Checking The Cooling Liquid; Checking The Tension Of The V-Belts; Emptying The Cooling System; Replacing The Cooling Liquid - Mase Generators IS11 Manual De Uso Y Manutención

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5.5 Checking the cooling liquid

The level of cooling liquid in the closed cooling circuit
must be checked regularly. The reference marks for his
check are displayed on the expansion tank [fig. 7, ref. 5].
If the level is insufficient, pour cooling liquid into the
expansion tank but do not go beyond the marked filling
level.
Never open the cap of the expan-
sion tank [fig. 7, ref. 5] and the exchanger [fig. 7, ref.
6] when the engine is hot to avoid the risk of cooling
water escaping.

5.6 Checking the tension of the V-belts.

A V-belt is used to transmit the rotation direction from the
engine shaft pulley to the sea water pump pulley [fig. 8,
ref. 1] .
Excessive belt tension will cause it to wear out more
quickly whilst excessive slackness will cause the pulleys
to rotate idly and will not enable a sufficient quantity of
water to be circulated.
Adjust belt tension in the following manner: loosen the
two adjusting screws [fig. 8, ref. 2] and move the sea
water pump to the outside to increase tension and to the
inside to slacken it. Lock the screws in position and
check belt tension.
The belt has been correctly adjusted if it yields about 5
mm if a thrust of 8 kg is exerted
5 mm [fig. 8 ].
A second belt transmits the rotation from the engine
shaft pulley to the closed circuit liquid pump shaft and the
battery charger DC alternator shaft [fig. 8, ref. 3].
Adjust belt tension in the following manner:
loosen the adjusting screw [fig. 8, ref. 4] and move the
battery charger DC alternator [fig. 8, ref. 5] towards the
outside to increase tension and to the inside to slacken
it.
The belt has been correctly adjusted if it yields about 10
mm if a thrust of 8 kg is exerted
5 mm [fig. 8 ].
To prevent the belt rotating idly,
do not spill oil onto it. Clean the belt with petrol if it
has oil on it.
Keep hands away from the V-belt
or the pulleys when the engine is running.

5.7 Emptying the cooling system

Before carrying out maintenance on the water-air ex-
changer or the cooling system, empty the sea water from
the intake circuit. This operation must be carried out in
the following way:
GB
- shut off the sea intake valve [fig. 5, ref. 2];
- open the discharge valve [fig. 3, ref. 3] so that the water
drains out completely;
- close the discharge valve again.
before starting up the generator again.

5.8 Replacing the cooling liquid

Replace the cooling liquid inside the closed cooling
circuit every year.
Connect a piece of 20 - 30 cm rubber tubing [fig. 10, ref.
2] to the discharge valve [fig. 10, ref. 1] at the base of the
engine to enable used cooling liquid to be more easily
collected into the collection receptacle [fig. 10, ref. 3].
Open the valve and completely drain the closed cooling
circuit.
After the circuit has been drained, fill it with new refriger-
ating liquid.
liquid because it is a polluting product.
Deliver the refrigerating liquid to the appropriate
collection centre for disposal.

5.9 Replacing zinc anodes.

To protect the water-air heat exchanger [fig. 9, ref. 3], the
water liquid heat exchanger
[fig. 9, ref. 1- 2] and the discharge collector's heat
exchanger [fig. 9, ref. 4] from galvanic currents five
sacrificial zinc anodes have been inserted inside. They
must be regularly checked for signs of wear and re-
placed if necessary in order to prevent galvanic currents
irreparably corroding the exchanger.
Check the zinc at least once a month when the unit is
new to check the speed at which it is wearing out and
take the appropriate action.
Change the zinc anodes at least once a year.

5.10 Alternator maintenance

The alternator used for this model is synchronous, self-
excited with electronic voltage control. This alternator
model does not have a brush collector and does not
require any special maintenance. The regular checks
and maintenance are limited to the elimination of traces
of humidity and oxidation that could damage it.

5.11 Battery maintenance

To start up all the generator models an 80 A/h battery is
recommended for ambient temperatures above 0 °C
and an 100 A/h battery is recommended for tempera-
tures below that. Before fitting a new battery, it must be
subjected to a complete recharging cycle.
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Open the sea water intake valve
Do not dump the refrigerating
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