Cause of malfunction
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Elimination Method |
Clutch slips (not fully turned on) When you press the accelerator pedal hard, the engine speeds up, but the car almost does not accelerate (this is especially noticeable when driving uphill); the smell of overheated friction linings can be felt; fuel consumption increases
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Incorrect adjustment of the clutch actuator (no pedal free play)
| Adjust drive (see Clutch) |
Lubrication of the flywheel, pressure plate, friction linings of the driven disc
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Rinse oily surfaces thoroughly with mineral spirits or gasoline and wipe them dry. Replace heavily oiled driven disc. Eliminate the cause of oiling (oil leakage through the engine and / or gearbox oil seal) |
Strong wear or burning of the friction linings of the driven disk
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Replace driven disc assembly |
Reduced diaphragm spring force
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Replace the pressure plate assembly with the casing («basket» clutch) |
Jamming of the hub of the driven disk on the splines of the input shaft of the gearbox
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Clean the slots from dirt, eliminate minor damage with a needle file. If the splines are severely worn or damaged, replace the disc and/or the transmission input shaft. Before assembly, apply Litol-24 or SHRUS-4 grease to the splines |
Clogged compensation hole of the clutch master cylinder
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Disassemble the master cylinder, wash and clean the parts. Replace its seals and hydraulic fluid |
The clutch master cylinder piston slowly returns to its original position due to swelling of the rubber cuffs
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Replace seals or cylinder assembly. Replace the clutch fluid if gasoline or other solvents are suspected |
Clutch Leads (not completely off)
Difficulty shifting forward gears, reverse gear engages with noise
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Incorrect adjustment of the clutch actuator (pedal full stroke is small, its free play is increased)
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Adjust drive (see Clutch) |
Air has entered the hydraulic system (pedal «soft»)
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Bleed the system, tighten the connections. In case of leakage from the master or slave cylinders, replace their cuffs or cylinder assemblies |
Deformed clutch release fork
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Replace plug |
Weakening of rivets or breakage of friction linings, warping of the driven disk (end runout more than 0.5 mm)
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Replace disc |
Strong and uneven wear, scuffing on the working surfaces of the flywheel or pressure plate
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Turn or replace the flywheel. If the surface of the pressure plate is damaged, replace the casing with the pressure plate as an assembly («basket» clutch) |
Skewed or warped pressure plate
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Replace cover with pressure plate assembly («basket» clutch) |
Jamming of the hub of the driven disk on the splines of the input shaft of the gearbox
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Clean the slots from dirt, eliminate minor damage with a needle file. If the splines are severely worn or damaged, replace the disc and/or the transmission input shaft. Before assembly, apply fresh grease Litol-24 or SHRUS-4 to the splines |
Loose rivets in the connecting plates of the clutch cover or diaphragm spring, breakage of the plates
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Replace cover with pressure plate assembly («basket» clutch) |
Stuck release bearing
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Replace bearing |
Clutch won't disengage (pedal «fails»)
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Severely deformed or broken clutch release fork
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Replace plug |
Air in the hydraulic drive system
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Bleed the system, tighten the connections. If the main or slave cylinders are leaking, replace the cylinder assemblies |
Clutch won't disengage
(pedal «fails»).
Briefly engage the clutch can only be sharply pressed on the pedal
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Strong wear, defects in the master cylinder mirror; dirt in the cylinder
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Replace cylinder |
Worn or defective master cylinder cuff
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Replace cylinder assembly |
Jerks when starting
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Jamming of the hub of the driven disk on the splines of the input shaft of the gearbox
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Clean the slots from dirt, eliminate minor damage with a needle file. If the splines are severely worn or damaged, replace the disc and/or the transmission input shaft. Before assembly, apply SHRUS-4 or Litol-24 grease to the splines |
Deformation of the driven disk
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Replace driven disk |
Loose fastening of the friction linings of the driven disk, severe wear or cracks on the linings
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Replace driven disk |
Loss of elasticity of the spring plates of the driven disk
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Replace driven disk |
Significant settlement or breakage of the springs of the damper of torsional vibrations, wear of windows under the springs
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Replace driven disk |
Seizures on the working surfaces of the flywheel or pressure plate
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Turn or replace flywheel or clutch cover with pressure plate assembly («basket» clutch) |
Rattling, knocking or noise when the clutch is engaged
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Significant settlement or breakage of the springs of the damper of torsional vibrations, wear of windows under the springs
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Replace driven disk |
Deformation of the driven disk
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Replace driven disk |
Loose fastening of the friction linings of the driven disk, severe wear or cracks on the linings
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Replace driven disk |
Random noise with clutch disengaged
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Release bearing wear or lack of lubrication
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Replace bearing |
Wear of the forward bearing of a primary shaft of a transmission (at the end of the crankshaft) or lack of lubrication
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Replace bearing |
Clutch pedal creak
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Plastic pedal bushings not lubricated
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Lubricate the bushings with Litol-24 or SHRUS-4 |
Badly worn plastic pedal bushings
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Replace the bushings, lubricate them with Litol-24 or SHRUS-4 before installation |
After releasing the clutch pedal
it does not return to its original position
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Air in the hydraulic drive system
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Bleed the system, tighten the connections |
Lost or broken clutch pedal and/or fork return spring
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Replace spring (springs)
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