Volvo Penta 120S, Workshop Manual

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38
Repair - MS2 reverse gear and upper gear housing, sailboat drive
Reverse gear MS2. Slipping
clutch/lower bearing cover,
assembly
75. Press the small ball bearing onto the slipping
clutch. Use tool no. 884733 .
76. Preferably use the shims which were installed pre-
viously, if only new bearings have been installed. In
other cases, the shim thickness can be calculated as
in items 77–84.
Calculate the shim thickness for the small bearing
race in the slipping clutch. The housing is stamped
with a D dimension and an E dimension.
Let us assume that the D dimension = 88.82 mm and
the E dimension = 61.30 mm.
NOTE! The D dimension is based on 88.00 and only
the decimals are stamped. The E dimension is based
on 61.00, to which the stamped value should be add-
ed.
Thus: 88 + 0.82 = 88.82 and 61.00 + 0.30 = 61.30.
The example below shows how the shim thickness is
calculated.
Example:
D = 88.82 NOTE! only 82 is stamped
E = 61.30 NOTE! only 30 is stamped
D–E = 27.52
884733
Reverse gear MS2
Slipping clutch,
disassembly
73. When the bearings need to be changed. Press the
small ball bearing off the slipping clutch. Use a man-
drel and knife extractor.
74. Press the large ball bearing off the slipping clutch.
Use a knife extractor and tool no. 884729 .
884729