Mase IS13.5, Инструкция по эксплуатации и обслуживанию

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5.5 Checking the coolant level
The level of coolant level 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 raw water pump pulley [fig. 8,
ref. 1] .
Excessive belt tension will cause it to wear out more
quickly while excessive slackness will cause the pulleys
to slip and not circulate a sufficient quantity of water.
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
3/16" (5 mm) if a thrust of 18 lbs. 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.
The belt has been correctly adjusted if it yields about
3/8" (10 mm) if a thrust of 18 lbs. is exerted [fig. 8 ].
To prevent belt slippage, do not
let oil come in contact with it. The belt must be
cleaned if it has oil on it.
Keep hands away from V-belt
and pulleys when the engine is running.
5.7 Draining the cooling system
Before performing maintenance on the water-air ex-
changer or the cooling system, empty the raw water from
the intake circuit. This operation must be carried out in the
following way:
- 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.
Open the sea cock before starting
up the generator again.
5.8 Replacing the coolant
Replace the cooling liquid inside the closed cooling
system every year.
Connect a piece of 3/4"-1-1/8" rubber tubing [fig. 10, ref.
2] to the discharge valve [fig. 10, ref. 1] at the base of the
engine [fig. 10, ref. 3]. Open the valve and completely
drain the closed cooling circuit into suitable container.
After the circuit has been drained, fill it with new coolant
Do not dump the coolant because
it is a pollutant, but rather deliver to the appropriate
collection center for disposal.
5.9 Replacing zinc anodes.
To protect the water-air heat exchanger [fig. 9, ref. 3], the
engine 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 replaced
if necessary in order to prevent galvanic currents irrepa-
rably corroding the exchanger.
Check the zinc at least once a month when the unit is new
to check the speed at which it is disolving 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
The starting battery for all models should be 12V, 80 A/
h minimum, or a 100 A/h battery for temperatures below
32 °F. Before fitting a new battery, it must be subjected
to a complete recharging cycle.
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