What are the possible causes of clutch slippage?

1) The friction plate is broken.

The friction plates should be replaced with new ones.

2) The free stroke of the pedal is too small.

If the free stroke of the pedal is too small, it may cause the free gap between the release lever and the release bearing to disappear, and the release bearing is close to the end face of the release lever, so that the clutch is often in a semi-engaged state and slips during work. In addition, it will also cause abnormal wear between the pressure plate and the friction plate, so that the free travel of the pedal will be further reduced, forming a vicious circle. If it is found that the pedal stroke is too small, it should be adjusted to the data specified in the instruction manual in time.

3) The end face of the separation lever is not on a flat surface.

The distance between the end face of the three release levers and the end face of the separation bearing is inconsistent, and when the deviation is too large, it will cause the clutch friction plate to be biased and eccentric to wear, and the total contact area between the friction plate and the pressure plate will be reduced, resulting in clutch slippage. In this case, the release lever must be readjusted so that the ends of the three release levers are on the same plane, and their deviation should be controlled within 0 2 mm, and the free clearance between the release lever and the release bearing is in accordance with the regulations.

4) There is oil stain on the working surface, and the friction coefficient decreases and slips.

The oil stain should be cleaned and the cause of the oil stain should be found out and eliminated.

5) The friction plate burns out.

A focal layer is formed on the surface of the friction plate, and the coefficient of friction decreases, causing the clutch to slip. If the burn is severe, the friction disc should be replaced.

6) Friction sheet wear.

Due to the normal wear and tear in long-term use, the friction plate becomes thinner, resulting in the pressure between the friction plate and the pressure plate decreasing and slipping. When it is severely worn, it will also expose the rivets, strain the working surface of the pressure plate, and aggravate the degree of slippage. When the wear is not large, it can be compensated by appropriately adjusting the free gap between the separation lever and the release bearing, and when the wear is severe, the new friction plate should be replaced.

7) Deformation of parts.

When parts such as driven plates, pressure plates and butterfly spring steel plates are deformed, the clutch slips will be caused if the friction plate and the pressure plate cannot be compressed normally or the actual contact area is reduced. When this happens, the deformed parts should be repaired or replaced in time.

8) The pressure spring is too soft or broken.

The pressure spring is too soft or broken so that the friction plate and the pressure plate can not be engaged under the specified pressure, the clutch is often in a semi-engaged state, the work produces slippage, and accelerates the wear of the friction plate, resulting in the aggravation of the slip fault, when this happens, the pressure spring should be replaced in time.

9) Separation bearing burned or stuck.

The clutch loses its ability to disengage and is often in a semi-engaged state, causing the clutch to slip. Release bearings should be repaired or replaced.

1. PhenomenonWhen the car starts, completely relax the clutch pedal, and still feel that the starting power is insufficient or difficult to start; When the car is driving, the speed does not increase with the increase of the engine speed, and the driving is weak; When the car is heavily loaded uphill and driving on muddy and soft roads, the skidding is more obvious, and in severe cases, it will emit a burning smell from the clutch.

2. The reason is that the clutch pedal has no free stroke or the free stroke is too small; The pressure plate spring is too soft or broken; The friction plate is too thin and hardened, and the rivet is exposed or the surface is stained with oil; The clutch cover is loose with the flywheel connection bolts; The axial movement of the separating bearing sleeve is not free.

3. Judgment and elimination of slippage.

Tighten the parking brake, put the gear lever in low gear, slowly relax the clutch pedal, and slowly increase the accelerator pedal, if the car does not move, the engine continues to run without turning off, indicating that the clutch is slipping. When the gear lever is put in gear, the parking brake is tightened, and the engine can be shaken with the hand crank, which also indicates that the clutch is slipping.

Check the free travel of the clutch pedal and adjust it if it does not meet the regulations.

If the free stroke is normal, the clutch bottom cover should be removed, and the clutch cover and flywheel connection bolts should be checked to see if the connecting bolts are loose, and whether there is oil stain thrown out of the outer edge of the friction plate. If there are more adjustment gaskets between the clutch cover and the flywheel, the gaskets can be reduced or removed as appropriate.

If the clutch is still slipping after the above inspection and elimination, the clutch can be removed and the condition of the friction plate can be checked first. Such as friction plates are hardened and too thin.

Inspection method: first pull the parking brake, hang the transmission on the second gear, step on the accelerator pedal, and slowly engage the clutch, at this time, if the car can not move forward, and the engine does not turn off, this situation is regarded as clutch slippage.

Cause of failure and troubleshooting:

1) The free stroke of the clutch pedal is too small, and the clutch rod nut can be adjusted to lengthen the effective length and increase the free stroke of the clutch pedal.

2) The clutch disc is stained with oil. When adding grease to the inner spline of the driven disc and the inner cavity of the separated bearing housing, care should be taken not to add too much. If the driven disc has been stained with oil, it should be removed in time.

3) After the clutch disc is worn, the separation lever is warped, and the warpage is greater than the free stroke. In the event of this malfunction, first adjust the free travel of the clutch pedal according to the regulations. If the wear is too large and the effective length of the tie rod cannot be adjusted, the driven disc should be replaced with a new one.

4) The amount of wear of the driven disc exceeds the design limit. When the total wear on both sides of the driven disc exceeds, it should be replaced with a new driven disc.

5) Improper driving operation, clutch overheating, driven disc burning, deterioration. It can be repaired or replaced with a new part according to the fault situation.

There are reasons such as clutch plate damage or loosening, mediation discomfort, etc.

If the clutch disc of the clutch is damaged, loose or deformed, it is easy to loosen the connection between the clutch cover and the flywheel, thereby reducing the pressure of the clutch and causing the clutch of the car to slip.

If there is oil stain on the clutch disc of the automobile clutch, the friction of the clutch will be reduced, and the automobile clutch will slip.

The clutch adjustment of the car is uncomfortable, so that the clutch pedal travel of the car is too small, so that when the owner releases the clutch pedal, the clutch of the car is still in working condition, which causes the clutch of the car to slip.

If there are impurities between the clutch release bearing casing and the conduit of the car, the clutch release bearing cannot be returned normally, and it will also cause the clutch to slip.

1. The free stroke of the clutch is too small, the release bearing is pressed on the inner end of the release lever, and the pressure plate is in a semi-separated state, which slips when transmitting power.

2. Improper operation of the driver. The uphill shift is not timely, and the engine is about to turn off before shifting into the low gear; In order to save fuel and take off the gear and turn off the ignition, when starting the engine again, first hang up the high gear, and then use the method of relaxing the clutch pedal to force the engine to start; The slip grinding of the clutch friction plate is aggravated.

3. The clutch pressure plate spring is broken, which greatly reduces the ability to transmit engine torque, resulting in slippage.

4. The clutch friction plate becomes thinner after wearing, the surface is hardened, and the rivet is exposed or stained with oil is also the reason for the clutch to slip.

5. Improper adjustment of the clutch release lever and loose bolts of the clutch and flywheel will also cause the clutch to slip.

6. The exhaust valve port of the button valve is blocked, and the compressed air in the booster cylinder cannot be completely discharged quickly, resulting in the semi-separation state of the clutch and slipping.

Clutch used correctly:

1. Correct posture of stepping on the clutch. When stepping on the clutch pedal, step on the clutch pedal with the sole of your foot, keep your heel close to the ground, and keep your knees slightly bent when the clutch is at its lowest point;

2. Step on the clutch to the lowest point. Avoid the clutch being in a disengaged state for a long time, and ensure that the clutch is completely disengaged and will not wear out;

3. Control the timing of clutching. When driving, don't loosen the clutch too quickly or deliberately increase the engine speed too high. This accelerates the loss of the clutch;

4. Shift gears only after fully pressing the clutch pedal;

5. When pressing the clutch pedal, the accelerator pedal should be released quickly;

6. Pay attention to the clutch operation to match the hand shift action. When the hand fails to shift smoothly, you should release the clutch first, then step on the clutch once, and then shift gears, do not force the gear shift, otherwise the gears of the transmission will be rubbed, resulting in cup loss;

7. Pay attention to the left foot should not always be placed on the clutch pedal when driving;

8. Note that when driving, no matter what happens, do not press the clutch pedal with your right foot.

When a clutch slip occurs, a correct analysis of the cause of the failure should be performed.

1) The cause of clutch slippage.

Excessive wear of the disc friction pads or exposed rivets;

The clutch pressure plate spring is too soft or broken;

The free stroke of the clutch pedal is too small;

There is oil stain on the friction plate of the driven disc or it is hardened by aging;

The clutch and flywheel engagement bolts are loose;

The clutch master cylinder return hole is blocked.

2) Troubleshooting sequence and parties.

Check the free stroke of the pedal, if it does not meet the standard value, it should be adjusted;

If the free stroke is normal, the clutch bottom cover should be removed, and the clutch cover and flywheel joint bolts should be checked to see if they are loose, and if they are loose, they should be tightened;

Check whether there is oil stain on the edge of the clutch friction plate, if there is oil stain, it should be removed and cleaned and dried with gasoline or alkaline water, and then find out the oil stain ** and remove it;

If it is found that the friction piece is seriously worn, the rivet is exposed, aged and hardened, burned and soaked in oil, etc., the new piece should be replaced, and the new friction plate should not be cracked or damaged, and the depth of the rivet should comply with the regulations;

Check the oil return hole of the clutch master cylinder, if the oil return hole is blocked, it should be dredged;

If the fault is still not eliminated after the above inspection, adjustment and repair, the clutch will be disassembled and the elasticity of the pressure plate spring will be checked. When the pressure plate spring is good, the length should be consistent, if it is uneven, it should be replaced with a new product, if the elasticity is slightly reduced, the length difference is not large, you can add or subtract the gasket under the spring to adjust.

The reasons for clutch slippage are:

The clutch pedal does not have a free stroke, which makes the release bearing press against the release lever.

The friction plate, pressure plate or flywheel working surface of the driven disc is seriously worn, the clutch cover is loosely connected with the flywheel, the pressure spring is fatigued or broken, and the diaphragm spring is fatigued or cracked, so that the compression force decreases.

The friction plate of the driven disc is oily, ablative collapse, surface hardening, exposed rivets, and uneven surface, so that the friction coefficient is increased.

Decline. The clutch lever system is stuck, and the oil and dust between the separation bearing sleeve and the conduit are serious, and even cause stagnation, so that the separation bearing cannot be reset.

The separation lever is bent and deformed, and there is movement interference, and it cannot be reset.

The solution to the slippage of the clutch plates:

1. The friction plate is burned, hardened, oily or the friction plate of the driven disc is too thin, and it shall be repaired or replaced as appropriate.

2. The diaphragm spring is fatigued, cracked or fails, and should be replaced; The moving hairpin of the separating bearing and the rock separating sleeve cannot be returned and should be lubricated or replaced.

3. The pressure plate or flywheel is deformed and worn, and should be smoothed or replaced; The clutch control mechanism is not properly adjusted, resulting in too small free travel of the pedal, which should be adjusted.

4. For the use of mechanical cable control mechanism, it may be that the cable is stuck and the self-adjusting device fails, etc., so it should be lubricated and replaced according to the situation; The clutch master cylinder in the hydraulic control mechanism of the clutch is defective and should be overhauled or replaced.

Clutch pedaling.

Clutch stepping formula: heel, to hit the ground, first release quickly, stop for a few seconds, and then slow down, the upper part of the foot is placed on the pedal; Semi-linkage, not difficult to find, the vehicle is shaking, the engine is ringing, and the soles of the feet are pressed to the point; Lift the clutch, to be flexible, different cars are different; The clutch is high, it can be lifted quickly, and the clutch is low, and it must be lifted slowly; When stepping on the clutch, you need to remember to step on the end every time you shift gears.

The correct way to pedal the clutch is to use the left heel as the fulcrum and use the forefoot to press the clutch pedal. First of all, the clutch should be stepped on to the end, hung into the corresponding wide gear, with a light step on the throttle, and at the same time quickly lift the clutch to the semi-linkage position, after feeling the stability of the Lilingxiang combinator, you can completely let go of the clutch.

Clutch slippage.

When the car starts in low gear, after relaxing the clutch pedal, the car cannot start or has difficulty starting; When the car accelerates, the speed of the car cannot be increased with the increase of engine speed, and the driving is weak, and the phenomenon of burnt smell or smoke in serious cases is the phenomenon of clutch slippage.

Clutch slippage fault symptoms:

Lack of power when starting or going uphill with heavy loads.

The engine accelerates weakly while driving. When it is severely slipped, the clutch friction plate smokes, has a burnt smell, and even burns out the friction plate.

Clutch slippage fault cause 1:

The clutch pedal free travel is too small or none.

Changes in the surface properties of friction plates, such as oil stains, ablation, hardening, cracking, exposed rivets, etc.

The clutch compression spring weakens or breaks, causing the lack of compression force to cause slippage.

The pressure plate is worn too thinly and the compression spring is too elongated.

The warping of the main and driven discs makes the contact poor.

Clutch slippage reason 2

1) The clutch pedal does not have a free stroke, which makes the release bearing press against the release lever.

2) The friction plate, pressure plate or flywheel working surface of the driven disc is seriously worn, and the connection between the clutch cover and the flywheel is loose, so that the compression force is weakened.

3) The friction plate of the driven disc is oily, ablative, surface hardening, the rivet is exposed, and the surface is uneven, so that the friction coefficient is made.

Decline. 4) Pressure spring fatigue or reentry banquet breakage, diaphragm spring fatigue or cracking, so that the compression force regrets and falls.

5) The clutch lever system is jammed, and the oil and dust between the separation bearing sleeve and the conduit are serious, and even cause stagnation, so that the separation bearing can not be returned.

6) The separation lever is bent and deformed, and there is movement interference, and it cannot be returned.

Clutch slip fault diagnosis method:

Start the vehicle and tighten the parking brake.

Hang on low gear to make the vehicle start normally, if the body does not move and the engine does not turn off, it means that the clutch is slipping.

Without starting the vehicle, put on low gear, tighten the parking brake, and shake the engine with the handle without pressing the clutch pedal, if it can be shaken, it means that the clutch is slipping.

Clutch slippage diagnosis and exclusion.

1) Check the free stroke of the silver plate before the clutch is leaked, and adjust it if it does not meet the regulations.

2) If the free stroke is normal, the transmission should be removed.

shell, check whether the clutch and flywheel connection bolts are loose, and if they are loose, tighten them.