W203 since 2000 of release
Repair and operation of the car
+ Mercedes-Benz cars of class C (W-203)
+ Operation manual
+ Routine maintenance
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
- Automatic transmission
+ The automated box of gear shifting 716.6
- Automatic transmission 722.6
Search of malfunctions - the general information
Problems of the block of electronic control and the operating signals
Removal and the AT installation with the hydrotransformer
The AT electrohydraulic control unit (AT is established)
Dismantling and assembly of the electrohydraulic control unit
Dismantling and assembly of a plate of gear shifting
Case of transmission and hydrotransformer
Multidisk brakes of B2, B3 and gear wheel of blocking at "Parking"
Dismantling and assembly of a back hollow shaft with the back coupling of a free wheeling
Removal and installation of a multidisk brake B1 and oil pump
Dismantling and assembly of the oil pump
Dismantling and assembly of a multidisk brake of B1
Dismantling and assembly of a multidisk brake of B2
Dismantling and assembly of an output shaft with the central and back block of planetary gear wheels
Removal and installation of multidisk couplings K1, K2 and K3
Dismantling and assembly of coupling of K1
Dismantling and assembly of the leading shaft with coupling by K2 and the forward block of planetary gear wheels
Dismantling and assembly of coupling of K3
The blocking mechanism at "parking"
Removal and installation of the lever of the selector of gear shifting
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
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Automatic transmission 722.6
General informationSection of automatic transmission
Automatic transmission, in the course of start-off from the place, performs function of ordinary coupling, and during the movement performs work on gear shifting.
The AT main hubs are: torque converter, planetary reducer and hydraulic or electronic control system. Hydrodriving disk brakes and disk coupling are applied to transition to another transfer the relation in a planetary reducer.
The torque converter on the functions corresponds to hydraulic coupling. Its task includes implementation of coupling at start-off from the place and gear shifting.
The control system of transmission (known as system of electronic synchronous switching) is a component of the modified control system of the engine installed only on model with automatic transmission. The control system can work in the special safe mode into which passes at detection of any malfunction. At the same time operating modes of transmission are limited, and the car can be delivered under the own steam to repair shop. Upon transition of a control system to the safe mode on the control panel the control lamp lights up (address the Head the Operation manual). Analyzing information arriving from various sensors (not only the sensors directly related to transmission), the control system chooses optimum from the point of view of profitability, smoothness of the course, etc. a box operating mode. At a certain position of the gate of a throttle the control system can block the hydrotransformer in such a way that only the fourth and fifth transfers will join. It reaches considerable decrease in consumption of fuel.
The only regular procedure of service of a box is check of level of working liquid (address the Section Check of Level of Oil of Automatic Transmission). Regularly it is not necessary to change transmission liquid.
Near a radiator of the cooling system the cooler of transmission liquid is established.
There is no traditional switch of the Kick-Down mode. Inclusion of this mode is carried out directly by a control system of transmission after the information processing arriving from the sensor of provision of a butterfly valve.
There are several operating modes of transmission, each of which can be involved after moving of the selector to one of the following provisions: P, R, N, D, 1, 2, 3, 4 (address the Head the Operation manual).
The engine can be started only if the selector is in the provision of P or N. It is made to prevent the movement of the car in start attempt (if the selector is installed in one of other provisions). Analyzing information arriving from sensors, the control system resolves or forbids start of the engine. The locations of various relays are specified in the Head Onboard electric equipment.