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Volvo Penta D12 - Maintenance Schedule

Volvo Penta D12
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56
Maintenance. Engine, general
Drive belts. Inspection/adjustment
WARNING! Stop the engine before doing any
maintenance work.
General information
Check belt tension and condition regularly. A belt
which is to tense can damage the bearings and a belt
which is too loose can slip.
IMPORTANT! Always change a belt which looks
worn or cracked (belts which operate in pairs
must be changed together).
Alternator belt(s)
The standard alternator, plus the extra alternator if
installed, are driven by a Poly-Vee belt each, for best
function and service life. The belts are tensioned in
the same way.
1. Remove the protective cover over the alternator
drive belt.
2. Undo the inner fixing screw (1) and the lock
screws (2) a couple of turns.
3. Tension the belts with tensioner screw (3). It
should be possible to press the belts down about
5 mm (0.2”) between the pulleys when the ten-
sion is correct.
4. Tighten lock screw (2) and the inner fixing screw (1).
5. Install the protective cover over the alternator
drive belt.
Other belts
The flushing and bilge pump etc. are driven by tra-
ditional drive belts. In general, it should be possible
to press these belts down 10 mm (0.4”) between the
pulleys when the tension is correct.
When you change a drive belt: Clean the belt grooves
before installing the new drive belt.

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