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Porsche 930 TURBO - 1989 GENERAL DATA Manual page 92

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Differential.
Final
Drive
Thickness of spacer S
2
8. Calculate"S ".
.'S "= shi~tthickness
tot
+ measured value
+ tapered roller bearing preload
6, 15 mm
2
= 3, 075 mm
+
0, 20
mm
3, 275 mm
Example:
Note
Shim thickness
Measured value
Preload (constant vMttej
5, 00 mm
O-.82mm
0.33 mm
6, 15 mm
Spacexs are available in thicknesses of 2, 4 to
3, 7 mm, in steps of 0,10 mm.
A 0, 25 mm thick shim pexmits spacing with
0,05 mm.
tot
Round off the spacer thicknesses to the available
distance that the total shim thickness 81 and 82
is not changed.
9. Remove differential,
pull off both tapered
roller bearings and split up total shim thick-
ness"5
..as follows.
Becaus~o~f backlash adjustment later spacer
5 is selected 0, 20 mm thinner than spacer
51
2'
Example:
Rounded off spacer thicknesses
S + S
= 2,85 + 3,30 = 6,15 mm.
1
2
Example:
Total thickness of spacers 5 + 5 = 6.15 mm.
Thickness of spacer 51:
1
2
6,15 mm
2
Measure thickness of shims at several points with
a micrometer. Max. permissible deviation
0.02 mm.
Check shims for burrs and damage.
= 3, 075 mm
-0.20
mm
2, 875 mm
Printed in Germany
39 -16

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9301977 9301978 930911 turbo 1989