TRANSMISSION
Page
F31
(d)
Repeat the procedure on teeth at obout
90°, 180° and 270' around
the crown wheel from the first measurement. The difference between
any two measurements should not exceed 0.10 mm.
If
a reading
exceeds this figure it will indicate the crown wheel
is
running out of
true or
is
badly fitted.
(e)
Make
a note of the minimum clearance.
Example clearance
=
0.73 mm
Adjust the backlash.
IMPORTANT:
The clearance between the teeth
is
adjusted by redistributing
the
adiusting washers against the left
-
hand and right
-
hand
bearings. Under no circumstances must the overall thickness
of the washers be altered, see DIFFERENTIAL
BEARINGS
ADJUSTMENT.
(a)
The clearance must be adjusted to within the limits 0.16 mm and
0.24 mm. Aim for an average clearance of
0.20
mm.
(b)
Subtract
this
average clearance from the minimum reading noted; for
the example given, this will be:
0.73
-
0.20
=
0.53 mm
therefore, for this example the clearance must be reduced by
0.53 mm.
NOTE:
Moving a
0.15
mm adjustin
g
washer from one side to the
other, will
change the clearance by 0.10 mm.
For the exomple therefore, the thickness of the washers to be moved
(c)
In
the example chosen, it
is
necessary to move the crown wheel
towards the pinion by a distance of 0.79 mm.
To achieve this, the thickness of the washers against the right
-
hand
bearing should be reduced to:
8.20
=
0.79
=
7.41
mm,
and the thickness of the washers against the left
-
hand bearing should
be increased by the same amount.
7
OQ
+
0.79
=
7.79 mm
(d)
Recheck the backlosh measurement to verify that the difference
between any two measurements, around the crown wheel, does not
exceed
0.10
mm.
ESPRIT
Issue
04/78
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