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
   Check of a compression in engine cylinders
   Check of the engine by means of the vacuum gage
   Belt of the streaming drive of auxiliary units
   + 6-cylinder petrol engines (M104.944 and M104.990/994)
   + 8-cylinder petrol engines (M119.970/981 and M119.971/981)
   - 12-cylinder petrol engines (M120.980/982)
      The air cleaner - installation details
      Covers of heads of the block of cylinders
      Removal and installation of the inlet pipeline
      Removal and installation of a final collector
      The valve of recirculation of the fulfilled gases - installation details
      Air supply pump
      Removal and installation of the top forward covers
      Heads of the block of cylinders
      Removal and installation of a cover of a chain of the GRM drive
      Replacement of a chain of the GRM drive
      The GRM drive - the general information, service of components
      Natyazhitel of a GRM drive chain
      Camshaft regulator
      Removal and installation of camshafts
      Check of phases of gas distribution
      Check and adjustment of position of camshafts
      Replacement of the directing plugs of valves
      Measurement of diameters of cylinders
      Removal and installation of pistons
      Check of rods
      Removal and installation of a bent shaft
      Removal and installation of the pallet of a case of the engine
      The oil level sensor switch - installation details
      The oil pump - a design and details of installation
   + 6-cylinder diesel engines (OM603.971)
   + 6-cylinder diesel engines (OM606.961)
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






12-cylinder petrol engines (M120.980/982)

Removal

Removal and installation of M120.980 engines


 PERFORMANCE ORDER

1. Lift a cowl.
2. Disconnect a negative wire from the battery.
3. Remove the air filter together with the measuring instrument of an air stream.
4. Remove the lower protective guard of the engine.
5. Remove a radiator.
6. Turn off oil pipelines of the AT transmission liquid.
7. Attach a protective plate on the conditioner condenser.
8. Disconnect a driving cable from the cowl lock at the left.
9. Disconnect cooling system branch pipes in a back part of a head of the block of cylinders.
10. Remove the fan coupling together with the fan.
11. Take off a generator drive belt.
12. Disconnect fuel-supply lines (60).
13. Uncover (6) wires.
14. Disconnect conducting of the engine (all sockets).
15. Remove a driving cable (98) (management of a butterfly valve).
16. Turn off vacuum tubes from the vacuum amplifier on the inlet pipeline.
17. Extract liquid from the tank of the pump of the amplifier of steering.


Removal and installation of M120.980 engines


 PERFORMANCE ORDER

1. Disconnect pipelines from the pump of the amplifier of steering (26), (27), (28) and (29).
2. Turn off an arm of fastening of pipelines.
3. Unscrew pipelines (13) and (14) from the oil heater and the right tube of cooling (13) from a cross beam of a radiator.
4. Remove the sensor of pressure of oil (B5).
5. Disconnect the compressor of the conditioner (11) with the attached tube.
6. Remove an exhaust pipe (7) assembled.
7. Merge cooling liquid.


Removal and installation of M120.980 engines


 PERFORMANCE ORDER

1. Turn off a guard (32) conductings of a starter.
2. Disconnect a wire of a chain (30) from a starter.
3. Remove the flexible hinge of the driveshaft.
4. Turn off a connection wire on "mass" of the transmission.


Design of a back support of a suspension bracket of the power unit

1 Elastic element
2 Torsion limiter
3 Arm


 PERFORMANCE ORDER

1. Remove a back arm (10) without engine support.
2. Disconnect the lever of gear shifting (9) from the transmission.
3. Disconnect an electrical wiring from the transmission.


Removal and installation of M120.980 engines


Design of a forward support of a suspension bracket of the power unit

1 — the Arm
2 — the Bolt M10_55
3 — the Termozashchitny screen
4 — the Support
5 — the Holder
6 — the Bolt M8_42
7 — the twisting Limiter


 PERFORMANCE ORDER

1. Turn off a forward support of the engine (12) on both sides. The design of a forward support is shown on сопр. illustrations.
2. Attach the elevator to the engine.
3. Lift the engine and the transmission until the compressor (11) is not able life it is removed from an arm on the engine with the attached tubes.
4. Lift the engine and remove it.

Installation

Installation is made as it should be, the return to removal.