A4 Mk1
Adjusting drive pinion and crown wheel
Adjusting crown wheel
(Adjusting differential) Repairs after which the crown wheel must be adjusted => adjustment overview on Page 39-39. Special tools, testers and auxiliary equipment required
Determining total shim thickness "Stotal" for shims "S1" + "S2" (Setting preload of taper roller bearing for differential)
Note: If only the taper roller bearings for the differential are being renewed, the crown wheel can be removed from the differential housing. The pinion shaft does not then need to be removed.
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Note: For measurement purposes a shim "S2" with a thickness of 1.20 mm is initially inserted. It is referred to as "S2*" in the following. After determining the backlash "S2*" will be replaced by the correct "S2". |
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Note: The tip of the dial gauge must be positioned on centre of differential.
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Determining thickness of shim "S1*" Notes:
Measuring frictional torque (check) Notes:
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Notes:
Determining average backlash
Note: If the individual measurements differ by more than 0.06 mm this means that the installation of the crown wheel is not correct or that the final drive set itself is defective. Check installation, replace final drive set, if necessary. Determining thickness of shim "S2"
=> Parts List The following shims are available for "S2"
1) Using the shim tolerance variations it is possible to find the exact shim thickness required, insert two shims if necessary. Determining thickness of shim "S1"
=> Parts List The following shims are available for "S1"
1) Using the shim tolerance variations it is possible to find the exact shim thickness required, insert two shims if necessary. |
→ Check measurement
Notes:
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