If the clutch fails when the gear is engaged, then to disengage it, reset «gas» and put the gear lever in neutral position. If the transmission has sunk, then you can give a small «gas», to release the shift lever.
To drive with a faulty clutch, do the following:
- turn off the engine and engage first gear;
- turn on the starter and start the engine. The vehicle will jerk off until the engine speed matches the gear. If the engine is cold, then it should be warmed up beforehand so that it does not immediately stall. On a flat road, you can drive in second gear to the nearest service station;
- if you want to try to switch from a lower gear to a higher one, then move off, as described, in first gear, and then increase the engine speed to about 1000 rpm-1. Release the pedal a little «gas» and shift into neutral. Then fully release the pedal «gas» and engage second gear. When the speed of the engine crankshaft and the gearbox shaft are aligned, the second gear will turn on. If there was a lot of time to switch gears, then add «gas», while switching on transmission. Downshifting to a higher gear should only be done at low speeds, thus shifting, for example, into second gear at about 20 km/h, into third gear at about 25 km/h and into fourth gear at about 35 km/h. Shifting into fifth gear is most likely not required;
- when downshifting, the engine speed must be increased to enable the next gear to be engaged. Release the pedal a little «gas» and shift into neutral, and then again «step up the gas», while moving the shift lever to the low gear position.
The transmission should turn on without any problems. When downshifting, you should also slow down in order to control the gear shift. If there is a rattle in the gearbox, check again if the gear is engaged. Thanks to the synchronizers, the gears should turn on without any problems, however, this will have to be done with some effort.
Possible clutch malfunctions, their causes and methods of elimination
Cause of malfunction | Elimination Method | |
Clutch jerk | ||
1. Defects in engine and gearbox mounts | 1. Check and, if necessary, replace | |
2. Gearbox hanger loosening | 2. Tighten the mounting bolts | |
3. Uneven pressure of pressure plate | 3. Replace pressure plate | |
4. Misalignment of the input shaft of the gearbox relative to the crankshaft | 4. Check engine and gearbox centering surfaces | |
Clutch slip (clutch «slips») | ||
1. Excessive wear of driven disc | 1. Replace the driven disk | |
2. Jamming of the piston of the working cylinder | 2. Replace slave cylinder | |
3. Weak diaphragm springs | 3. Replace pressure plate | |
4. Leakage of the working cylinder | 4. Visually inspect | |
5. Hardening or oiling of the driven disc lining | 5. Replace the driven disk | |
6. Clutch overheated | 6. Install original clutch parts | |
Does not turn on or turns on with difficulty (incomplete clutch disengagement - clutch «leads») | ||
1. Jamming of driven disk hub on input shaft (dry or dirty spline) | 1. Clean splines, remove burrs, nicks, corrosion and re-lubricate spline | |
2. Lateral runout of driven disc | 2. Check the driven disk, straighten it or replace it | |
3. The clutch pedal does not reach the stop when pressed (Increased clutch pedal free play) | 3. Adjust clutch pedal free play | |
4. Air ingress into hydraulic clutch system | 4. Remove air (pumping) from the hydraulic system | |
5. Destroyed parts of the driven disk | 5. Replace the driven disk | |
Unusual noises when pressing the clutch pedal | ||
1. Defective release bearing | 1. Check, replace release bearing | |
2. Runout of driven disc against pressure plate | 2. Replace the driven disk | |
Rise and fall noises during acceleration or deceleration or coasting | ||
1. Loosening clutch rivet joints | 1. Replace clutch | |
2. Big grip imbalance | 2. Replace the master and slave discs |
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