Audi 80/90/Coupe

since 1986-1991 of release

Repair and car operation



Audi 80/90/Coupe
+ 1.2. Car identification
+ 2. Engines, carburetors
3. Greasing system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Ignition system
- 8. Transmission
   8.1.2. A fork - the main cylinder of coupling
   8.1.3. Press coupling disk
   8.1.4. Malfunctions of coupling
   + 8.2. Mechanical transmission 012
   + 8.3. Mechanical transmission 01А
   + 8.4. Automatic transmission 089
   + 8.5. Automatic transmission 087
   8.6. Dismantling and assembly of automatic transmissions
   8.7. Block of valves
   + 8.8. Automatic transmission 097
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
+ 13. Central air
+ 14. Electric equipment







dfe5d7b3


8.1.4. Malfunctions of coupling

GENERAL INFORMATION

POSSIBLE REASON
ELIMINATION METHOD
The pedal of coupling does not come back to a starting position (on cars with a coupling hydraulic actuator)
Air hit in a hydraulic actuator, level of working liquid is lower than norm
Restore level of working liquid to normal, remove air from a hydraulic actuator.
Prikhvat of pistons in the main thing or the working cylinder
Replace faulty details, remove air from a hydraulic actuator.
Leakage of working liquid in the main thing or the working cylinder
The same (on cars with a mechanical drive of coupling)
Jamming of a cable of a drive of coupling. The self-regulation mechanism (is faulty at its existence)
Replace a cable.
The same (all cars)
The returnable spring (is faulty at its existence)
Replace a returnable spring.
Jamming of a pedal of coupling
To clear and grease a pedal axis. If necessary to replace the plug.
Jamming of a fork of switching off of coupling on a coupling case
To clear sharnirny knot of a fork. To execute necessary repair.
Slipaniye or the raised friction between details in a coupling basket
To clear and grease sliding places. To execute necessary repair.
Raised люфт the bearing of switching off of coupling on the directing plug, прихват the bearing
To replace directing plug and the bearing of switching off of coupling.
Breakage of a diafragmenny spring of a press disk
To replace a press disk assembled.
Too "rigid" pedal of coupling (on cars with a mechanical drive of coupling)
Jamming of a cable of a drive of coupling. Cable corrosion in a cover. The self-regulation mechanism (is faulty at its existence)
To replace a drive cable.
Jamming of a fork of switching off of coupling on a coupling case
To clear and grease sharnirny connection. To replace the plug.
The same (on cars with mechanical transmission, only for transmission 020)
Slipaniye or the raised friction between a pusher and a press disk
To grease contact surfaces with a thin layer of G 000 100 greasing. To grease with a thin layer a pusher.
The same (all cars)
Jamming of a pedal of coupling. (Before check disconnect a pusher of the main cylinder or a drive cable from a pedal)
To clear and grease sharnirny connections. To replace the plug.
Jamming of a peripheral spring. Defect of a peripheral spring
To clear and grease sharnirny connections. To replace a spring.
The increased elasticity of a returnable spring (at existence). The improper returnable spring is established
To establish a returnable spring of the necessary type.
Increase of the effort necessary for switching off of coupling because of wear of frictional slips
Inform the customer: the effort of switching off of coupling increases at increase in wear.
Slipaniye or the raised friction between details in a coupling basket
If the distance from heads of rivets to a surface of a slip exceeds 0,1 mm, replace a conducted disk of coupling.
Raised люфт the bearing of switching off of coupling on the directing plug, прихват the bearing
To clear and grease interfaced details. Worn-out directing plugs to replace.
Wear of contact surfaces of the bearing of switching off of coupling and fork of switching off of coupling
To replace worn-out details.
On a press disk improper springs are established
To establish springs with the corresponding number according to the catalog.
Jamming of a nave of a conducted disk of coupling on shlitsa of primary shaft of a check point
To check existence of defects on a nave of a disk and shlitsa of a shaft (задиров). If necessary conducted disk to replace. To clear shlitsa of a nave and a shlitsa of primary shaft of corrosion and the greasing remains. To grease with a thin layer of G 000 100 greasing of a shlitsa of primary shaft. Remove excess of greasing, moving a conducted disk on shlitsa of primary shaft in both parties.
The increased noise at coupling switching off (on cars with a mechanical drive of coupling)
Noise of transmission get to salon through a cable of a drive of coupling
To replace antinoise details of a body, or to strengthen them additional antinoise protection.
Jamming of a cable of a drive of coupling (a zalipaniye, the raised friction, a raspleteniye)
To replace a drive cable.
At completely squeezed out pedal of coupling the diafragmenny spring of a press disk touches a conducted disk of coupling (a free wheeling of a pedal of coupling less norm)
To adjust a free wheeling of a pedal of coupling.
The self-regulation mechanism (is faulty at its existence)
To replace a drive cable.
Greasing of rubbing surfaces of a press disk of coupling and diafragmenny spring is necessary
To grease contact surfaces with a thin layer of G 000 100 greasing. Worn-out details to replace.
The same (on cars with mechanical transmission, only for transmission 020)
It is necessary to grease rubbing surfaces, a pusher and press a coupling disk
To grease rubbing surfaces with a thin layer of G 000 100 greasing.
The same (on all cars)
Jamming of a pedal of coupling, the pedal axis is bent
To clear and grease a pedal axis. If necessary to replace the plug.
Jamming of an axis of a peripheral spring because of the raised friction, coaxiality violation
To clear and grease an axis.
The increased noise from a returnable spring (if it is provided by a design)
To grease a spring axis.
Defect of the bearing of switching off of coupling or bearing holder, wear of a contact surface (buckling)
It is usually eliminated with bearing replacement. To replace the damaged directing plugs.
Defect of contact surfaces of a press disk (bend or breakage of edges of petals of a diafragmenny press spring). Violation of centering of the bearing of switching off of coupling
To replace press a disk. To check a condition of the bearing of switching off of coupling and a bearing holder. If necessary replace. To check a condition of aligning plugs.
Wear of the directing bearing of the crankshaft (if is available), not coaxiality of installation of the engine and a check point
To replace the bearing, to put greasing on the basis of a molybdenum disulfide. To check a condition of the aligning plug.
The wrong installation of a conducted disk of coupling
To establish a conducted disk correctly.
The conducted disk which type does not correspond to this coupling is established
To establish a disk of the necessary type.
The gnash at transfer or backing inclusion, jams the gear shifting mechanism, gear shifting is impossible, coupling does not work (at cars with a coupling hydraulic actuator)
Fall of level of working liquid. Air hit in a hydraulic actuator. Leakage of liquid from the working or main cylinder, elasticity of walls of a tube of a hydraulic actuator. Wrong adjustment of a fork of switching off of coupling
To check a hydraulic actuator. To restore level of working liquid, to pump over a hydraulic actuator. To replace faulty details. To restore level of working liquid, to pump over a hydraulic actuator. It is correctly to adjust.
The same (on cars with a mechanical drive of coupling)
Not coaxiality of details
To replace faulty details.
The free wheeling of a pedal exceeds norm
To check a free wheeling of a pedal, if necessary to adjust.
The cable of a drive which is not corresponding to this coupling (the increased length) is established
To establish a cable of a drive of the necessary type.
Jamming of a cable of a drive
To replace a cable.
The self-regulation mechanism (if is available) is faulty
The same (on cars with mechanical transmission, only for transmission 020)
Excessive reduction of length of a pusher owing to wear
To replace a pusher, to check the bearing of switching off of coupling. On contact places of a pusher and the bearing to apply a thin film G 000 100 greasings.
The same for all cars
Insufficient course of a pedal of coupling (stirs a rug or a covering under a pedal). Coupling completely is not squeezed out
Inform the customer.
The gnash is caused only by gearing of a gear wheel of a backing
Inform the customer. Before inclusion of a backing to squeeze out a pedal of coupling and to wait for 3-6 seconds depending on diameter of a conducted disk. At first should stop primary shaft of a check point with a conducted disk.
Wrong adjustment of the mechanism of gear shifting
To check, if necessary to adjust.
Greasing of a support of the lever of gear shifting is necessary. Violation of the correct landing of details of the mechanism of gear shifting
To grease the gear shifting mechanism, to replace faulty details.
Zalipaniye or the raised friction of a conducted disk of coupling on shlitsa of primary shaft. Corrosion of a nave of a conducted disk or damage at installation. Violation of centering of a nave of a conducted disk
To check shlitsa of a nave on absence of the destructions, if necessary conducted disk to replace. To remove corrosion and the greasing remains from a nave and with шлицов primary shaft. On a shlitsa of primary shaft to put very thin layer of G 000 100 greasing. To remove excess of greasing by disk moving on primary shaft in both parties. If the nave is not aligned, check position of aligning plugs. Check a condition of the bearing of switching off of coupling, a holder of the bearing, a press disk and directing bearing of the crankshaft. If necessary to replace.
Too small vystupaniye of a press disk (the disk of improper type is established)
To replace press a disk.
Defect of the directing bearing of the crankshaft. Primary shaft of a check point rotates at the switched-off coupling
To replace directing bearing, to put greasing on the basis of a molybdenum disulfide. To check a condition of aligning plugs. If necessary to replace. To check a condition of primary shaft of a check point.
Violation of mutual centering of the engine and check point (there are no aligning plugs), because of which ring of a conducted disk sdeformirovano
Before check point installation to establish aligning plugs. To check a condition of a conducted disk, a press disk and directing bearing (if is available). If necessary to replace.
Defect of the directing bearing of the crankshaft
Wear of frictional slips because of transfer inclusion on the raised turns, i.e. switching on a low gear at a high speed of movement
To replace a conducted disk, to inform the customer.
Wear of frictional slips because of deliberate pro-slipping by coupling at dispersal
Defect of synchronizers and / or gear shifting mechanism
To repair a check point.

Wrong installation of a press disk. Deformation of a conducted disk because of the wrong driving
To check a condition of details. If necessary to replace. Check the provision of adjusting hairpins. If after this replacement the gnash does not vanish, check a condition шлицов on a nave of a conducted disk and freedom of a provorachivaniye of primary shaft of a check point, to check a condition of the directing bearing (if is available) crankshaft, to repair a check point.
The gnash is distributed on the 2nd transfer, and only at cold transmission
Inform the customer. If necessary replace oil in a check point, having filled in oil with bigger viscosity.
The increased thickness of a conducted disk
To replace a conducted disk.
Sticking of a conducted disk to a flywheel owing to corrosion (the car a long time was not maintained, high relative humidity)
Slightly to smooth out adjacent surfaces. At strong corrosion to replace details.
Coupling slips (cars with a coupling hydraulic actuator)
The piston of the main thing or the working cylinder does not come back to a starting position
To replace the main or working cylinder. To replace working liquid, to pump over a hydraulic actuator.
The same (cars with a mechanical drive of coupling)
Wrong adjustment of a cable of a drive (insufficient free wheeling of a cable)
To adjust a cable. If necessary to replace with a cable of the necessary type.
The self-regulation mechanism (is faulty at its existence)
If necessary to replace a cable.
Cable jamming
If necessary to replace a cable.
The same (on cars with mechanical transmission, only for transmission 020)
Leak of an epiploon of a pusher of switching off of coupling on primary to a shaft
To replace an epiploon, a conducted disk. To clear press a disk and a flywheel.
The same (all cars)
Are established conducted and press a disk of inappropriate type
To replace with disks of the necessary type.
Wear of a conducted disk, burning out of a press disk, formation of furrows owing to an overheat, deformation of a press disk because of the wrong installation, weak effort of a press disk. The wrong driving at normal wear
To replace conducted and press disks. To inform the customer.
The raised friction of details of transmission, zalipany drafts of a pedal
To clear and grease sharnirny connections, if necessary to repair.
Zamaslivaniye of coupling and flywheel disks. Wear of an epiploon of the crankshaft. Greasing hit on rubbing surfaces because of excessive greasing of a nave of a conducted disk
To replace a conducted disk. To clear contact surfaces of a press disk and a flywheel. To replace a crankshaft epiploon, to remove excess of greasing from primary shaft.
The wrong installation of a conducted disk
To establish a disk correctly. To check a condition of a conducted disk. If necessary to replace.
Coupling "conducts", breakthroughs at in a start of motion (cars with a coupling hydraulic actuator)
Wrong adjustment of coupling
It is correctly to adjust.
Air hit in a hydraulic actuator, defects in the main and working cylinders
To replace faulty details. To check level of working liquid, to pump over a hydraulic actuator, to check existence of leaks.
The pusher of the main thing or the working cylinder does not come back to a starting position
To replace faulty details. If necessary to replace working liquid. To pump over a hydraulic actuator.
The same (cars with a mechanical drive of coupling)
Cable jamming
To replace a cable.
Pedal jamming. (Before check to disconnect a cable from a pedal.)
To clear and if necessary to grease sharnirny connections. If necessary to replace the plug.
Jamming or the raised friction of a fork of switching off of coupling
To clear and grease sharnirny connections. If necessary to replace the plug.
The same (all cars)
Unstable operation of the engine
Check engine adjustment, eliminate the reason.
Errors of driving: too small turns at dispersal
Inform the client.
The conducted disk of inappropriate type is established
To replace a disk.
Noise idling (only for transmission 020)
Zamaslivaniye of a conducted disk, contact surfaces of a press disk and a flywheel (oil infiltration from a coupling basket is observed)
To check an epiploon of a pusher of switching off of coupling, if necessary to replace. To replace a conducted disk, to clear press a disk and a flywheel.
The same (for all cars)
Breakage of dempfiruyushchy springs
To replace a conducted disk.
On a conducted disk there is no dempfiruyushchy plate (the increased noise idling)
To establish a dempfiruyushchy plate.
Deformation, breakage or ovality of a press disk
To replace press a disk.

Unstable operation of the engine
Check engine adjustments, eliminate the reason.
Violation of the correct position of the engine because of softness of details of its suspension bracket
Check engine mount details. If necessary replace.
Shock-absorbers are faulty
To replace shock-absorbers.
Zamaslivaniye of frictional overlays of a conducted disk, contact surfaces of a press disk and a flywheel
Establish the reason of hit of oil. If necessary execute repair. To replace a conducted disk. To clear press a disk and a flywheel.
Raised люфт the bearing of switching off of coupling on the directing plug (non-uniform distribution of the effort operating on a diafragmenny spring of a press disk)
To replace the bearing and directing plug. To check a condition of details and sharnirny connections.
Non-uniform work of a press diafragmenny spring because of raised люфта the bearing of switching off of the coupling causing non-uniform distribution of effort on a contour of a diaphragm
To check a surface of a prileganiye of frictional overlays of a conducted disk to a basic surface of a flywheel and a condition of a diafragmenny spring. If necessary to replace press a disk. To replace the bearing and directing plug.
Deformation of a basket of coupling in the course of assembly therefore the correct provision of a press disk is broken
To clear a flywheel and press a disk of greasing. At detection of serious destructions (задиров, traces of an overheat, grooves) to replace. To remove greasing from a nave and with шлицов primary shaft. To apply a thin film greasings G000 100 on a shlitsa of primary shaft. To remove excess of greasing by moving of a conducted disk on primary shaft in both parties.