Mase Generators 42430, Use And Maintenance Manual

Page: 53 / 70

IS 10 T
50 Hz
- 19
GB
GB
Reopen the seawater intake cock before starting the
generator.
6.8 Coolant replacement
Yearly change the coolant in the closed-circuit cooling
system.
Connect a 20-30 cm long rubber tube [Fig. 10, Ref. 2] to
the drain tap [Fig. 10, Ref. 1] located on the engine base
to facilitate collection of the used coolant in a collection
receptacle [Fig. 10, Ref. 3]. Open the tap and completely
drain the closed-circuit cooling system.
When the operation has been completed, close the tap
and fill the circuit with new coolant.
Dispose of the used coolant in an appropriate manner
as it is a polluting product.
Take the used coolant to special collection centres
responsible for disposal.
6.9 Zinc anode replacement
To protect the water/air heat exchanger [Fig. 11, Ref. 1]
and the water/coolant heat exchanger [Fig. 11, Ref. 2]
against galvanic current, two sacrificial zinc anodes [Fig.
11, Ref. 4] have been inserted inside them. Periodically
check their state of wear and, if necessary, replace them
in order to prevent that the galvanic current irreparably
corrodes the heat exchanger. It is recommended to
check the zinc anodes at least once a month when the
generator is new to check how fast consumption is, to
then be able to act accordingly.
It is, however, opportune to replace the zinc anodes at
least once a year.
Fig. 11 shows the points where the zinc anodes are
positioned.
6.10 Seawater pump maintenance
At least once a year check the integrity of the rubber rotor
of the seawater pump [Fig. 12, Ref. 1].
Before opening the seawater pump to inspect the rotor,
drain the seawater from the cooling system as described
in Paragraph 5.7.
To access the rotor, remove the cover [Fig. 12, Ref. 2] and
with the aid of a pair of pliers extract the rotor pulling it out
with force. To remount a new rotor, repeat the operations
described above in reverse order.
6.11 Alternator maintenance
The alternator used on this model of generator is type
synchronous, self-energised, with electronic voltage
regulation. This model alternator, without manifold and
brushes, does not require particular maintenance
operations. The periodic checks and maintenance are
limited to removing any traces of damp and oxidation
which might damage it.
6.12 Battery maintenance
For starting all the generator models, it is recommended
to use an 80 A/h battery for ambient temperatures
exceeding 0ºC, and 100 A/h for lower temperatures.
Before installing a new battery it is important that it
undergoes a full charging cycle.
At least once a month check the level of the electrolyte
and, if necessary, top up with distilled water. If the
generator is not to be used for a long period, it is
recommended to disconnect the battery and store it in a
dry place at a temperature over 10ºC and to carry out a
full charging cycle once a month.
If the battery is left completely flat for long periods,
there is a risk of irreparably damaging it.
The positive terminal of the battery must be protected
with Vaseline to prevent corrosion and the formation of
oxide.
For top-ups with sulphuric acid, ready solutions must
be used.
The battery top-up operations with distilled water or
with acid must be carried out with rubber gloves and
protective glasses to prevent accidental contact of
the sulphuric acid with the skin.
In the event of accidental contact, thoroughly wash
the part affected with soap and water and consult a
doctor.
Before recharging the battery check the level of the
electrolyte and, if necessary, fill up with distilled
water. This operation must be repeated when the
recharging cycle has been completed.
5.13 Periods of inactivity
Start up the generator at least once a month. If the
generator is not to be used for a long time, the following
operations must be carried out:
- Change the engine oil
- Replace the oil filter cartridge (see par. 5.2)
- Replace the fuel filter cartridge (see par. 5.4)
- Remove the injectors and pour 2 cc engine oil into each