Volvo Penta — Propeller shaft, shimming (lower gear housing)
Adjustments · Propeller shaft / rear bearing housing
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- Make sure that the surface is not damaged. Do not use steel tools.
Procedure
- Use the previously installed shims in the first instance; otherwise calculate as below.
- Put the outer bearing race on the front ball bearing, press hard and measure distance X with a caliper gauge.
- Read the stamped T dimension on the gear housing division and the engraved K dimension on the gear wheel.
- Shim thickness = 101 + (T + K) - X. Example gives 0.92 mm.
- Put shims of the correct thickness in the gear housing, adding a further 0.05-0.10 mm.
- Alternative: add shims until the outer bearing race is flush with the gear housing.
- Read dimension B punched on the rear bearing housing; shim thickness = Y - B.
- Shims are available in 0.10 mm, 0.15 mm, 0.35 mm and 0.50 mm.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Shims available in standard thicknesses: 0.10 mm, 0.15 mm, 0.35 mm, 0.50 mm
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.