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Yanmar 4JH3-TE Series - Inspection Every 50 Hours (or Monthly)

Yanmar 4JH3-TE Series
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GB
4. Maintenance & Inspection
38
(5) Adjusting the Tension of the Alter-
nator Driving Belt.
When there is not enough tension in the V-
belt, the alternator will not turn and power
will not be generated.
When there is too much tension in the V-
belt, the belt will become damaged more
quickly, and the alternator bearing may be
damaged.
1. Check the tension of the V-belt by
pressing down on the middle of the belt
with your finger.
With proper flexion, the V-belt should
sink 8~10mm.
2. Loosen the set bolt and move the alter-
nator to adjust V-belt tension.
3. Be careful not to get any oil on the V-
belt. Oil on the belt causes slipping and
stretching. Replace the belt if it is mar-
red.
4.3.2 Inspection Every 50 Hours
(or Monthly)
(1) Draining the Fuel Filter
1. Close the fuel oil cock.
2. Loosen the plug screw at the bottom of
the fuel filter oil/water separator, and
drain off any water and dirt collected
inside.
Retighten the plug screw.
3. After reassembly, be sure to vent air
from the fuel system. (See 3.2.2)
4. When there is a heavy deposit, drain the
fuel tank at the same time.
JH-Turbo-Engels1b 28-06-2002 19:56 Pagina 38

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