Bendix starter diagnostics and do-it-yourself repairs

In the starter, important importance is given to the bendix, if it breaks down it will not be possible to start the engine. And, if a characteristic metallic sound is heard during startup, this indicates an immediate replacement of this part.

Qualified craftsmen are not recommended to even try to repair the Bendix; according to them, it is much more advisable to replace the old worn-out part with a new Bendix. Such a timely replacement of the bendix, rather than repairing it, will prevent imbalance of internal parts with the prospect of increased wear on the starter motor.

Purpose

Bendix is ​​otherwise called an overrunning clutch, which refers to the working body located in the car starter. Torque is transmitted by a gear from the starter motor to the flywheel of the internal combustion engine. But the gear cannot be in long-term engagement with the flywheel, since the starter should operate for a short time, after which it must cool down. And in order to protect the starter motor from the effects of the internal combustion engine, Bendix is ​​designed.

Diagnostics

Even with extensive experience, it is difficult for a technician to immediately figure out problems in the starter.

After all, the reason for replacing the Bendix can be not only worn-out teeth of the Bendix gear, it can also be worn-out bushings on which the starter shaft is mounted, or there may also be a common reason - damage to the retractor relay. So, in order to identify the cause of this damaged part, experience is needed. Some technicians carry out diagnostics on special stands under several loads:

• Under load;
• Without load.

And for some, it is enough to move their hand to understand the need to replace the Bendix.

Self-replacement

Replacing a bendix yourself is not as simple as it seems at first glance. To change it, even on the simplest domestic car, you will need to remove the starter, and this work can be accompanied by a number of difficult moments. Still, you can try to make the replacement yourself. So what needs to be done:

• Remove the starter. To do this, open the hood and disconnect the negative cable from the battery. The car must be driven into the inspection hole. Using a wrench, unscrew the fastening of the positive battery cable to the solenoid relay. Then the two terminals are removed, paying attention to the condition of the insulation on the wires. Unscrew the bracket using a hexagon. Then, using a spanner, unscrew the bottom bolt that holds the starter. This process is quite troublesome. After this, the upper mounting bolt is turned out and the bracket is unscrewed, with the help of which the starter is attached to the block. After this work, the starter is carefully removed.
• By unscrewing the studs along the entire starter and those that secure the cover, separate the starter into two parts. After removing the brush assembly and rotor, it is recommended to clean all parts of the starter.
• Then you need to remove the retaining ring from the rotor shaft and remove the worn bendix, replacing it with a new one. Immediately check the condition of the bushings and forks. To remove the plug, you need to carefully remove the rubber plug and remove the required element.
• The bushing is pressed out using a head of a suitable size. If these parts wear out, they should be replaced immediately with new ones. The bushings are driven back using a hammer. It is worth remembering that the blows should not be strong and should be carried out through a special wooden lining.
• The starter is assembled in the reverse order, after which its functionality is checked.

Is it necessary to make repairs?

From a theoretical point of view, there is no problem in changing the bendix, but from the practical side of things, it is somewhat burdensome and difficult, but quite doable.

But what about Bendix repair? In principle, according to professionals, conversations about repairing this part should not even arise.

This is explained by the fact that modern machines have almost the same wear resistance of parts located in a single unit. This means that you can be sure that if one gear wears out, then after it, almost immediately, the next one will deteriorate, and so on. Therefore, it is much more practical to completely change the bendix, and besides, the cost of the part itself is low.

What is the sequence of actions

So, to change the bendix you should do the following:

• Removing the starter;
• Starter disassembly;
• Replacing the old bendix with a new part;
• Reassemble the starter in reverse order.

When starting work on replacing the Bendix, it is advisable to completely remove the battery, since even a short circuit can lead to serious consequences. If you have any questions or doubts, you should seek professional advice.

During operation, the starter is exposed to external irritants, it is exposed to dirt and moisture, which adversely affects its functionality. And therefore, a common malfunction of the electric motor may be slipping of the overrunning clutch, better known among car enthusiasts as the Bendix.

In order to avoid significant costs for repairing the starter in service centers, you can carry out this procedure at home. Yes, it’s a difficult and troublesome task, but when you know your “iron horse” from the small cog to the speedometer, you can do everything!

What is Bendix?

The Bendix is ​​a freewheel that consists of a gear and a special device, all located in the starter housing.

The unit is in good condition:

• scrolls in one direction only;
• when you try to turn it the other way, it stops.

How does a starter bendix work? When the ignition key is turned all the way, the bendix is ​​driven by the armature of the retractor relay. The gear meshes with the crankshaft flywheel and spins it. The combustible mixture ignites in the combustion chambers and the engine begins to operate.

As soon as the crankshaft rotation speed exceeds the rotation speed of the electric motor itself, then the overrunning clutch disconnects the gear and the starter shaft.

Characteristics of a starter malfunction

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If we talk about signs of a faulty Bendix starter, then you can hear the noise of a rotating starter when starting the car, but the engine shaft itself does not rotate. This drive gear does not mesh with the crankshaft flywheel. This is the answer to the question: how to check the starter bendix without removing it from the car?

In this case, the bendix on the electric motor needs to be replaced or repaired.

Overrunning clutch repair

You need to take appropriately sized keys, screwdrivers and your “golden” hands! When repairing a Bendix starter with your own hands, the car owner must first try to clean the unit of contamination, without disassembling it (what if it works out, resuscitate it).

To do this you need:

• remove the starter from the car;
• immerse part of the electric motor with Bendix in a container with gasoline for 5-7 hours;
• sometimes go up and turn the clutch gear in a gasoline container;
• remove and dry the unit thoroughly.

If the fault remains, then you need to remove and disassemble the starter overrunning clutch for repair.

How to remove bendix from the starter (using the example of a VAZ 2114)

1. First you need to remove the negative terminal from the battery and, using a wrench, unscrew the upper mounting screws that connect the starter to the clutch housing. There shouldn’t be a third bolt, but if you’re lucky, then you need to be contrived to unscrew it.

2. Now you need to disconnect the wires suitable for the electric motor.

3. At this stage, you can see the condition of the flywheel (its teeth).

4. Next, use a screwdriver to unscrew the two screws located on the starter cover and remove the nut on the solenoid relay (fastening the winding output).

5. Now you can remove the clamp washer and use a wrench to remove the tie bolts.

6. Inspect the bushings for wear.

7. For subsequent actions, take a rubber or wooden hammer, which you need to apply several blows to the lower part of the starter housing and separate it.

8. Visually assess the condition of the windings and brushes.

9. Use a screwdriver to pry up the Bendix ears and remove them from the fork.

10. Now knock down the first retaining ring (you can use a wrench and a hammer), and remove the second with a screwdriver.

11. Remove the overrunning clutch.

How to replace the mechanism?

Take a new overrunning clutch and install it in place of the removed bendix. Be sure to wash all the parts of the mechanism, the grooves of the outer race, and clean the burrs on the working surfaces.

Attention: before assembling the unit, all elements of the mechanism that are subject to this must be treated with lubricant.

After installing the starter in place, connect the battery and start the engine. If all manipulations were performed correctly, then your car is ready for use.

Video: replacing the starter bendix (instructions).

This completes the DIY Bendix repair!

Advice from experienced people

1. During the installation of the starter, it is important to check the integrity of the Bendix gear and the unit drive.
2. The starter should not be dropped; it is a complex electrical device that may be damaged by internal components.
3. Before disassembling the starter bendix, be sure to check the battery charge. This problem often causes false panic and rash actions of the master.
4. If you find a cracked or worn plastic washer, it needs to be replaced.
5. When buying a new Bendix, have the old unit with you. Often different couplings differ from each other in small details that are not visually memorable.
6. When disassembling the starter for the first time, it is advisable to write down the dismantling process on a piece of paper in order to prevent the slightest mistakes when assembling it.

Difficulty disassembling the starter

The most common problem when repairing a Bendix is ​​removing the retaining ring and reassembling it.

The restrictive ring has a slot for a retaining ring. Put on on the opposite side of the Bendix.

When disassembling the solenoid relay, be sure to remove the contacts from the winding so as not to damage the mechanism. When placing brushes inside the holder, it is necessary to visually assess their condition; if delamination occurs, they must be processed on a grindstone and inserted into the holes of the holder.

Checking the Bendix and repairing it without disassembling the starter

You can check the bendix directly on the car without removing the entire unit. To do this you need:

1. Enable transmission;
2. Depress the brake pedal;
3. Start the starter.

If at the same time you hear the sound of armature rotation, then the bendix is ​​slipping and needs to be repaired or replaced with a new one.

To begin with, you can try to carry out minor repairs and remove dirt from the Bendix without disassembling the starter. For this:

• remove the starter from the car ( video instructions at the end of the article);
• immerse it entirely in a container of gasoline and leave it there for several hours;
• Without removing the starter from the container, rotate the clutch gear several times to better flush the grooves;
• remove and dry the starter.

If, as a result of such a “not tricky” repair, the malfunction is not eliminated, you will have to remove and disassemble the overrunning clutch.

Price issue

Finally, it’s worth adding that Bendix is ​​an inexpensive spare part. For example, a Bendix VAZ 2101 (as well as other “classic” VAZs) costs about $5...6, catalog number is DR001C3. And the price of Bendix (no. 1006209923) for VAZ 2108-2110 cars is $12...15. The cost of Bendix for FORD cars of the Focus, Fiesta and Fusion brands is about 10...11 $. (cat. no. 1006209804). For TOYOTA Avensis and Corolla cars Bendix 1006209695 - $9...12.

Thus, repairs are often impractical for Bendix. It's easier to buy a new one and simply replace it. Moreover, when repairing individual parts, there is a high probability of rapid failure of others.

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Principle of operation

The starter Bendix has a gear that contacts the flywheel of the car's engine. In order to start the engine, it is necessary that the starter begins to rotate it at a speed of fifty to one hundred revolutions per minute. It should not rotate faster, as it is not designed for that. He can work intensely only for short periods of time. And it is for this reason that a dangerous situation may arise when the engine itself starts. In this system, everything must work accurately, since the slightest delay can result in ruin for him. In the event that the driver does not turn off the starter in time after starting the internal combustion engine, the Bendix protective element comes into operation.

The speed of the car engine is much higher than the speed of the starter, so the role of the Bendix in this case is to protect the starter from the transmission of torque from the internal combustion engine to it. The bendix rotates only in one direction; it is not rigidly connected to the engine shaft; in a free state it can rotate. And at the moment when the speed of the internal combustion engine begins to exceed the speed of the starter, the clutch (another name for Bendix) rotates freely.

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Structurally, the coupling has the following form: two rings, and between them there are balls or cylinders, which in turn are supported by a spring. Constructive, well-thought-out grooves on the inside of one of the rings in which these cylinders are located make it possible to create jamming when rotating in one direction, and free rotation in the other. Bendix has another common variation - the ratchet overrunning clutch. But this version is usually used on bicycles. But in order to understand the principle of operation of the Bendix, you can take a quick look at it. It is used as a drive; when we pedal, the clutch spins and the bike moves forward, and when we try to pedal in the opposite direction, the brake is applied. I hope my example is clear.

As mentioned above, the Bendix starter may have several more options. For example, the shaft on which the coupling is located has ground splines, which are also the seat of the coupling. The system of operation is the same here: when rotating in one direction, the coupling locks rigidly with the splines, and when it rotates in the opposite direction, it comes off them and rotates freely.

The only significant drawback of the Bendix starter design is its increased and very intense wear. At the same time, the nature of wear is such that very often it is necessary to replace the entire bendix and it is not possible to replace only an individual worn-out part, because all its component parts wear out approximately equally.

Starting system for a modern car

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In those days, one could only dream of starting the engine from inside the car.

Today, motorists have a much easier time than several decades ago, when the car was started with a crank. In those days, one could only dream of starting the engine from inside the car.

Nowadays, it is enough to insert the key into the ignition or press a special button for the car to start. But problems also occur in this case, if the nodes, so to speak, “get sick.” No matter how modern a car is, over time it becomes outdated, and more and more problems arise.

One of them just implies poor engagement of the flywheel by the starter. Why does this happen? Experts, as soon as the topic comes up, mention the problem of the overrunning clutch or bendix.

Purpose of Bendix in a car

An overrunning clutch is a gear mechanism capable of transmitting anchor rotation to the engine flywheel. Thus, the engine starts.

Attention. A prerequisite for trouble-free operation of the components of the automotive system is the removal of the bendix after the engine has been successfully started.

You should know that a clutch is not just a gear, but a mechanism that also develops malfunctions.

To more fully understand the cause of the problem with the flywheel engaging, it will be useful to consider the general principle of operation of the entire starting system.

The starter is a DC electric motor. In some cases, it develops much more power than required. Thus, it becomes possible to run the internal combustion engine with maximum displacement.

In a modern starter, an important role is played by a relay - a special unit that brings the clutch into contact with the flywheel some time before the armature false start. Then only voltage is applied to the starter winding, after which it begins to rotate the crankshaft of the car engine.

The rotation of the crankshaft becomes a source of compression of the combustible mixture, followed by its ignition. As soon as this happens at the right moment, the internal combustion engine begins to function automatically.

At this very moment, the metonymic cycle of the flywheel begins to dominate the revolutions of the starter shaft (armature), and the bendix is ​​already engaged. As soon as the driver turns off the car, the starter shaft no longer rotates, and the traction drive disengages the clutch.

It is important to understand that the bendix itself consists of 2 parts: upper and lower (HFB and LFB). The latter acts in the form of a hollow shaft having two different calibers

One of the parts of the shaft is equipped with splines that transmit rotation of the starter, and the other part contains a cage with rollers.

There is no interaction between the videos and the NCB initially. It occurs only after, when the first revolutions appear. The rollers are brought to the middle, thereby limiting the shaft. This happens in such a way that the shaft can only rotate in one direction. The rollers, thanks to their springs, do not allow them to rotate in the other direction.

Once the flywheel gains speed, it will be able to rotate the bendix. In this case, the rollers move apart, opening the stopper. The gear mechanism returns to its primary position.

Bendix often freezes in the mornings when it is cold. Experienced drivers recommend cranking the starter several times, thereby heating the bendix and enabling its operation.

Possible faults

The design itself is quite reliable; on modern machines it rarely fails. But nevertheless it happens.

If, when starting the engine, the motorist hears characteristic sounds reminiscent of a ratchet, but the engine itself does not start, the reason is most likely in the Bendix. Clicking sounds mean that the starter is trying to turn the engine flywheel, but it doesn't have enough effort.

Bendix Bosch. 1 — overrunning clutch casing; 2 — driven cage with gear; 3 - ring; 4 — washer; 5 - roller; 6 — pressure spring; 7 — driving clip; 8 — buffer spring; 9 and 11 — support cups; 10 — drive fork ring; 12 — retaining ring.

Most often, the teeth of the drive gear fail. It is the gear and rollers that bear the main load during startup. The teeth are destroyed, ground down, and lack a working surface for engagement.

The rollers also wear out and lose their shape, as a result the gear begins to rotate idle and cannot transmit torque. An accompanying failure is often the destruction of the cage in the area where the rollers operate.

Sometimes a breakdown is caused by wear on the starter shaft guides. In this case, the engagement with the flywheel becomes incorrect.

In those models where there are springs, they are also the cause of failure. Over time, the springs stretch, burst, and are lost.

How to check the overrunning clutch

If you are not in a hurry to change the Bendix, then it is worth testing it. To do this, clamp the body of the overrunning clutch, already removed from the starter, through a soft gasket (for example, a rag) in a vice to prevent damage. Try scrolling the bendix left and right. It should only rotate in one direction, because when you try to rotate it, the working part will lock. If the overrunning clutch turns, this means that it will not engage with the teeth and the starter will “thresh” idle. You can determine the serviceability of the gear visually: you will see the “eaten” teeth immediately. But if the starter is stuck, then you can understand this only by disassembling it. In this case, all the “internals”, including the gearbox, must be cleaned of dirt, dried grease and washed with clean gasoline. Next you will have to decide whether the bendix can be repaired or whether you will need to purchase a new one.

Checking the performance of Bendix directly on the car

This can be done without removing the starter. To do this, turn on any speed, press the brake pedal and turn on the starter. If the car just jerks forward, then everything is fine - most likely, your overrunning clutch is working. The sound of the armature rotating indicates that the bendix is ​​slipping, which needs to be repaired or replaced with a new one.

What to look for when choosing a battery

First of all, when determining which battery is best for a car, you should pay attention to the following initial data:

• in what climate zone the battery will operate;
• under what conditions the operation is planned;
• how often the car is used and with what load;
• compliance with energy consumption standards;
• presence of evidence confirming the declared quality.

For those drivers who like to install various devices on their car, when choosing, you should add some reserve to the parameters recommended by the specifications. For those who prefer to make do with the factory equipment of the car, it is enough to adhere to the parameters specified in the recommendations for servicing the car.

How to remove, clean, disassemble and what to lubricate?

Let's consider one of the simple but effective ways to clean the clutch: remove the starter from the vehicle; The removed part must be immersed in a container with gasoline for 2-3 hours. This will help clean it thoroughly from dirt; to clean the coupling grooves from deposits accumulated inside them, it is necessary to rotate its gear without removing the device from the container with gasoline; Now you can take out the device, and then thoroughly wash its body.

If such a measure does not give the desired result, it will be necessary to remove and disassemble the coupling. Let's look at how to change the Bendix on the starter: Open the hood and remove the minus terminal from the power source, thereby completely de-energizing the vehicle's on-board network. After which it is necessary to remove the power wires from the solenoid relay and the starter housing and begin dismantling it. Unscrew the fasteners that hold the element. Please note that to remove the element, you will most likely have to dismantle the adjacent parts. We assess the condition of the flywheel.

To replace the overrunning clutch, you will have to completely disassemble the starting device of the power unit. First, you should remove the cover, then remove the fastener from the traction relay winding and pull out the washer. We remove the fasteners, after which the engine starting device is disassembled into two halves. It happens that there is a ball inside it, it is advisable not to lose it. Since the starter is in a disassembled state, it is worth diagnosing all its components and, if they malfunction, replace them.

We dismantle the traction rod, the rubber insert and the retaining washer to gain access to the remaining small parts of the device. We release the protruding part of the bendix by prying it with a screwdriver, after which it is necessary to dismantle the lock washer or ring located on the shaft. We remove the worn out bendix and install a new element in its place. Litol is ideal as a lubricant. If it is missing, you can get by with motor oil. Everything is assembled in reverse order.

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Starter for viburnum 8 valves which is better

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for VAZ 2113-2115, 1117-1119 "Kalina" with 8-valve engine (reinforced gearbox)

Specifications:

Starter starting speed, rpm 2800 Crankshaft starting speed, rpm 200 Rated voltage, V 14.6 Rated power, kW 1.55

StartVOLT starters are superior to analogues in the number of successful engine starts and in reducing energy consumption by 30-50%!

Achieved by increasing the number of stator poles to 6 units: MAGNETIC5 technology

Unique design advantages of all StartVOLT starters:

Current collection brushes

• in current collection brushes, which are used in the starter, bronze-graphite is used as a material - a more durable and reliable material compared to graphite).

Gearbox

• the planetary mechanism is made entirely of metal (unlike analogues, which are made of plastic). • hardened steel with increased wear resistance is used, which directly affects the life of the starter. • the design of the planetary gearbox housing has been improved in order to reduce friction losses and improve the balancing of the gearbox-shaft pair.

Bendix

• heat-treated steel with increased wear resistance is used. • the overrunning clutch has an original design that ensures its increased wear resistance.

Solenoid relay

• by increasing the area of ​​copper contacts, the reliability of the relay increases and power losses are reduced.

The design of StartVOLT starters is patented by the Federal Service for Intellectual Property, Patents and Trademarks of the Russian Federation (“ROSPATENT”) Utility model patent No. 102691 dated November 15, 2010. Recommended retail price – 2,700 rubles.

Disassembling and reassembling the Bendix when repairing the starter

Repairing the starter with disassembling the bendix is ​​performed in the following order:

1. Before disassembling the bendix, first of all, it must be removed from the anchor ( see the video below).
2. Then very carefully flare the curved edge of the casing and remove it from the outer race.
3. After this, remove the springs and stretch them so that when free they increase by about 10 mm.
4. Next, you need to wash all the Bendix parts, the grooves of the outer race in gasoline and clean out the nicks and burrs on the working surfaces.
5. Do not forget to lubricate all structural elements with engine oil before assembly.

If you properly roll the edges of the casing, then such a starter repair will extend the life of the Bendix for several more years.

Cleaning nickels from carbon deposits on the solenoid relay

All this is best done on a removed part, which you can read about here. After this, you need to use a deep socket and a wrench to unscrew the three nuts securing the cover to the body, as is clearly shown in the photo below:

When all the nuts are unscrewed, you need to press on all the bolts from the same side and pull them out from the back:

Now carefully fold back the relay cover, but not all the way, as the wire will get in the way:

Pay attention to the central copper plate: it will definitely need to be cleaned of plaque and carbon deposits, if any. Also, you need to unscrew the nickels themselves (two in total) by unscrewing the two nuts on the outside of the cover: And then you can take them out from there with your hands, from the back side:

And then you can take them out from there with your hands, from the back side:

Diagnostics and replacement

During operation, the starter constantly receives serious loads, and is also very often exposed to various irritants (dirt, dust, oil, moisture). All this leads to rapid destruction of the insulating coating of the electric motor and to drive failures.

Among other causes of breakdown and failure, the main one is slipping of the Bendix during free movement. This occurs because a certain amount of dirt gets into the grooves and rollers. The first sign is the noise of the armature when the starter is turned on, while the crankshaft is stationary. In such a situation, repairs cannot be avoided.

In order to diagnose the Bendix itself directly, you can do this in a car. You need to do this as follows:

1. We turn on the transmission;
2. Release the brake;
3. Start the starter.

Now you need to listen. If you hear a sound that characterizes the rotation of the armature, then this is a sign that the starter bendix is ​​slipping. This means that it immediately needs to be repaired or replaced with a new bendix.

Minor Bendix repairs:

• The starter is removed from the car;
• It is immersed in a prepared container with gasoline and remains there for several hours. This is done in order to wash and clean it from dirt;
• Without removing the product from the container, rotate the clutch gear several times, this will help to better clean the grooves;
• After that, it is taken out and washed.

If, as a result of such cleaning, you have not achieved the desired result, then you will have to remove the overrunning clutch and disassemble it.

Let's look at the disassembly and repair of the Bendix step by step:

1. First of all, I advise you to disconnect the car's starter. But before this, you must disconnect the negative terminal from the battery. After this, you need to disconnect one wiring from the solenoid relay, and unscrew the other using a wrench on the starter itself. The key set to “13” is most often used;
2. Now you need to unscrew all the fasteners that hold the starter. Each machine has its own fastening system. So be prepared for the fact that when dismantling the starter you will have to dismantle some more elements along the way;
3. Already at this stage it is easy to determine the condition of the flywheel;
4. In the event that you decide to change the bendix, you need to disassemble the starter. First of all, remove the cover fasteners, and then disconnect the fastening of the winding output to the solenoid relay. You can get a washer-bracket;
5. Then you need to remove the last fasteners and disassemble the starter in half. If we find a ball inside it, it is necessary to save it;
6. Advice: if you have already disassembled the starter, look at all its components, which also sometimes fail. Outdated parts can also be replaced;
   

   
   

7. If necessary, remove the solenoid relay, rubber insert and washer. Then we take out all the remaining small parts;
8. Next, using a screwdriver, we remove the ears of our Bendix;
9. In order to free yourself from the stopper, you need to lower the washer down, while using the same screwdriver. It happens that instead of a washer there is a locking ring. In this case, for convenience, you can use a hammer and wrench. Place the key on the stopper and knock it down with a hammer;
10. The retaining ring that remains can be pulled off the shaft by prying it off with a small screwdriver or a special puller;
11. Now all that remains is to remove the bendix and install a new part in its place;
12. To put everything back together, you need to do all the steps in reverse order.

Possible causes of failure

As mentioned above, gear rotation is only possible in the direction of rotation of the starter armature. If rotation in the opposite direction is possible, this is an obvious malfunction, that is, the bendix must be repaired or replaced. There may be several reasons for this:

• Reduction in the diameter of the working rollers in the cage due to natural wear. The way out is to select and purchase balls of a similar diameter. Some car enthusiasts use other metal objects, such as pieces of a drill, instead of balls. However, we still do not recommend doing it yourself, but buying balls of the required diameter.
• The presence on one side of the roller of flat surfaces formed due to natural wear. Repair recommendations are similar to the previous paragraph.
• Grinding the working surfaces of the driving or driven race in those places where they come into contact with the rollers. In this case, repair is hardly possible, since such excavation cannot be removed. That is, it is necessary to replace the bendix.

Note! It is often better to completely replace the bendix than to repair it. This is due to the fact that its individual parts wear out approximately equally. Therefore, if one part fails, the others will soon fail as well. Accordingly, the unit will have to be repaired again.

Another reason for failure is wear of the gear teeth. Since this happens for natural reasons, repair in this case is impossible. It is necessary to either replace the mentioned gear or the entire Bendix.

Since the starter not only experiences heavy loads, but also comes into contact with the external environment and is susceptible to irritants such as moisture, dust, dirt and oil, freewheeling can also occur due to deposits in its grooves and rollers. A sign of such a malfunction is the noise of the armature when the starter is started and the immobility of the crankshaft.

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How to remove bendix

First you need to dismantle the starting device itself, having first disconnected the positive terminal from the battery, and from the starter - the wire going to the solenoid relay. Removing the starting device (most often it is fixed with three bolts) is possible from the top or bottom (you will need an inspection hole) - it all depends on the make of the car. At the same time, inspect the flywheel teeth: if they are very worn, you will have to replace the ring gear or the entire flywheel. After the starter is on the workbench, dismantle (if necessary, here everything again depends on the model of the machine) the solenoid relay. Next comes the removal of the bendix:

• Unscrew the nuts securing the vertical studs (usually there are three of them) and, lightly tapping with a rubber mallet, separate the starter housing. Take this opportunity to visually assess the condition of the brushes and windings.
• Hook the bendix by the “ears” with a flat-head screwdriver and pull it out of the fork.
• Take a hammer and an open-end wrench that fits the diameter of the overrunning clutch shaft and remove the first retaining ring; the second can be moved with a flat-head screwdriver.
• Now we remove the starter bendix itself.

Removing the starter from under the hood

Before removing the starter

An inspection hole will be needed to remove the starter from under the hood, and then diagnose it outside the car. Anyone who does this for the first time will spend relatively a lot of time, so before starting dismantling, you can try to clean the starter contacts, which may have oxidized during operation, make sure that they are securely fastened, and perhaps also replace the power wires.

You need to check the entire electrical circuit, so you should make sure in advance that the problem does not lie in the battery. If these simple measures do not resolve the problem, the device must be removed.

If you do not know where the starter is located in your car, you can focus on the sound under the hood that appears when you turn the key - for this you will need the help of a second person who will be sitting in the car.

Extraction process

First of all, you need to disconnect the device from the battery - remove the terminals and conductive cables from the solenoid relay. After this, the fastening bolts are unscrewed, usually there are 2 or 3 of them - for this you will need a hinged extension.

It was already mentioned above that an inspection hole is necessary for this work, since sometimes in order to dismantle the starter it will be necessary to remove the components and mechanisms located on the way to it, in most cases the engine compartment protection trim.