DS 19 OPERATION No. DS 330-3 Overhauling a gearbox. Op. DS 330-3 208
TOOLS
c) Put the adjusting fixture on a surface plate, resting on the two ground bearing pads. (In this position, the pointer
of the dial gauge is at 55 mm from the centre line of the ground semi-circular bearing faces).
Turn the figure "0" on the movable dial on the dial gauge opposite the large needle.
Note the position taken up by the needles on the dial gauge.
Example : Totalising needle between 4 and 5; large needle on “0”.
d) To measure the actual bevel pinion setting.
1. Put the adjusting fixture in place of the differential.
Turn the adjusting fixture by means of the knurled handle until the large needle of the dial gauge changes its
direction of location.
Mark the information given by the needles of the dial gauge.
Example : Totalising needle between 1 and 2; large needle on 82.
2. Bring the needles to the position in which they were in paragraph “c” (in the example chosen, the totalising
needle was between 4 and 5; the large needle on “0”), by pulling on the dial gauge spindle.
3. Release the spindle of the dial gauge slowly, counting the numbers of turns and fractions of turns described
by the large needle, until the point of the dial gauge spindle rests on the ground face of the bevel pinion.
Check that the dial gauge needles have taken up the position indicated in paragraph “1”.
Example : The large needle has turned 1.45 turns, that is to say, that the difference between the positions
when the adjusting fixture 2044-T was checked on the surface plate (see paragraph “c”) and the point of the
dial gauge has moved forward 1.45 mm.
The actual bevel pinion setting “y” is 55.00 + 1.45 = 56.45 mm.
The dimension etched on the ground end of the bevel pinion being for example : 56.70, it is necessary to
withdraw the bevel pinion shaft from the centre line of the differential by 56.70 - 56.45 = 0.25 mm.
The adjusting shim being 3.7 mm thick, it will be necessary to replace it by a shim of a thickness: 3.7 - 0.25
= 3.45 mm.
Remove the lower bearing cover plate (8). the nut (12), extract the cage and bearing assembly, replace the shim.
Refit the lower bearing cover plate. The joints to be fitted with grease. Insert a spring washer under the head of
the screws. Put Hermetic under the heads of the screws passing though the casing.
Check the adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 mm box spanner
37 Fit the speedometer pinion, the bush and the flange. Insert a spring washer under the head of the screw.
38 To adjust the engagement of the gears (see Pl. 52 and 55).
a) Put the selector fork (64) in the 3rd or 4th speed position. The object of this operation is to immobilise the
selector shafts. Put the synchromesh gear (90) in the position corresponding to that of the fork.
Put the other sliding gears in the neutral position.
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