Mercedes S-Class W-140

1991-1999 of release

Repair and car operation

Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ gear shifting Box
- Автоматичеcкая transmission
   Search of malfunctions - the general information
   - Automatic transmission 722.5
      Removal, check of a condition and installation of the converter of rotation (hydrotransformer)
      Removal and installation of a centrifugal regulator
      Removal and installation of the sensor switch of blocking of a starter (start permission)
      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 LB3 piston installation
      Removal and installation of a back cover of transmission
      Dismantling and assembly of klapanny assembly of AT
      Dismantling and transmission assembly
      Installation and gap check in multidisk brake В3
      Gap measurement in brake В1
      Coupling of raising transfer
      Removal, installation and check of components of a brake of BS of raising transfer and KS coupling
      Dismantling and assembly of the coupling of a free wheeling
      Dismantling and assembly of planetary mechanisms
      Dismantling and assembly of coupling К1
      Coupling К2
      Lever of the selector of gear shifting
   + Automatic transmission 722.6
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Removal, service and installation of the secondary pump (AT to No. 3652931)


Details of installation of the secondary pump (AT to No. 3652931)

18, 29 — Sealing rings
19 — the Intermediate plate
20 — the pump Case
21 — the Gate-type piston
22, 22 — pump Gear wheels
24 — the Spring

25 — the Spring plug
27 — the Cover
28 — the Lock ring
30, 31 — Teflon rings
45 — the Bolt


1. Lift AT.
2. Remove a back cross-section beam of the engine.
3. Disconnect release system.
4. Unscrew bolts (45).
5. Remove the secondary pump.
6. Remove an intermediate plate (19) and a sealing ring (18).



1. Remove pump (22) and (23) gear wheels.
2. Disconnect a lock ring (28).
3. Uncover (27).
4. Remove a spring (24), the spring plug (25) and the gate-type piston (21) of the case of the secondary pump (20). Check a sealing ring (29) and teflon rings (30) and (31) and if it is necessary, replace them.

Assembly and installation

Assembly and installation are made as it should be, the return to removal.