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


Dismantling and assembly of coupling of K1


Design of coupling of K1

1 — the Support of external disks
2 — the Piston
3 — Pruzhina
4 — the Spring plug
5, 11, 16 — Lock rings
6 — the Internal disk
7, 8, 10 — External disks

12, 13, 17 — Sealing rings
15 — the Disk spring
18 — the Directing piston ring
19 — the Ball
020 — the Stripper
A — the Gap in coupling of K1


1. Remove a lock ring (11) from an external support of external disks (1) of coupling.
2. Remove disks (6), (7), (8), (10) and a disk spring (15). Check disks for lack of wear and damages.
3. Install a stripper (020) on the spring plug (4) and squeeze it until the lock ring (5) is not released.
4. Remove a lock ring (5).
5. Remove the spring plug (4) from a spring (3).
6. Take the piston (2) from a support (1).
7. Remove sealing rings (12) and (13) from the piston.
8. Remove a lock ring (16) from a support of external disks (1).
9. Remove the directing ring of the piston (18).
10. Remove a sealing ring (17).



1. Establish a new sealing ring (17).
2. Establish the directing ring of the piston (18).
3. Establish a lock ring (16) in a support of external disks (1).
4. Insert sealing rings (12) and (13) into the piston (2), - sealing edges have to be directed down (in the direction of arrows); install plugs (021) and (022) in a support of external disks (1).
5. Grease plugs and sealing rings with transmission liquid, carefully insert the piston (2) and press it in a support of external disks (1) without distortion.
6. Install the spring plug (4) and springs (3).
7. Install a stripper (020) on the spring plug (4) and squeeze it.
8. Establish a lock ring (5).
9. Establish a disk spring (15) and disks (6), (7), (8) and (10) in a support (1).
10. Establish a lock ring (11). After installation press a lock ring up the periphery before full installation.

Check of a gap

Measure a gap of "A", in case of need adjust it by a selection of a lock ring (11) of the required thickness (see an illustration 20.1). The nominal size of a gap "A" in coupling of K1 lies within the range of 0.7-1.3 mm. Lock rings 2.0, 2.6 and 3.0 mm thick are issued.