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
   Specifications
   Search of malfunctions - the general information
   + Automatic transmission 722.5
   - Automatic transmission 722.6
      Removal and installation of the AT electrohydraulic control unit (transmission is established)
      Dismantling and assembly of the electrohydraulic control unit
      Dismantling and assembly of a plate of gear shifting
      Dismantling and assembly of the case of transmission and hydrotransformer
      Dismantling and assembly of multidisk brakes of B2, B3 and gear wheel of blocking of transmission in situation "P"
      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 blocks 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
      Removal and installation of the mechanism of blocking of transmission in situation "P"
      Removal and installation of the lever of the selector of gear shifting
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






Dismantling and assembly of coupling of K1

Dismantling

Dismantling and assembly of coupling of K1

83a — the External support of coupling K1
83b — the Sealing ring
86 — the Piston
86a — the Sealing ring of the piston
86b — the Disk spring
87 — the Spring plate

87a — the Sealing ring of a spring plate
88, 90 — Lock rings
89 — the Block of disks
91 — the Lock ring of the coupling of a free wheeling
92 — the Forward coupling of a free wheeling
A — the Oil channel for coupling of K1


 PERFORMANCE ORDER

1. Remove a lock ring (90) from an external support.
2. Remove the block of disks (89) from an external support.
3. Establish a stripper (072) on a spring plate (87) and squeeze it until the lock ring (88) is not released.
4. Remove a disk spring (86b) and the piston (86), having given compressed air to an opening (A).

Assembly

Check of a gap between a lock ring (90) and an external disk (89c)

83a — the External support of coupling K1
86 — the Piston
86b — the Disk spring
89a — the External disk (thickness of 1.8 mm)
89b — the External disk (thickness of 3.5 mm / new thickness is 2.8 mm)

89c — the External disk (thickness of 4.0 mm)
89d — Frictional disks
90 — the Lock ring
L — the Gap


Assembly is carried out as it should be, the return to dismantling. Check a gap between a lock ring (90) and an external disk (89c). The size of gaps in coupling of K1 is specified below in the table. In case of need adjust a gap by selection of a lock ring (90) of the required thickness. Rings 2.6, 2.9, 3.2, 3.5, 3.8 and 4.1 mm thick are issued.

The size of gaps in coupling of K1

Disk

Size of a gap, mm

3
2.70-3.10
4
3.00-3.40
5
3.30-3.70




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