Crosser M8 does not turn off the clutch. Possible clutch malfunctions and ways to eliminate them
Incorrect adjustment, excessive wear Clutch elements can lead to the failure of the entire node. Consider what is meant when they say "clutch", as well as in what cases the malfunction can be eliminated with their own hands.
A little about the device
It is difficult to understand the cause of the fault, if you do not have a minimum idea of \u200b\u200bthe device and the principle of clutch operation. It suffices to understand that pressing the pedal provokes the movement of the fork and the release bearing. Pressed fork, pressed on the petals of the diaphragm spring, pushing the pressure disk from the slave disk. The latter, in turn, moves away from the flywheel, thereby terminating the transfer of torque from crankshaft to the primary shaft of the checkpoint. 
The shutdown drive can be mechanical or hydraulic. In the first case, the pedal and the shutdown plug are connected by a cable drive. The second type of inclusion assumes the presence of the main clutch cylinder. Pressing the pedal, you initiate the movement of the rod, which presses on the piscoveries inside the clutch cylinder. The displaced brake fluid, moving to the highway, presses on the piscoveries inside the working cylinder. Piston, moving, clicks on the shutdown rod.
What does "leads"
It is said that the coupling leads if the clutch is completely turned off. In other words, after pressing the pedal, the slave disk and the engine flywheel is not discredited completely, which leads to partial transmission of torque to the primary shaft of the gearbox.
Symptoms
It is possible to assume that the clutch can be carried out by one symptom - difficult to turn on and off the gear. Most often, the problems begin with the inclusion of reversed and first gears. Under the concept of "difficult" is understood as the need for a greater effort on the handle of the CAT and the inclusion with the crunch.
Difficult gear shift can be connected with a gearbox fault, which should also be taken into account when diagnosing.
The reasons
Repair with your own hands
If you have a clutch on your car, the first thing you need to check the size of the free stroke of the pedal. Usually this parameter does not exceed several millimeters. The configuration process is to displaced the adjusting nut and does not require special locksmith skills. The exact value, as well as the process of adjustment is described in the instruction manual and repair your car. We also recommend reading the article on how to adjust the free move of the clutch pedal with their own hands.
If, after adjusting the problem with the inclusion of gear, it is not disappeared, you must disconnect the gearbox and fully diagnose the clutch mechanism. Replacement clutch call to be easy operation, but with due theoretical preparation and availability required tool You can do it with your own hands.
It burns quickly and will have to change it! This agreary truth is often violated by newbies. And not because it is forgotten, but because to drive a car, half-grazing the coupling, more convenient and easier. Therefore, very many motorists of the clutch malfunction were the cause of the first repair of the first in the life of the car. Checking the clutch should be made before each car departure in driving schools, and the diagnostics generated often indicates the need for repair. As a rule, this is due to the change of friction disks.
A little about the device and destination
The clutch is the main mechanism of the transmission of the car, allowing us, without stopping the engine, to get sided into the place and change the intensity of the movement, switching to the transmission.
On the passenger cars Mounted primarily single-sized friction clutches with hydraulic drive.
The mechanism placed out and inside the housing basket attached to the flywheel bolts consists of the following details:
- flywheel;
- slave and drive discs with friction linings;
- springs pressed to the flywheel drive disk;
- frosting levers;
- push clutch;
- release bearing;
- shaft pedals and clutch pedals.
Diagnosis of characteristic basic faults
In order to switch the gears in the gearbox when the speed set or, on the contrary, when it decreases, every time crankshaft The engine is disarmed and again in contact with the power transmission of the car. It happens very often, and over time, signs of clutch wear begin to manifest itself in the nature of the car behavior on the road while driving.
Signs of clutch malfunction are divided into two main groups. The first is when it does not completely turn off, "leads." The second, on the contrary, when not fully turns on, or, as they say, "dropping".
Does not turn off ("leads") clutch
When, when you click on the pedal, the disks do not diverge completely, they say: "leads" the clutch. That is, discs remain in some contact, and it does not take full off. Experienced drivers They know how to check the clutch on incomplete shutdown. Diagnosis is simple. If the first transmission is switched on to the end of the pedal, the first transmission is turned on easily and without extraneous noise. If the inclusion occurs with difficulty and accompanied by noise gears - "leads." 
Causes may be:
a) Mechanical
- the lining of the slave disk was broken or loose rivets on them;
- reduction of the total pedal stroke (tight grip);
- the slave disk was swamped and its end beyond exceeds 0.5 mm;
- potted or swamped pressure disk;
- hences the hub of the slave disk on the slots primary Vala in gearbox;
- rivets attachment of the pressure spring global;
- the irregularities were formed on the surface of the closed disk friction linings.
b) Hydraulic Related
- leakage of fluid from the hydraulic system;
- air got into the system.
Elimination mechanical reasons It is associated with drive adjustment, cleaning and lubrication of slots, editing or replacement of the slave disk and, most often, the replacement of friction linings. Any clutch once has to change. Moting in the hydraulic system involve pumping to remove the air, checking the density of the compounds and integrity of the pipeline. If necessary, you will have to change the details failed, somehow: the main and working cylinder during the leakage of them of the liquid. 
Does not turn on ("dropping")
When during the movement, you start to hear the smell of Gary, and on the lifting your car significantly reduces the speed and generally began to accelerate worse - even the diagnosis is not needed: the clutch is running. This means that the slave and the leading discs when the clutch is turned on, is not tight enough.
There is a simple way to check the clutch. To do this, put the car on the parking brake and start the engine. Looking on the coupling, turn on the transmission. Smoothly press the gas pedal, and also smoothly release the coupling. The engine must stall. If he continues to work - it means that the clutch is dropped.
Reasons for incomplete inclusion:
- there is no free pedal stroke;
- friction lining of the slave disk were burned or worn;
- on friction overlays, on the surface of the pressure disk and the flywheel fell or oil continues to fall.
These reasons are also eliminated by the drive adjustment, the replacement of the lining. The oil that fell on the rubbing surfaces, as a result of which the slipping clutch occurs, it is necessary to remove, thoroughly flushing the contaminated areas of the White alcohol. Of course, it is necessary to find out and eliminate the reason for his appearance.
Diagnosis of other faults and their symptoms
Out-of-country noises are also indicated about the malfunction in the mechanism. So elevated level Noise When it is turned off, talks about leakage of lubrication or wear of the clutch shutdown bearing. Better to change it.
The noise that occurs when the clutch pedal is released, indicates a breakdown or loss of elasticity of the damper springs, the springs of the plug on or breakage of the plates that connect the pressure disk with the casing.
All listed clutch malfunctions can be identified using a simple diagnosis. Further detailed clutch check should suggest ways to eliminate them.
Grip - important element In the mechanism of the car movement. Its main tasks: to transfer the moment of movement from the engine to the wheels, a short-term break of this transmission during the pressed clutch pedal. From the quality of its work depends on the even start of the car, fuel consumption.
If the machine is new, it is especially important to pay attention to the state of the gearbox. The clutch drive must be checked by passing the first 2000 km. Adjust it if necessary. With the engine running, lift the clutch, listen, how the engine noise changes. Only at the same time the clutch position can be determined by the correctness of its disconnection. The emergence of new unusual sounds means faults in the shutdown bearing. The clutch shutdown bearing must be checked every 15,000 km of rumor.
Turn off the clutch, that is, press the pedal, you need to make the most smoothly, not to let go sharply. In general, all three stages are performed without jerks, gradually. Otherwise, the car twitches, and the engine can stumble. If the pedal has too free stroke, the clutch turns off not completely, it is necessary to adjust it. Check the level in the system brake fluid At least once a month, pressing the clutch pedal is useless in the absence of fluid.
One of the most responsible knots in the car is a clutch. It can be different typesBut performs a single function - the transmission of torque. The latter comes from the flywheel to the primary shaft of the PPC. The transmission with the engine is not constantly connected. To enable the desired speed, these aggregates need to be disconnected. With this function and copes the clutch mechanism. The node is very reliable, but over the years it causes some problems. Therefore, in today's article, we will consider possible clutch malfunctions and ways to eliminate them.
Device
This node consists of several elements:
- Baskets.
- Clutch disk (here includes a slave and lead element).
- Forks and working cylinder.
- Purpose disk.
- Damper springs.
Thanks to the latter, the transmission is protected from elevated loads. The disc itself not only transmits torque, but also smoothes it when contacting the flywheel.
How does it work?
Consider the principle of work on the example of a classic single-disc clutch. So, to turn it on, the driver presses the appropriate pedal. Efforts from pressing are transmitted to the working cylinder. Next rod pushes the plug. The latter affects the clutch mechanism itself. The bearing begins to press on the petals of the pressure disk, and they begged in the direction of the flywheel. So the box begins to work independently from the engine.
Motor runs fast. At this point, you can enable the appropriate gear. So that the engine re-convey the power on the checkpoint and the car continued the movement, the pedal is released. Under the action of the drive elements, the disc is in contact with the flywheel. What a smooth driver releases the pedal, the softer is transmitted by the rotational moment. And if at the speed of this rule can be neglected, then when attaching you need to try to make the pedal as smoothly smoothly. Below we will look at the main clutch faults and their elimination methods.
Incomplete shutdown
In the people, this problem is called "leading clutch". The cause of the malfunction can be in incorrectly displayed clutch shutdown drives. In this case, it needs to be adjusted in accordance with the factory parameters. On the domestic cars Often there are problems with the clutch pedal. It should be put out its free move and the problem will be solved.
Other clutch malfunctions arise. So, with an incomplete shutdown, a slave disk is breached. The manufacturer allows end beats no more than half a million. Otherwise, it should be replaced with a new one. When parsing the basket carefully examines the status of the disk. The latter should not have unevenness on friction linings and traces of burning.
IN rare cases The clutch malfunctions occur due to the wedge of the hub of the slave disk on the slot of the primary shaft of the checkpoint. How to decide this problem? It is necessary to clean the slots and cover them with a specialized lubricant (for example, LST-15). If the problem of the host clutch is not eliminated, you should replace the slave disk or the primary shaft assembly to the new one.
Air in the system
On most modern cars Used hydraulic drive clutch. As working fluid The braking "dot" of the third or fourth grade is used. What are the signs of a clutch fault? If the pedal is mild, and the level of fluid at a minimum should be pouring the system from the air and resume the level. How to pump a clutch? Find the hexagon valve on the operating cylinder. It is usually unscrewed by the "10" key. Pre-create pressure in the system by clicking on the pedal 5-7 times. Next, unscrew the valve - you will see how joining fluid comes out. Repeat the procedure until the air is completely left of the system.
Do not forget to maintain the fluid level in the tank - if it leaves, the air automatically "skeins" into the system and all work will have to repeat again. What if after pumping the pedal again became soft? In this case, you can state a malfunction of the oil cylinder rod. From under it, liquid can be frozen - the air seats are not excluded. You need to look for the place of depressurization and localize it. These can be anthers, hoses, or sealing parts in the main clutch cylinder.
Boxing clutch
Another common problem facing motorists. The reason may be in the penetration of oil on the friction lining of the disc. Because of this there will be an insufficient tap with flywheel and permanent smell of Gary. These are the main signs of a clutch malfunction that is dropped. The car is not able to move normally and continue moving - often jerks are possible during acceleration.
All this indicates the incomplete inclusion of clutch. Among other reasons for this malfunction, it is worth highlighting:
- Increased disk friction linings (we will talk about its resource a little later). Solves full replacement of the element. If oil fell on its surface (it will be visible according to characteristic stains), it is necessary to clean the White-spirit element or another degreaser. But this is possible only with the integrity of damper springs and a small wear of the linings themselves.
- Zoom of the compensation hole on the main clutch cylinder. Eliminated by cleaning (flushing) holes.
- Drive damage. It can be a deformed fork or a faulty working cylinder.
The car is twitching
It is not always the reason why candles, a taking engine, a contaminated filter or an incorrect mixture. Problems can be global. So, jerks occur due to the hub of the slave disk on the slots of the primary shaft or when the pressure disk is warned. Also, the car is twitching due to loosening rivets on the clutch mechanism. All faulty items need to be replaced (push and slave drive, and the gearbox is possible).
Noise when clutching
This problem is easy to recognize. But often she does not pay due attention. So, when you click on the pedal, the car stops publishing a characteristic rustle. But it costs her slightly, how this sound is renewed again. This suggests that the released clutch bearing has failed. Its malfunction can be associated with the lack of lubrication, the backlash of the closure or natural wear. The element is unintended and repairing is not subject to. The release bearing is changing entirely to the new one.
When buying it is worth making sure the presence of lubricants. Or rather in sufficient quantity, since unscrupulous producers simply do not report it inside. This is the main cause of premature bearing failure. But moisture also contributes to this. When crossing Brodov (if you have an SUV), you need to be attentive. Otherwise, water will fall into all clutch nodes, which will significantly reduce their resource.
If noise occurs when the clutch is turned on, then damplement springs failed or jumped up forks. In rare cases, it is a breakdown of plates, which is connected to a pressure disk with a casing.
Resource drive disc
How much is this element? Exact data Manufacturers do not indicate.
But as practice shows, the average resource of the drive disc from 100 to 150 thousand kilometers. Below we note several factors that significantly reduce its resource:
- Aggressive manner ride. Permanent movements increased turns With a sharp throwing pedal, the pedal is adversely reflected in the state of friction linings.
- Riding with cargo. This is especially true of commercial vehicles. For example, we take "Gazelle", which does not differ from the "Volgovsky" box. Such a disc is simply not intended for high loads. Even with a smooth release of the pedal, the frictional material will slip through the flywheel and from friction simply burn. The resource of such a disk is not 15 thousand kilometers. The same applies to the trailer. Do not heat the mechanisms badly - the clutch will suffer, the main cylinder and much more.
- Wrong towing. Do not pull the car, the mass of which is one and a half or more than the weight of your car. So you will quickly burn the drive disk.
So, we found out the main clutch malfunctions and their elimination methods.
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