Porsche 1972 911 Workshop Manual page 472

4. Rotate the mandrel carefully until the sensor
forms a right angle with the face of the
pinion. At this point the dial indicator will
show the highest reading. A notch on the end
of the mandrel shows the position of the dial
indicator sensor. Record the reading.
Note the following when reading the dial
indicator:
The distance from the center line of the mandrel
to its resting base is shown on the side of the
mandrel.
The distance from the measuring surface of the
gauge block to its support surface is indicated
on the side of the gauge block.
-
F i n a l D r i v e
B y adding the mandrel and gauge block dimen-
sions the "actual adjusting dimension" is obtained.
Ex a m p l e :
Mandrel dimension
Gauge block dimension
Actual adjusting dimension
If the pointer reads to the right (clockwise), the
distance is smaller than the "actual adjusting
dimension" (66.61 mm)
dial indicator reading from the "actual adjusting
dimension" to determine the distance from ring
gear center to face of pinion.
E x a m p l e :
Actual adjusting dimension
-
Dial indicator reading
Distance from ring gear center
to face of pinion
Adjusting dimension
(as in example on P 5.1-
-
Distance from ring gear
center to face of pinion
Shim thickness
The pinion shaft must therefore be moved away
from the ring gear center by 0.10 mm. This can
be achieved by inserting a 0.10 mm thick shim.
(End numbers from 3 or more should be rounded
off to 5, and from
54.015 mm
12.595 mm
66.610 mm
----------
.
Therefore subtract the
66.61 mm
0.39 mm
66.22 mm
66.32 mm
-
66.22 mm
0.10 mm
7 or more to 10).
911