Lotus Esprit Series, Workshop Manual

Page: 189 / 362

Page
F22
This distance
i s
different for bevel pinion and
i s
checked using the
gauge fixture 3170-T fitted with dial gauge 2437-T. fixture
i s
designed so that
the distance between the centre line of the ground contact faces (drive shaft bearing
surfaces) and the of the probes i s
mm.
This figure i s engraves on the fixture
between the probes.
1. F i n t
calibrate the fixture.
(a)
Clean the bearing surfaces and the ground contoct faces of the
fixing.
(b)
Place the fixture on a surface plate.
(c)
Zero the dial gauge with the large needle on
(d)
Note the position of the totalising needle.
Totalising needle
4
and
5.
Large needle at
.....
.
.
gauge stem not in contact with the ground face of the bevel pinion, unlock
the gauge stem.
3.
Rotate the fixture the bearing surfaces, so the gauge stem over the
ground face of the pinion, until the large needle of the dial gauge about
to change direction. Lock the needle positions and note the
Example:
needle between and
1.
Large needle at 86.
4. Remove the and place once again on the surface plate. Allow the
dial gauge stem to return slowly, so the full revolutions can be
When the gauge to rest on the surface plate the measurement of
the part revolution can be made.
If
the measurements for the example are:
Conic distance
60
+
3.86 63.86
mm.
5.
If
the dimension engraved
on
the pinion for example
i s
63.95
mm then
the bevel must be moved away the differential centre line by:
63.95
63.86
mm.
6 . To the bevel remove the rear housing, the speedometer drive
wheel and the
5th
gear pinion.
7 . Remove the bevel pinion as previously described.
8.
Measure the thickness of the washer which for
example is:
2.81
mm. Replace
this
washer by another with a thickness