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)
      Covers of heads of the block of cylinders - installation details
      Removal and installation of the inlet pipeline
      Removal and installation of a final collector
      Removal and installation of heads of the block of cylinders
      Removal and installation of covers of a chain of the GRM drive
      Replacement of a chain of the GRM drive
      Check of phases of gas distribution
      The GRM drive - the general information, service of components
      Removal and installation of the regulator of phases of gas distribution
      Removal and installation of camshafts
      Check and adjustment of control position of camshafts
      Removal and installation of valves
      Replacement of the directing plugs of valves
      Replacement of rings of saddles of valves
      Removal and installation of pistons
      Designation and sizes of pistons
      Check of a condition of rods
      Check of a condition of a bent shaft
   + 12-cylinder petrol engines (M120.980/982)
   + 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






Check of a condition of a bent shaft

The engine of the M119.97 series with the adjusting bearing

Details of installation of a bent shaft with the adjusting bearing

1, 3, 19, 21, 25 — the Bolt
2, 28 — Laying
4, 22 — the Engraver
5 — the Pulley of a bent shaft
6 — the Damper of tortional fluctuations
7 — the Nave
8 — the Asterisk of a bent shaft
9 — the Bent shaft
10 — the Spline
11 — the Top insert of the radical bearing
12 — Nizhny Novgorod an insert of the radical bearing

13 — the Top adjusting bearing (insert) with an oil opening
14 — Nizhny Novgorod the adjusting bearing (insert)
15 — the Top insert of the conrod bearing
16 — the Disk of 4.5 mm
17 — the Drive plate 1.5 mm thick and with a diameter of 296 mm
18 — the Drive plate 1 mm thick and with a diameter of 287 mm
20 — the Gear wreath of a flywheel
23, 29 — Nuts
24 — the Finger
26 — the Arm
27 — the Magnet

Details of installation of a bent shaft with the adjusting bearing are presented on сопр. illustrations. Dimensional characteristics of a bent shaft are provided in Specifications.

Designation of inserts of radical bearings and installation of a bent shaft

 PERFORMANCE ORDER

1. Establish covers of radical bearings, observing designation and starting with the first. The adjusting surface of the block of cylinders - is asymmetric, covers of a bent shaft can be established only in one situation.
2. Grease a carving part and contact surfaces of nuts and tighten their moment 50 Nanometers.
3. Grease a carving part and contact surfaces of side bolts of M10x40, establish them with laying and tighten the moment 50 Nanometers.
4. Measure an opening under the radical bearing in the A, V and S directions at two levels (conicity). If diameter of an opening is more than admissible or has conicity, establish on the interfaced cover surface a plate (max. to 0:02 mm).
5. Insert the lower insert and establish a cover of the radical bearing. Tighten nuts and side bolts the moment of 50 Nanometers.
6. Measure diameters of openings and write down them.
7. Measure diameters of radical necks and define a radial gap of bearings of a bent shaft. Achievement of the required radial gap can be reached by replacement of inserts.
8. Measure width of a neck of the radical bearing. Define an axial gap of a bent shaft. Repair inserts are delivered the increased size.
9. Oil inserts and a bent shaft motive and establish a bent shaft.

Inserts with oil channels are established from above!

10. Tighten covers of radical bearings in the order specified illustrations.

11. Measure an axial side play of a bent shaft.
12. Turn a bent shaft by hand and check ease of its rotation.

Designation of inserts of conrod bearings and their installation

 PERFORMANCE ORDER

1. Check conrod bolts.
2. Insert inserts of conrod bearings, establish covers of rods with inserts and tighten nuts or bolts the moment of 35 Nanometers.
3. Measure diameter of an opening under a conrod neck and write down it.
4. Measure width of a conrod neck and define a radial gap of conrod bearings.
5. Grease inserts, a bent shaft, pistons and cylinders with motive oil. Install pistons and rods.
6. Tighten nuts and bolts of fastening of conrod covers.
7. Measure an axial side play of rods.

Engines of the M119.97/98 series with persistent half rings

Details of installation of a bent shaft with persistent half rings

1, 3, 19, 21, 25 — Bolts
2, 4, 22, 28 — Laying
5 — the Pulley of a bent shaft
6 — the Damper of tortional fluctuations
7 — the Nave
8 — the Asterisk of a bent shaft
9 — the Bent shaft
10 — the Spline
11 — the Top insert of the radical bearing of a bent shaft
12 — Nizhny Novgorod an insert of the radical bearing of a bent shaft
13 — the Top persistent half rings
14 — the Lower persistent half rings

15 — Connecting rods
16 — the Disk 4.5 mm thick
17 — the Drive plate 1.5 mm thick with a diameter of 296 mm
18 — the Drive plate 1 mm thick and with a diameter of 287 mm
20 — the Gear wreath of a flywheel
23, 28 — Nuts
24 — the Finger
26 — the Arm
27 — the Magnet
29 — M5 Nut
30 — the Damper of tortional fluctuations with a pulley
31 — the Gear wreath of a flywheel (only on models with Motronic control system)

Dimensional characteristics of a bent shaft are provided in Specifications.

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