Mercedes C-Class

W203 since 2000 of release

Repair and car operation


Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
- Coupling and power shafts
   + Coupling
   + Driveshaft
   + Power shafts of wheels
   - Differential
      Dismantling and differential assembly
      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 differential assembly with automatic blocking
+ 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 and assembly of a reducer of the main transfer

11 and, 43е, 46b. — External rings of the bearing
11b, 43d, 46a. — Internal bearing ring
13 — the differential Case
13а — Bolts
29, 30 — Lock rings
32а — 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
47а — the Conducted gear wheel
50 — the reducer Case
54 — the Back cover
55 — Sapun

Dismantling

 PERFORMANCE ORDER

1. Remove the case 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 (32а).

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 (11) and roller bearings from the reducer case.

9. Take differential (13) of a reducer.

10. Take both internal rings (11b) conic roller bearings from differential (13).

11. Weaken and unscrew bolts (13а) fastenings of a conducted gear wheel of the main transfer.
12. Remove a conducted gear wheel of the main transfer (47а) from differential (13).
13. Weaken and unscrew a nut (40) fastenings of a flange (41).
14. Remove a flange (41).
15. Take a leading gear wheel of the main transfer (47) of 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) and (43е) from a reducer.
19. Remove laying (45).
20. Remove the plug (44) with laying (48) from a leading gear wheel.


Check

 PERFORMANCE ORDER

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


Assembly and adjustment

 PERFORMANCE ORDER

1. Press an internal ring of the bearing (46а) on a leading gear wheel (47).
2. Count up thickness of laying (45) and establish it in the reducer case.
3. Establish external rings of bearings (46b), (43е) in the reducer case.
4. Establish the plug (44) with laying (48) from both parties on a leading gear wheel.
5. Establish a leading gear wheel (47) in a reducer (50).
6. Establish an internal ring of the bearing (43d) on a leading gear wheel and press them together with a radial epiploon (42).
7. Establish a flange (41) on a leading gear wheel.
8. Tighten a nut (40).
9. Adjust the friction moment in the bearing of a leading gear wheel.
10. Check a gap of a leading gear wheel.
11. Establish a conducted gear wheel (47а) on differential (13). For this purpose it is necessary to heat up a conducted gear wheel to temperature 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. Oil volume: 1.2 l.
3. Replace сапун (55) on a back cover (54).

Specifications:

The friction moment in the bearing of a leading gear wheel (new conic roller bearings): the 215-245th.
Tolerance from adjusting parameter on the end of a leading gear wheel:-0.02/+ 0.01 mm.
Gap between the leader and the main transfer conducted by gear wheels: 0.08-0.014 mm.
Axial gap between a flange and the differential case: 0.03-0.3 mm.