Audi Workshop Service and Repair Manuals

Determining pre-load of tapered roller bearings for input gear/spur gear mechanism Determining shim “S5” This setting has to be made if the following components are replaced: t  Gearbox cover t  End cover t  Input gear/spur gear mechanism t  Tapered roller bearing on input gear/spur gear mechanism Special tools and workshop equipment required

t  Measuring plate -VW 385/17- from universal measuring tool -VW 385-

t  Universal dial gauge bracket -VW 387-

t  Crown wheel adjusting tool -VW 521-

t  Dial gauge extension from adapter for dial gauge -2066- l  Outer race/tapered roller bearing for mounting of input gear/spur gear mechanism installed in gearbox cover. l  Outer race/tapered roller bearing with no shim for mounting of input gear/spur gear mechanism installed in end cover. –  Insert the input gear/spur gear mechanism in the gearbox cover.

–  Then attach the end cover -B- to the gearbox cover with the bolts -A- and -arrows- (5x). –  Then move the gearbox cover with end cover attached to the vertical position with the end cover facing downwards.

–  Fit the measurement tools. –  Attach the universal dial gauge bracket -VW 387- at the hole in the gearbox cover with the bolt -B- and a nut. –  Position the dial gauge extension at the centre of the measuring plate -VW 385/37-. –  Set the dial gauge (3 mm measuring range) with 2 mm initial tension to “0”. -A-Dial gauge extension from adapter for dial gauge -2066- –  Move the input gear/spur gear mechanism up and down with the crown wheel adjusting tool -VW 521-. –  Read off the play on the dial gauge (0.76 mm in the example). Example:

Measurement result (example)	0.76 mm
Initial tension (constant value)	+ 0.10 mm
Thickness of shim S5	= 0.86 mm

Note Assign the shims by way of the → Electronic parts catalogue. –  In this example, the thickness of the shim “S5” is 0.86 mm.