Mase Generators 42430, Use And Maintenance Manual

Page: 52 / 70

IS 10 T
50 Hz
- 18
GB
GB
filtering mass with diesel fuel once a year to remove nay
impurities.
Dispose of the liquids used for air filter washing in an
appropriate manner. Take them to special collection
centres.
Any maintenance operation on the generator must
be carried out with the engine off after letting it cool
down sufficiently, and must be carried out by
authorised personnel.
Before accessing the generator, disconnect the nega-
tive pole of the starter battery to prevent accidental
starting of the generator.
6.4 Fuel filter replacement
To guarantee long life and proper functioning of the
engine, it is extremely important to periodically replace
the fuel filter cartridge, respecting the frequency indicated
by the engine manufacturer as listed in the table in
Paragraph 5.12.
This operation is carried out in the following steps:
- Close the fuel cock [Fig. 3, Ref. 24]
- Completely unscrew the ring nut of the support [Fig. 3,
Ref. 13]
- Remove the old cartridge and position the new one.
- For remounting repeat the operations in reverse order.
When the filter has been replaced, bleed the fuel system
carrying out the operations described in Paragraph 3.2.
Avoid contact of the fuel oil with the skin. During
maintenance operations use gloves and protective
glasses.
In case of contact with fuel, immediately and
thoroughly wash the affected part with soap and
water.
When the operation has been completed, thoroughly
wipe off all traces of fuel and take the used cloths to
special collection centres.
6.5 Coolant check
Periodically check the coolant level in the closed-circuit
cooling system. The reference index for this check is
printed on the expansion tank [Fig. 3, Ref. 11]. If the level
is insufficient, pour coolant into the expansion tank,
taking care not to exceed the maximum level index.
Never open the cap of the expansion tank [Fig. 3, Ref.
11] or coolant tank [Fig. 3, Ref. 20] when the engine
is hot to prevent dangerous coolant leaks.
6.6 V-belt tension check
A V-belt is used to transmit the rotary motion from the drive
shaft pulley to that of the seawater pump [Fig. 9 Ref. 1].
Excessive belt tension accelerates wear, while a slack
belt makes the pulleys idle and does not allow sufficient
water circulation.
Adjust the belt tension as follows:
Loosen the two adjusting screws [Fig. 9, Ref. 2] and move
the seawater pump outwards to increase the tension or
inwards to decrease it. Lock the screws and check the
tension.
The correct belt tension is such as to allow a yield of about
5 mm [Fig. 9] under a thrust force of 8 kg.
A second belt is used to transmit the rotary motion from
the drive shaft pulley to that of the closed-circuit coolant
pump and the battery charger DC alternator [Fig. 9 Ref. 3].
Adjust the belt tension as follows:
Loosen the adjusting screw [Fig. 9 Ref. 4] and move the
battery charger DC alternator [Fig. 9, Ref. 5] outwards to
increase the tension and inwards to decrease it.
The correct belt tension is such as to allow a yield of about
10 mm [Fig. 9] under a thrust force of 8 kg.
To prevent the belt from slipping, do not dirty it with
oil. Clean the belt with petrol if any oil is spilled.
Keep hands away from the V-belt or the pulleys when
the engine is running.
6.7 Emptying the cooling system
To carry out maintenance on the water/air exchanger or
on the cooling system the seawater must be drained from
the intake circuit. This operation is carried out as follows:
- Close the sea intake cock [Fig. 6, Ref. 2]
- Open the drain tap [Fig. 6, Ref. 3] until all the water has
run out
- Close the drain tap.