Shimming
If the reading obtained is outside the tolerance range, the pinion must be adjusted. Adjustment is carried out by shimming between the bearing housing and the gearcaseSHIM TABLE FOR MANUAL GEARBOX
Location Shims
Thickness, mm (in) Part No.
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Output shaft 0,10(0.004) 83 41 752
between bearing 0, 15 (0.006) 83 41 760
housing and 0,30(0.012) 83 41 778
gearcase. 0,50(0.020) 83 44 723
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1. Shims
2. Roller bearing
3. Bearing housing
4. Pinion
THE SHIMMING PROCEDURE IS AS FOLLOWS:
1. Remove the four bearing housing bolts and gently tap the shaft out of the gearcase.
2. Alter the shim thickness as follows:
If the dial indicator reading is high, increase the thickness of the shim combination.
If the reading is low, reduce the thickness of the shim combination.
NOTE: A + reading is anti-clockwise and a - reading is clockwise. The amount by which the thickness of the shims is increased or decreased can be determined by calculating the difference between the measured value and the correct value.
If the pinion is stamped - 7, the dial indicator pointers should read - 0.07 mm (0.003 in). The tolerance on this value is +/- 0.05 mm (0.002 in).
3. After determining the correct combination of shims, place the shims on the gearcase using the guide pins. Use sleeve 83 90 148 and drift 83 90 114 to fit the output shaft to the gearcase.
Fit two of the bearing housing bolts and tighten them lightly. Remove the guide pins, fit the other two bolts and tighten all bolts alternately to the specified torque.
Tightening torque: 23-28 Nm (17-21 lb ft).