Volvo Penta — Final assembly (reverse gear MS2 / drive)

Repair & overhaul · Reverse gear / upper gear housing

From a Volvo Penta service manual — check it applies to your exact model before use.

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Procedure

1. Put a needle roller bearing, spacer washer, three small domed washers, large domed washer and lock washer on the vertical shaft.
2. Press the lock washer down with tool 884725 so the retaining ring halves can be fitted.
3. MS2: put the shaft in the housing with the calculated shims and press the outer bearing race on with tool 884732.
4. Align the TOP marking upwards and install the sliding sleeve and needle roller bearing.
5. Put a new O-ring in the upper bearing housing groove and install the housing.
6. Measure the distance between the gear wheel and bearing (3.4-3.8 mm).
7. Install the slipping clutch and its plain bearing.
8. MS2: put a new O-ring on the cover, align the oil drain and screw it down.
9. Install the output bearing housing with the tested shim thickness.
10. 120S: install the rear cover, gear bracket, sea water valve and input bearing housing; fill with oil.

Source: Volvo Penta service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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