900 L4-1985cc 2.0L DOHC Turbo EFI (1985)
Differential: Adjustments
To Adjust the Crown Wheel Backlash
Certain information for adjusting the crown wheel backlash is stamped on the crown wheel as shown in the figure.
NOTE: If new parts are fitted, adjust the backlash to 0.1 +/- 0.05 mm (0.004 +/- 0.002 in).
If the parts have been in service less than 10,000 km or 6,000 miles, adjust the backlash to 0.17 +/- 0.05 mm (0.007 +/- 0.002 in).
Crown Wheel Markings
870488
= item number (not part number)
9:33
= ratio
84-01
= production and identification date
02
= material code
-17
= backlash of 0.17 mm (0.007 in) N.B. If this information is not specified, assume 0.17 +/- 0.05 mm (0.007 +/- 0.002 in)
1330
= matching number which is also stamped on the pinion.
Check the backlash at four points around the circumference of the crown wheel, and the deviation must not exceed 0.05 mm (0.002 in) from the
specified value.
Adjustment of the crown wheel backlash is carried out by shimming. Up to four shims in suitable combinations may be used.
SHIM TABLE
Location
Shims
Thickness, mm (in)
Part No.
_____________________________________________________________
Between diffe-
0,10(0.004)
83 41 604
rental bearing
0,15(0.006)
83 41 612
housing and
0,30(0.012)
83 41 620
gearcase.
0,50(0.020)
83 41 638
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TO ADJUST THE CROWN WHEEL BACKLASH
1. Place the differential with crown wheel in the gearcase.
2. Fit the left-hand bearing housing (with speedometer drive) without shims and the right-hand bearing housing with the shim set selected earlier.
Tighten the bolts to the specified torque.
Tightening torque for the left-hand and right-hand bearing housings: 23-28 Nm (17-21 lb ft)