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


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 housing
21 — the Gate-type piston
22, 22 — pump Gear wheels
24 — Pruzhina

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 beam of the engine.
3. Disconnect system of release.
4. Turn off bolts (45).
5. Remove the secondary pump.
6. Remove an intermediate plate (19) and a sealing ring (18).



1. Remove gear wheels of the pump (22) and (23).
2. Disconnect a lock ring (28).
3. Uncover (27).
4. Remove a spring (24), the spring plug (25) and the gate-type piston (21) from 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.