Main clutch faults (VAZ-2109)

The type of clutch used is characterized by a high degree of reliability and durability, and low labor intensity in maintenance.

The following faults may occur due to improper use of the clutch pedal (constant contact of the driver's foot with the clutch pedal while driving, sudden release of the pedal or incomplete "squeezing" of it), long-term operation of the car with a disturbed pedal stroke or natural wear of parts or their damage during many years of operation of the car. In the latter case, the clutch is subject to repair at a service station.

Incomplete disengagement of the clutch (clutch "leads")

This malfunction makes it difficult to shift forward gears, and the reverse gear engages with noise. Causes of the malfunction and how to fix it:

• large free travel of the clutch release fork lever due to increased clearance between the clutch release bearing and the pressure spring petals (at the clutch with a servo mechanism). This results in an increase in the free travel of the clutch pedal (clutch release fork lever) and reducing the working stroke. Therefore, complete disengagement of the clutch discs does not occur. This cause of the malfunction is eliminated by adjusting the free travel of the clutch release fork lever, as indicated above;
• warping of the disks. This malfunction occurs when the clutch disks overheat due to their slippage. The end runout of the driven disk should not exceed 0.5 mm. If the runout is greater, the disk should be straightened or replaced. If the pressure plate is warped, it is replaced together with the clutch housing and pressure spring;
• jamming of the driven disk hub on the splines of the primary shaft. This malfunction may occur after prolonged or improper use of the car due to contamination or wear of the splines. In the first case, it is enough to clean the splines of the shaft and hub and coat them with LSC-15 or Litol-24 grease, in the second case, replace the worn parts;
• loosening of rivets or breakage of friction linings. It is necessary to re-rivet the friction linings using steel rivets. After flaring, the rivets should not have any breaks. The distance from the rivet to the surface of the friction lining should be at least 0.2 mm;
• insufficient clutch pedal travel. This malfunction occurs due to incorrect adjustment of the gapless drive, when the pedal travel is not enough to completely disengage the clutch discs. To eliminate the malfunction, it is necessary to correctly adjust the pedal travel within 125...130 mm;
• failure of the clutch drive cable due to damage to the cable or its sheath or other reasons causing the clutch drive to jam. It is necessary to determine the cause of the malfunction and replace damaged or worn parts.

Incomplete clutch engagement (clutch "slips")

Signs of this malfunction:

• insufficient acceleration of the car when pressing the throttle pedal sharply, loss of power is felt when driving uphill, fuel consumption increases, the engine overheats, a specific smell from the burning of the driven disk linings is felt. Causes of the malfunction and how to fix it: there is no free play of the clutch release fork lever. In this case, the constant impact of the clutch release bearing on the petals of the pressure spring with. force is possible, at which the driven disk will not be clamped with sufficient force, which will lead to its slipping. This cause of the malfunction is eliminated by adjusting the free play of the clutch release fork lever, as indicated above;
• the friction linings are worn out or burnt. In this case, it is necessary to re-rivet or replace the driven disk;
• the clutch discs are oily. This is possible when the gearbox seals are worn out. To replace them, you should contact a service station, as this involves completely disassembling the gearbox;
• sticking in the clutch release drive. This is possible if the cable or its sheath is damaged (fractures, abrasions) and is eliminated by replacing the cable with subsequent adjustment of the clutch drive.

The information is posted on the portal (VAZBOOK.RU)

Increased noise when disengaging the clutch

Causes of malfunction and ways to eliminate them:

• wear, damage to the clutch release bearing or leakage of lubricant from it. The malfunction is eliminated by replacing the bearing and other damaged parts.

Jerks when engaging the clutch

Causes of malfunction:

• jamming of the driven disk hub on the splines of the gearbox input shaft, oiling of the disks, jamming in the clutch drive, damage to the surface or warping of the pressure plate.

The methods for troubleshooting this problem are listed above.