Clutch - single disc, dry, with central diaphragm spring

Located in an aluminum crankcase structurally integrated with the gearbox and attached to the engine block

VAZ-21114 engine clutch

The clutch cover is connected with six bolts to the engine flywheel.

The flywheel has three pins that, when the clutch is installed, fit into the corresponding holes in the casing, centering it.

Three pairs of elastic steel plates connect the casing to the pressure (leading) disk.

The basket assembly is balanced on the stand, so the entire basket is replaced.

Replacement of the basket is necessary when the annular wear of the pressure spring petals to a depth of more than 0.8 mm, as well as when the surface of the pressure plate is heavily worn or the spring “settles”.

Clutch basket VAZ-21114

The driven disk with a spring vibration damper is located on the splines of the input shaft of the gearbox between the flywheel and the pressure plate.

The driven disk is replaced if it has axial runout in the area of ​​the friction linings, the rivet joints are loosened, and also if the rivet heads are recessed from the surface of the linings by less than 0.2 mm.

Clutch Drive

Clutch drive - cable, backlash-free with automatic cable length adjustment.

A plastic leash is screwed onto the threaded end of the cable, which is inserted into the clutch release fork lever.

During the operation of the car, the pads of the driven disk wear out, as a result of which the clutch release fork lever moves forward (along the direction of the car).

Since the cable is connected to the fork arm, the length of the cable must be increased when the pads wear to maintain normal clutch pedal travel.

The cable length is changed automatically by means of a regulator located in the upper end of the cable and connected to the clutch pedal.

Therefore, adjustment of the clutch cable is not provided during operation.

The automatic cable length adjustment mechanism consists of a plastic housing, into which a toothed cable tip is inserted, held in the housing by two spring-loaded clamps.

The mechanism also includes a spacer sleeve, put on a cable, one end of which enters the body of the mechanism.

Elements of the clutch mechanism

When you press the pedal, the spacer moves away from the cable sheath bracket and does not press on the mechanism locks.

In this case, the body of the mechanism is rigidly connected to the cable.

If the lining of the driven disk is not worn out, then when the pedal is released, the sleeve only touches the bracket and does not open the latches - the toothed tip of the cable does not move relative to the body.

As the pads wear, the clutch fork lever with the threaded end of the cable moves forward (in the direction of the vehicle), pulling the cable.

At the same time, the spacer sleeve, resting against the bracket, unclenches the spring-loaded latches, and the toothed tip of the cable extends out of the housing by the amount necessary to compensate for the wear of the linings.

Clutch cable with auto adjuster

The clutch pedal is mounted on an axle in the pedal assembly bracket.

Between the clutch release fork and the pressure spring petals, a clutch release bearing with casing assembly is installed.

The bearing housing is pressed against the fork legs with a spring clip.

The bearing moves freely along the guide sleeve mounted on the clutch housing.

When the clutch pedal is depressed, the cable acts on the clutch fork lever, which moves the bearing.

The bearing presses on the petals of the clutch basket pressure spring, while the pressure plate moves away from the flywheel, as a result of which the engine crankshaft and the gearbox input shaft can rotate independently.

Possible clutch failures and solutions

Possible clutch problems and solutions

- Cause of malfunction

Troubleshooting

Clutch is slipping

(when the accelerator pedal is pressed hard, the engine picks up speed, but the car hardly accelerates):

- Lubrication of the flywheel, pressure plate, friction linings of the driven disc

Carefully wash the oily surfaces with white spirit or gasoline and wipe them dry. Replace heavily oiled driven disc. Eliminate the cause of oiling (oil leakage through the engine or gearbox oil seals)

- Reducing the force of the diaphragm spring

Replace pressure plate assembly ("basket")

- Strong wear or burning of the friction linings of the driven disk

Replace driven disc

- Damage or jamming of the clutch drive

Remove the jam. Replace drive parts if necessary

Clutch drives (difficult to change forward gears, reverse gear engages with noise, gearbox is working):

- Incorrect adjustment of the clutch drive (full pedal travel is not enough)

Adjust the drive. Replace deformed clutch fork

- Clutch cable jamming

Lubricate the cable with engine oil. If this does not help (rope wires are loose, the sheath is damaged), replace the cable

- Weakening of rivets or breakage of friction linings, warping of the driven disk (end runout more than 0.5 mm)

Replace disc

- Strong and uneven wear, scuffing on the working surfaces of the flywheel or pressure plate

Replace the flywheel. If the surface of the pressure plate is damaged, replace the casing with the pressure plate assembly ("clutch basket")

- Jamming of the hub of the driven disk on the splines of the input shaft of the gearbox

Clean the slots from dirt, remove minor damage with a needle file.

If the splines are severely worn or damaged, replace the disc and/or the gearbox input shaft.

Before assembly, apply fresh SHRUS-4 grease to the splines

- Skewed or warped disc

Replace cover with pressure plate assembly ("clutch basket")

Jerks when starting off:

- Clutch cable jamming

Lubricate the cable with engine oil. If this does not help, replace the cable

- Jamming of the hub of the driven disk on the splines of the input shaft of the gearbox

Clean the splines from dirt, eliminate minor damage with a needle file. In case of significant wear or damage to the splines, replace the disc and / or the input shaft of the gearbox. Before assembly, apply fresh SHRUS-4 grease to the splines

- deformation of the driven disk

Replace driven disc

- Loose fastening of the friction linings of the driven disk, severe wear or cracks on the linings

Replace driven disc

- Loss of elasticity of the spring plates of the driven disk

Replace driven disc

- Significant settlement or breakage of the springs of the damper of torsional vibrations, wear of the windows under the springs

Replace driven disc

- Seizures on the working surfaces of the flywheel or pressure plate

Replace flywheel or clutch cover with pressure plate assembly ("clutch basket")

- Oiling the working surfaces of the friction linings of the driven disk

Rinse oily surfaces thoroughly with mineral spirits or gasoline and wipe them dry. Replace heavily oiled driven disc. Eliminate causes of oiling

Rattle, knock or noise when engaging the clutch:

- Significant settlement or breakage of the springs of the damper of torsional vibrations, wear of the windows under the springs

Replace driven disc

- deformation of the driven disk

Replace driven disc

- Loose fastening of the friction linings of the driven disk, severe wear or cracks on the linings

Replace driven disc

Increased noise when disengaging the clutch:

- Wear, damage or leakage of grease from the clutch release bearing

Replace bearing