TOOLS
d) Disconnect the “bibax” from the brake disc 12 mm socket and
extension
e) Disengage the assembly of the flexible coupling, driveshaft and pivot, through the opening in the sidemember.
6 Remove the closing panels, under the brake discs. Drain the gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mm box spanner
7 Remove the screws fixing the gearbox support arm on the front crossmember and on the gearbox. Move the
support arm towards the brake disc and remove the four screws fixing the housing to the gearbox. Disengage
the assembly of the housing and brake disc from underneath the car . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 mm spanner
14 mm ring spanner
14 mm box spanner
12 mm spanner
IMPORTANT - Do not lose the spacer (4) and the differential bearing adjusting washer (5) (see Pl. 54).
8 Prepare the bearing face on the gearbox (see Op. DS 330-3, paragraph 19).
REFITTING.
9 If the differential shaft housing is renewed, it is necessary to re-adjust. Proceed as follows
a) Put the dial gauge support 1766-T, together with the dial gauge 2437-T, fitted with the extension 2438-T, as
shown on Pl. 60, fig. 2, on the old housing.
Set the dial at “0” and note the position of the totalising needle. For example : between 1 and 2 . . . . . . . . . . . . . Support 1766-T
Dial gauge 2437-T
Extension 2438-T
b) Put the support 1766-T on the new differential shaft housing and note the position of the needles. For example
totalising needle between I and 2 and large needle at 16. The new housing being shorter than the old one by
0.16 mm. When assembling, it is necessary to increase the thickness of the assembly of the distance piece (4)
and the adjusting washer (5) (see Pl. 60, fig. 1), by 0.16 mm, in order to retain the adjustment of the differential
bearings.
c) If the new housing is longer than the old housing (large needle at 90, for example), it is necessary to reduce the
thickness of the bearing adjusting washer and distance piece assembly (by 0.10 mm in the example selected).
NOTE - This setting can also be obtained by using a straight edge MR-3377 (see Pl. 56, fig. 2) fitted with a dial
gauge 2437-T and an extension 2438-T, or using a depth gauge fitted with a straight edge . . . . . . . . . . . . . . . . or straight edge
MR- 3377
Dial gauge 2437-T
Extension 2438-T or
Depth gauge and
straight edge.
10 Prepare the bearing face on the gearbox (see Op. DS 330-3, paragraph 27).
DS 19 OPERATION No. DS 330 - 4
Replacement of a differential shaft - brake disc or a differential shaft housing
or a front support arm
Op. DS 330 - 4 214
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