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Drive belt. Adjusting and replacing
WARNING! Always turn the engine off before
starting maintenance work.
IMPORTANT! Tighten screw (1) to 50 Nm.
Check and adjust as necessary after operating the
engine when the belts are warm. It should be possible
to depress a belt at the correct tension approx. 10 mm
between the pulleys using normal thumb pressure.
D2-55:
To adjust slacken off the screws (1 and 2). Tension
the belt, adjust to the correct tension and tighten the
screws. Check the tension.
D2-75:
Loosen the alternator fixing screws (1-3). Tension the
belt with the adjustment screw (4), to the correct
tension. Tighten the screws (1-3). Check the tension.
To replace the belt slacken off screws (1 and 2).
Press the generator in towards the cylinder block so
that the belt can be removed. Clean off the pulley
grooves. Install the new belt. Adjust as above. Check
belt tension again after a few hours’ operation.
Drive belt. Check
The belt drives both the circulation pump and the
generator. A belt that is too loose can result in slip-
page, poor cooling and poor charging. A belt that is
too tight can damage the bearings in the circulation
pump and damage the generator.
Check the tension of the belt regularly. Adjust as
required. Check that the belt is not cracked or dam-
aged. Replace a worn belt. Keep a spare belt on-
board.
Maintenance: Engine, general
1
2
10 mm
D2-55
D2-75
1
2
3
4
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