Volvo Penta 120S, Workshop Manual

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Repair - MS2 reverse gear and upper gear housing, sailboat drive
85. Install the cover on the housing, and tighten it with
four screws.
Reverse gear MS2
Flank clearance
86. Put an 0.20 mm shim on the outgoing bearing
housing, and install it on the housing.
87. Measure the flank clearance with a dial gauge and
rocker
9999683 .
Flank clearance: 0.10-0.25 mm (0.004-0.010")
Adjust the flank clearance if necessary.
Not enough clearance: . Add more shims to the out-
put bearing housing.
Not enough clearance: . Reduce the shim thickness
in the bearing housing.
84. Put in shims of the calculated thickness, plus a
further 0.5 mm in the cover and install the bearing
race. Put a plate on the bearing race and press.
NOTE! Align the bearing race carefully, to ensure that
it does not go in crookedly.
The extra shim thickness will be removed later, when
the flank clearance has been tested.
9999683