Diagnostics of malfunctions of coupling. BMW the 5th E28/E34 series (from 1981 to 1993 of release)
Repair of BMW E28 and series E34 from 1981 to 1993
1. Cars of the BMW brand of 5-series
2. Engine
3. Cooling system
4. Power supply system
5. Ignition system
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
8.1. General information
8.2. Description and coupling check
8.3. Removal and installation of the main cylinder of coupling
8.4. Adjustment of a pedal of coupling
8.5. Check of work and replacement of the switch of coupling (where it is provided)
8.6. Removal and installation of the executive cylinder of coupling
8.7. Pumping of hydraulic system of coupling
8.8. Removal, survey and installation of components of coupling
8.9. Diagnostics of malfunctions of coupling
9. Manual box of gear shifting (RKPP) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and air conditioner
16. System of onboard electric equipment
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and operation receptions
21. System of onboard diagnostics - a principle of functioning and codes of malfunctions
 








8-9-diagnostika-neispravnostejj-scepleniya.html

8.9. Diagnostics of malfunctions of coupling

Symptom Possible reason
The pedal of coupling fails to a floor practically without resistance or with very insignificant resistance The main or executive cylinder (is faulty see. Head Coupling).
Leakages of hydraulic liquid in lines (take place see. Head Coupling).
Tightness of shtutserny connections of a hydraulic path (is broken see. Head Coupling).
Hydraulic liquid in the tank (came to an end see. Head Routine maintenance of the car).
If liquid traces in a boot of the main cylinder take place, the back epiploon of the main cylinder (is damaged see. Head Coupling).
The bearing or fork of switching off of coupling (is damaged vyzhimny see. Head Coupling).
On a cover of a boot of the main cylinder and around a pedal of coupling traces of hydraulic liquid take place The back epiploon of the main cylinder (is damaged see. Head Coupling).
Traces of liquid take place on the executive cylinder The epiploon of a plunzher of the executive cylinder (is damaged see. Head Coupling).
When squeezing a pedal of coupling the feeling of softness of a course takes place Air got to hydraulic system (see. Head Coupling).
There is no coupling switching off (it is impossible to choose transfer) Transmission (is faulty see. Head Manual box of gear shifting (RKPP)).
The coupling disk (is faulty see. Head Coupling).
The bearing and fork of switching off of coupling (are incorrectly assembled vyzhimny see. Head Coupling).
The disk of a basket of coupling (is faulty press see. Head Coupling).
Weakened bolts of fastening of a basket of coupling to a flywheel (see. Head Coupling).
Coupling revolves (turns of the engine raise without increase in speed of movement of the car) Frictional overlays of a conducted disk (are excessively worn-out see. Head Coupling).
Frictional overlays of a conducted disk are polluted by oil owing to leaks through a back epiploon of a cranked shaft (see. Head Coupling).
The diafragmenny spring (weakened see. Head Coupling).
Peregret a conducted disk of coupling (see. Head Coupling).
At inclusion of coupling there is a vibration Frictional overlays of a conducted disk are polluted by oil or greasing, заполированы to shine or scorched (see. Head Coupling).
Support of the power unit are worn-out, or weakened their fastening (see. Heads Engine and Manual box of gear shifting (RKPP)).
Shlitsa of primary shaft of a transmission or nave of a conducted disk (are worn-out see. Head Coupling).
The disk or flywheel (is deformed press see. Head Coupling).
Around coupling there are extraneous noise The fork of switching off of coupling (is incorrectly established see. Head Couplingеof ).
The coupling bearing (is faulty vyzhimny see. Head Coupling).
The coupling pedal after an otpuskaniye remains squeezed out to a floor The fork of switching off of coupling is jammed in a casing (see. Head Coupling).
The bearing or fork of switching off of coupling (is broken vyzhimny see. Head Coupling).
For squeezing of a pedal of coupling too big effort is required The fork of switching off of coupling (is jammed in a casing see. Head Coupling).
The disk (is faulty press see. Head Coupling).
The main or executive cylinders of coupling (are established not that standard size see. Head Coupling).


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8.8. Removal, survey and installation of components of coupling
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9. Manual box of gear shifting (RKPP) and automatic transmission (AT)