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
- Coupling
   + Coupling
   Driveshaft
   + Power shafts
   - Differential
      Dismantling, assembly and check of differential
      Dismantling and assembly of a reducer of the main transfer and adjustment of gaps of gear wheels
      Determination of thickness of adjusting laying and its installation in the reducer case
      Check and adjustment of a gap of a flange
      Dismantling and assembly of a reducer of the main transfer and adjustment of gaps of gear wheels (model 140.28/032/O33 till 31.05.94 of the issue, 140.042/043/063/1 and with a diameter of 210 differential of mm)
      Dismantling and assembly of differential with automatic blocking
      Replacement of the cylinder of differential with automatic blocking (model 140.028/032/033 till 31.05.94 of the issue and 140.1 with a code 211a)
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






Dismantling and assembly of a reducer of the main transfer and adjustment of gaps of gear wheels

Dismantling

Design of a reducer of the main transfer (model 140.02/03 since 01.06.94 of the issue and with a diameter of 198 differential of mm)

11a, 43e, 46b — External rings of the bearing
11b, 43d, 46a — Internal a bearing ring
13 — the differential Case
13a — Bolts
29, 30 — Lock rings
32a — the Radial epiploon
33 — the Flange of a power shaft
40 — the Nut
41 — the Flange

42 — the Radial epiploon
44 — the Plug
45, 48 — Laying
47 — the Leading gear wheel
47a — the Conducted gear wheel
50 — the reducer Case
54 — the Back cover
55 — Sapun


 PERFORMANCE ORDER

1. Remove the case of a reducer (50). Merge oil from a reducer.
2. Fix a reducer in a vice.
3. Disconnect a back cover (54).
4. Remove a lock ring (30) from both flanges of power shafts (33).
5. Remove flanges of power shafts (33).
6. Vypressuyte left and right radial epiploons (32a).
7. Remove lock rings (29).
8. Insert a pin (046) for differential gear wheels on the right side and press differential so that it on the left side concerned the reducer case. Take both external rings (11a) of roller bearings from the reducer case.
9. Take the case of differential (13) from a reducer.
10. Take both internal rings (11b) conic roller the bearing from the differential case.
11. Weaken and turn off bolts (13a) of fastening of the conducted gear wheel of the main transfer.
12. Remove the conducted gear wheel of the main transfer (47a) from differential (13).
13. Weaken and turn off a nut (40) of fastening of a flange (41).
14. Remove a flange (41).
15. Take the leading gear wheel of the main transfer (47) from a reducer.
16. Vypressuyte an epiploon (42) from a reducer.
17. Remove an internal ring of the bearing (43d).
18. Remove external rings of bearings (46b), (43e) from a reducer.
19. Remove laying (45).
20. Remove the plug (44) with laying (48) from the leading gear wheel.

Check

 PERFORMANCE ORDER

1. Check all details for lack of wear and, if necessary, replace them.
2. Check the leading gear wheel (47) and the conducted gear wheel (47a) for compliance of numbering.

Assembly and adjustment

 PERFORMANCE ORDER

1. Press an internal ring of the bearing (46a) on the leading gear wheel (47).
2. Count thickness of laying (45) and install it in the reducer case.
3. Install external rings of bearings (46b), (43e) in the reducer case.
4. Install the plug (44) with laying (48) on both sides on the leading gear wheel.
5. Establish the leading gear wheel (47) in a reducer (50).
6. Establish an internal ring of the bearing (43d) on the leading gear wheel and press them together with a radial epiploon (42).
7. Establish a flange (41) on the leading gear wheel.
8. Tighten a nut (40).
9. Adjust the friction moment in the bearing of the leading gear wheel.
10. Check a gap of the leading gear wheel.
11. Establish the conducted gear wheel (47a) on differential (13). For this purpose it is necessary to heat the conducted gear wheel to temperature of 75-85 °C.
12. Press an internal ring of the bearing (11b) on differential.
13. Further assembly is carried out as it should be, the return to dismantling.
14. Check and adjust an axial gap of a flange.
15. Fix a back cover (54).
16. Remove a reducer from a vice.

Installation

 PERFORMANCE ORDER

1. Establish a reducer (50).
2. Fill in oil (about 1.2 l)
3. Replace сапун (55) on a back cover (54).

Specifications

 PERFORMANCE ORDER

1. The friction moment in the bearing of the leading gear wheel (new conic roller bearings): 215-245 Nanometers.
2. A tolerance from adjusting parameter on the end of the leading gear wheel:-0.02/mm.
3. A gap between the leader and the main transfer of 0.08 - 0.014 mm conducted by gear wheels.
4. An axial side play of a flange of differential concerning the case of the last 0.03 - 0.3 mm.