Mercedes S-Class W-140

1991-1999 of release

Repair and operation of the car

Mercedes S-Class
+ Mercedes-Benz cars of the class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Gear shifting box
- Automatic transmission
   Search of malfunctions - the general information
   - Automatic transmission 722.5
      Removal, check of a state and installation of the converter of rotation (hydrotransformer)
      Removal and installation of the centrifugal regulator
      Removal and installation of the sensor switch of blocking of a starter (permission of start)
      Vacuum knot - installation details
      Removal, service and installation of the secondary pump (AT to No. 3652931)
      Removal and installation of a forward cover with the secondary pump
      Removal and installation of the LB3 piston
      Removal and installation of a back cover of transmission
      Dismantling and assembly of valvate assembly of AT
      Dismantling and assembly of transmission
      Installation and check of a gap in a multidisk brake of B3
      Measurement of a gap in B1 brake
      Coupling of the raising transfer
      Removal, installation and check of components of a brake of BS of the raising transfer and coupling of KS
      Dismantling and assembly of the coupling of a free wheeling
      Dismantling and assembly of planetary mechanisms
      Dismantling and assembly of coupling of K1
      Coupling of K2
      Gear shifting selector lever
   + Automatic transmission 722.6
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Coupling of K2


Design of coupling of K2

1 — the Support of external disks
2 — the Piston
3 — Pruzhina
4 — the Spring plug
5, 11 — Lock rings

6 — the Internal disk
8, 10 — External disks
12, 13 — Sealing rings
020 — the Stripper
A — the Gap in coupling of K2


1. Remove a lock ring (11) from an external support (1) of external clutch plates.
2. Remove disks (6), (8) and (10). Check disks for lack of wear and damages.
3. Install a stripper (020) on the spring plug (4) and remove a lock ring (5).
4. Remove the spring plug (4) and springs (3).
5. Take the piston (2) from a support (1).
6. Remove sealing rings (12) and (13) from the piston (2).



1. Install sealing rings (12) and (13) on the piston (2). Track that sealing edges were not overwound and were established in the direction of an arrow.
2. Install the plug (021) on a support (1), grease the plug (021) and sealing rings (12) and (13) gearbox oil, carefully install the piston (2) in a support (1), press the piston (2) without distortion, slightly turning it.
3. Install the spring plug (4) and springs (3).
4. Install a stripper (020) on the spring plug (4) and establish a lock ring (5).
5. Establish disks (6), (8) and (10) in a support (1).
6. Establish a lock ring (11).

Check of a gap

Check a gap of "A". The nominal size of a gap "And" in coupling of K2 lies within the range of 0.7-1.3 mm. Adjust a gap with way of a selection of a lock ring (11). Lock rings 2.0, 2.5 and 3.0 mm thick are issued.