump lubricating oil (preferably liquid) through them.

Injection of the cardan shaft crosspiece

Grouting the driveshaft spider is a fairly simple job that must be performed regularly to maintain the transmission in working condition. However, many drivers decide to seek such work at a service station, when it is quite possible to do it themselves. The main thing that is required to perform this kind of work is to have the necessary tools and choose the right way to inject the cardan crosspieces with it. In this article we will consider this issue.

What is a cardan shaft

The job of the driveshaft is to transfer force from the vehicle's gearbox to the axle. Most often it consists of two or three elements interconnected by a cross. The crosspiece is a hinge joint that provides reliable fastening between units with minimal wear during operation of the mating elements.

In order for the crosspiece to fully cope with its functions and not lose efficiency, it needs constant lubrication. When the car leaves the factory, the crosspiece is tightly packed with lubricant, which should be enough for a long time of operation of the mechanism, but at a certain time it runs out and needs to be replenished.

Do-it-yourself recommendations for removing and servicing driveshafts on a Chevrolet Niva

The driveshaft is a key transmission element required to transmit torque to the drive axle. The Chevrolet Niva, as an all-wheel drive car, has two cardans - front and rear.

Principle of operation

While driving, the position of the axles relative to the transfer case is constantly changing. Therefore, to transmit forces between misaligned axes, the distance between which is constantly changing, a cardan drive is used.

The front and rear cardan shafts of the Niva differ only in length. Two types of units can be installed on a car: with crosses or CV joints.

The first design option consists of a tubular shaft, forks with crosspieces. The spline connection, which provides a change in length, is sealed with oil seals.

The cardan with CV joints is made using constant velocity joints. They are installed at its ends instead of crosses, protected by anthers.

Interesting! CV joints ensure smooth rotation of the unit at large bending angles. Therefore, all new Chevrolet Nivas are equipped with CV joint cardans.

Theoretically, the service life of a driveshaft on CV joints far exceeds the service life of a part with crosspieces. However, when the boot ruptures, lubricant leaks out of the constant velocity joint and sand gets clogged into the bearings. Therefore, when using the Niva regularly in rough off-road conditions, crosspieces are more preferable.

When to inject a universal joint on a driveshaft

The list of scheduled vehicle maintenance work should indicate the frequency of injection of the driveshaft crosspiece as recommended by the vehicle manufacturer. On average, the lubricant component must be updated every 10-15 thousand kilometers of the vehicle.

Important: When operating a vehicle in difficult conditions, the service life of 10-15 thousand kilometers is significantly reduced. For example, if we are talking about constant off-road driving, you need to take care of lubricating the crosspiece much more often.

There are several symptoms that indicate that the driveshaft crosspiece needs to be injected:

When the car moves from a standstill, a noise similar to crunching or tapping is heard in the area of the driveshaft;
At high speeds (above 60 kilometers per hour), the vibration of the car and the “shaking” of the cardan are clearly noticeable.

If the above symptoms are observed on the car, you need to inject the driveshaft crosspiece as soon as possible.

Symptoms of a node malfunction

The first sign of a malfunction is that the car pulls to the side

Other components of the chassis may be to blame for this, but if they are working properly, then you should pay attention to the king pins. Most likely, the installation angles of the longitudinal inclination of the element on the left and right are too different

Uneven tire wear can also indicate a faulty kingpin. But this is only if the car's wheel alignment is not disturbed. In this case, one of the main reasons is the wear of the bushings and the pins themselves.

Knocks when driving, especially on a bumpy road, may mean that the kingpin has a lot of play in the bushings or there is a lot of play along the axle.

If, when turning the steering wheel, great effort is required, then, most likely, the pin bushings are turning at the place where the knuckle boss fits, or burrs have formed on their surfaces. The cause may also be contamination of the support bearing of the part and it begins to creak characteristically.

The diagnosis itself is quite simple and can be done by yourself. In the first case, you should jack up the wheel with a jack and swing it vertically. The presence of play of more than 0.5 mm (distance of movement of the outer edge of the brake caliper) indicates wear of the king pin and bushings.

The second diagnostic method is carried out by measuring the gap between the front suspension beam boss and the upper ear of the steering knuckle with a special feeler gauge. The vehicle must be on wheels during this procedure. The gap should not exceed 0.15 mm.

How to inject the cardan shaft crosspiece

To carry out the work of injecting the cardan crosspiece, you will need to purchase a special tool - a syringe for lubricating cardan shafts. It can be purchased at almost any specialized automotive store. Such a syringe has a lever-plunger design and can last for many years.

Please note: Depending on the car model, the technological hole through which the lubricant is “poured” differs. Before purchasing a syringe, you need to determine whether seals or nipples are used, since you will need the appropriate nozzle.

You need to choose the lubricant that will be used for injection based on the recommendations of the car manufacturer. Most often, a lubricant specialized for a specific car model is used, and it is better to purchase it. If you pump a lubricant into the crosspiece that is different from what is already present there, there is a high risk of their “incompatibility,” which can lead to various kinds of problems.

Please note: If the vehicle's technical operating instructions do not indicate which specific lubricant to use for injecting the driveshaft crosspiece, this means that any universal grease will do.

What kind of lubricant should be used for crosspieces?

Manufacturers of oils and lubricants sell a fairly large assortment of materials intended directly for both universal joints and having general positive characteristics for various parts of a car or other equipment. To make the best choice, you need to pay attention not only to the cost of the lubricant and the manufacturer, but also to its main performance characteristics. You can get all the necessary information from your car's owner's manual or from your mechanic.

If we talk directly about the cardan, then a suitable mixture for it should have the following properties:

high anti-corrosion and water-repellent properties;
the lubricant must be designed for use over a wide range of temperatures and pressures (resistance to high temperature and pressure is required);
should be thick and sticky; this way it can remain in place even with high vibration or intense rotation of parts;
must be safe for human health;
mineral lithium compounds are used to lubricate components and parts of the suspension and transmission, so the lubricant for the cross must be combined with them;
the characteristics of the composition should extend the service life of the driveshaft components, increasing the range of its replacement;
the density of the composition should not increase with decreasing temperature;

In a word, the mixture must have high mechanical and chemical properties, maintain density and composition under different extrusion conditions, and also withstand the effects of external aggressive factors.

How to inject a universal joint on a cardan shaft

To carry out the work of injecting the driveshaft crosspiece, you will need to drive the car onto an overpass and install wheel chocks under the wheels. Next, follow these steps:

Remove dirt from the crosspiece. It is recommended to use carburetor cleaner, special cleaning compounds, or simply white spirit for this;
Next, pump the purchased lubricant into the syringe;
Open access to the slots of the crosspiece and, using the prepared syringe with grease, pour grease into the part through the “oiler”.

Important: When pumping lubricant, open the oil can on both sides. It is necessary to pump in lubricant from one side until grease begins to come out from the other side, then we can assume that it is completely filled with lubricant. Please note that the grease coming out from the other side will be different in color.

After completing the steps described above, you can consider the work completed.

Consequences of ignoring a fault

Ignoring the lubrication of crosspieces can lead to the most disastrous consequences, including complete failure of the spare part and breakdown of your car. In this case, you risk not only your life, but also the lives of passengers.

If you do not carry out the procedure, you risk facing the following consequences:

Vehicle vibrations. Worn seals or bushings can cause the driveshaft to vibrate. Failure to properly lubricate spiders, joints, or bushings can cause further damage to other transmission components. Note that tire problems can also cause vibration problems, but they are easy to tell apart. Vibrations caused by tire balance problems are speed sensitive, but driveshaft vibrations are not.
Difficulty when turning. If you are having trouble turning, it may be due to a problem with the driveshaft. A faulty driveshaft can prevent your wheels from turning correctly, making your vehicle difficult to control.
Loud noise. If you hear a loud noise when your car shifts gears, this is another sign of driveshaft damage. The likely culprit is worn crosspieces.
The car shudders when accelerating. If you experience a shudder when accelerating from a stop or at low speeds, a loose weld or a bad center bearing may be to blame.
Creaking noise. An annoying squeaking sound at low speeds can be caused by a lack of lubrication on the spiders. The lubrication procedure will get rid of it.
Clicking or knocking sound. May indicate a worn or faulty driveshaft. Contact your mechanic.

As you can see, in order to ensure long-term and stable operation of your car, in addition to standard maintenance, you must carefully monitor the lubrication of the cardan crosspieces. If you have already encountered the procedure, tell us about it in the comments below the article.

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How and why to syringe the driveshaft crosspieces? blog and news

Let's start today's conversation with a brief excursion into technical literacy.

What is a spider and why a driveshaft?

Every driver generally understands that a driveshaft is a kind of tool that transmits force from the transfer case to the gearbox, and then to the wheels of the car.

For the first time, this principle of energy transfer was described by the Italian mathematician J. Cardano, in whose honor it was later named, was first used in mechanical engineering at the end of the 19th century by Louis Renault and has remained an indispensable element for all-wheel drive and rear-wheel drive cars for more than a century.

The driveshaft consists of a tube-shaped shaft with forks at the ends and two crosspieces.

The crosspiece is a part of the driveshaft that allows for flexible connection of the transfer case and vehicle axles.

The crosspiece is located between two rigidly fixed forks of the propeller shaft and is driven by a system of needle bearings located at the four ends of the crosspiece.

(I’m thinking of inserting a gif with a gimbal from the Internet. It’s hard for the user to perceive in my opinion)

Cross bearings, an element that is in constant extreme conditions. Water, sand, dirt wash out the lubricant, which in the absence of maintenance leads to failure of the crosspiece.

The photo shows that all the needles have fallen out of the bearing and instead of lubricant there is only dirt and ground metal.

How to recognize the imminent “death” of a crosspiece?

1. Starting from a standstill will be accompanied by a characteristic impact with a metallic sound 2. The car will begin to vibrate at speed 3. Before completely falling apart, a characteristic crunch of ground iron will be heard

However, the death of crosspieces can be prevented and their replacement can be delayed indefinitely.

To do this, it is necessary to carry out periodic technical inspection of the transmission, inject the crosspieces at approximately the same time as changing the engine oil, i.e. every five to six thousand kilometers.

Today we will tell you in detail how to carry out injecting yourself, and not give money to services for a service that they can ultimately “provide” to you.

— For highly loaded components and assemblies. — Effective universal grease for automotive, industrial and agricultural work. — Has excellent water-repellent and anti-corrosion properties. Suitable for use on boats, ships and yachts. — Ideal for lubricating bearings, ball joints, water pumps, steering rods, suspension parts, moving and sliding mechanisms operating in difficult conditions and outdoors.

Used for cleaning the surface of engines, spare parts, and industrial equipment. Effectively removes oily stains, bitumen, resin and other contaminants.

3. Grease syringe. Lever-plunger

All injection work can be easily done without removing the units, on any lift or pit. In our case, it was necessary to simultaneously change one of the crosspieces, so the operation is carried out on the removed cardan shaft.

As we said above, crosspieces are in an extremely aggressive environment, so they often look like in the photo. Before starting work, clean the surface with carburetor cleaner, you can also use a professional engine cleaner

For injection we will need a grease syringe - lever plunger or pneumatic, it all depends on the budget, as well as a lithium grease cartridge.

After unscrewing the cap, remove the plastic cap from the cartridge and load it inside the syringe.

After charging, open the top iron cover and screw it back on.

Connect the syringe to the grease nipple and pump. The guarantee that you are doing everything correctly will be the old grease that begins to come out of the cross.

We squeeze out all the old grease from the crosspiece bearings, along with dirt and wear, until red grease comes out.

Now the driveshaft can be installed in place!

Injection of other transmission elements.

Do not forget that in addition to crosspieces, there are other parts that need to be serviced. 1. Splined cardan shaft. On the shaft pipe you can see a grease nipple; it serves to lubricate the spline connection of the two parts of the cardan. It should be injected together with the crosspieces.

Steering tips. Good manufacturers of spare parts always have grease fittings on the steering ends. Periodic lubrication of balls will extend their service for many years.

Steering linkage. By analogy with the tip, it requires lubrication.

That's all! Take care of the condition of your car and it will never get old :)

How to replace a crosspiece

How to remove a suspended gazelle from the cardan.
It is most convenient to change this with the cardan shaft removed. Although, if the vehicle’s ground clearance allows it and there is no way to drive it onto a pit or overpass, then you can do it this way, especially in the case of trucks. You can also remove the shaft without a hole. Although it will take much more time, effort and nerves to repair. In the first case, the procedure will be as follows:

Following safety precautions, you need to block the wheels of the car. After this, you need to engage any gear (so that the driveshaft does not rotate).
Mark the location of all parts that will be removed relative to each other.
Unscrew the cardan bolts (secure the shaft to the axle flange). There are four of them.
Unscrew the suspension bearing mount (two nuts).
Pull the driveshaft out of the gearbox (there is a splined connection).

Once the shaft is removed, the universal joint spider can be removed. To do this, you will need pliers, a powerful flat-head screwdriver, a hammer and a round attachment (rod, tube). Its diameter should be slightly smaller than the diameter of the eyes in which the ends of the cross are secured. It will be much more convenient to work if you clamp the shaft in a vice.

Next you will need to do the following:

it is necessary to remove the fixing rings that hold the ends of the cross in the eyes. For this operation you need pliers. If the rings are too tight, then you should tap them with a hammer through the adapter so that the cups at the ends of the cross sag a little; After removing the rings, you need to knock the cups out of the eyes. This is done using the same attachment and hammer

It is important to remember that striking the cardan itself is not recommended. In the process of removing the cross in this way, the cup that is being struck will move inward, and on the other side of the fork, the cup will come out to a certain limit. In some cases, the cups may fall out on their own, but often they need to be pulled out using various suitable tools: pliers, a gas wrench, and so on.

All four cups are removed in the same way; When the cross is removed, it is advisable to clean the lugs and the fork itself from dirt using a wire brush. It is recommended to go over the internal surfaces with sandpaper, clean the grooves of the retaining rings and wipe everything well from dust.

In some cases, the cups may fall out on their own, but often they need to be pulled out using various suitable tools: pliers, a gas wrench, and so on. All four cups are removed in the same way; When the cross is removed, it is advisable to clean the lugs and the fork itself from dirt using a wire brush. It is recommended to go over the internal surfaces with sandpaper, clean the grooves of the retaining rings and wipe everything well from dust.

It should be separately added that there are special pullers for crosspieces. However, in practice they are used extremely rarely, even in repair conditions at large service stations. Let us add that no special tools are required when replacing the crosspiece, since installing a new part is also not difficult.

The two opposite cups can be easily removed by hand. You must act carefully so that the needle bearing does not crumble. It is important to pay attention to the presence of grease under the cup. The crosspiece is placed between the eyes on the shaft fork, after which the cups are put on. At this stage, they are easily recessed with your fingers as much as possible, and then, using a hammer and adapter, they are lowered so that the grooves of the retaining rings open. Retaining rings are installed. The same operation is performed with the other ends of the cross. Replacement of the cardan cross is complete. Now you can install it back. As already mentioned, it is not always necessary to carry out this type of car repair.

As already mentioned, it is not always necessary to carry out this type of car repair.

Sometimes lubrication is enough. This can be done without removal if a crosspiece with an oiler is installed - a special hole for introducing lubricant. There is nothing special about how to lubricate the cardan crosspieces. For this procedure you only need a special tool - a syringe. You can fill it with either a special lubricant for crosspieces, or use regular lithol

As already mentioned, it is not always necessary to carry out this type of car repair. Sometimes lubrication is enough. This can be done without removal if a crosspiece with an oiler is installed - a special hole for introducing lubricant. There is nothing special about how to lubricate the cardan crosspieces. For this procedure you only need a special tool - a syringe. You can fill it with either a special lubricant for crosspieces, or use regular lithol.