B2CG56K1 - 206 MA GEARBOX

DISMANTLING-ASSEMBLY DIFFERENTIAL

1 - SPECIAL TOOLS

reference | description | reference | reference
--- | --- | --- | ---
[1] | thrust button for extracting final drive bearings | (-).0317-JZ | 4508T-J'
[2] | tool for fitting final drive bearings | (-).0317-D | 7.101T-D

reference | description | reference | reference
--- | --- | --- | ---
[3] | universal extractor | FACOM U53T + U53K | 4108-T

2 - PRELIMINARY OPERATIONS

Dismantling : Gearbox .

Removal : Gearbox casing .

Removal : Input, output shafts and differential .

3 - IDENTIFICATION OF DIFFERENTIALS

3 - 1 - DIFFERENTIAL : DIAMETER 68 MM

The 68 mm diameter differential has ribs (a) at the rear of the unit .

The 68 mm diameter corresponds to the diameter of the sphere of evolution of the sun gears .

3 - 2 - DIFFERENTIAL : DIAMETER 77 MM

The 77 mm diameter differential does not have any ribs at the rear of the unit .

The 77 mm diameter corresponds to the diameter of the sphere of evolution of the sun gears .

4 - DISMANTLING

4 - 1 - DIFFERENTIAL : DIAMETER 68 MM

Remove :

- the differential pinion shaft circlip (1)
- the differential pinion shaft (2)
- the planet wheels (3), turning the sun wheels
- the sun wheels (4)
- the friction shell (5)

4 - 2 - DIFFERENTIAL : DIAMETER 77 MM

Remove :

- the differential pinion shaft circlip (6)
- the differential pinion shaft (7)
- the planet wheels (8), turning the sun wheels
- the friction housings (9)
- the sun wheels (10)
- the sun gear centraliser (11) opposite the crown wheel

4 - 3 - DISMANTLING (CONTINUED)

Remove the speedometer drive gear (12) .

WARNING : maintain the matching of the outer races if the bearings are to be re-used .

Extract the bearings (13) .

5 - ASSEMBLY

WARNING : bearings removed must not be re-used .

Fit :

- the new bearings (13)
- a new speedometer drive gear

5 - 1 - DIFFERENTIAL : DIAMETER 68 MM

Fit the friction shell (5), collar (A) on the speedometer gear side .

Fit :

- the sun wheels (4)
- the planet cage (3)

5 - 2 - DIFFERENTIAL : DIAMETER 77 MM

Refit the sun gear centralising device (11) in its location, on the opposite side to the crown wheel (bond it using grease) .

Fit :

- the sun wheels (10)
- the planet gears (8), with the friction cups (9)

5 - 3 - ASSEMBLY (CONTINUED)

Turn the planet wheels .

Insert the differential pinion shaft (7) through the differential box and the planet cage .

Clip the differential pinion shaft (6) to the differential box .

6 - COMPLEMENTARY OPERATION(S)

WARNING : observe the cleaning and refitting conditions .

Refitting : Input, output shafts and differential .

Refitting : Gearbox casing .

Reassembling : Gearbox .