55
Oil cooler, reverse gear
The reverse gear’s oil cooler is mounted on a bracket
above the flywheel casing at the rear of the engine.
The cooler is connected to the seawater system. The
seawater passes through the pipes in the cooling
core and draws heat off from the oil which passes
between the pipes.
Oil cooler, reverse gear
Maintenance – Cooling System
Antifreeze and anti-corrosion, cleaning
Close sea cock before working on cooling
system.
The coolant should be changed at least once a year
to prevent cooling from becoming impaired due to
deposits in the cooling system, and to avoid the risk
of corrosion damage to the freshwater system since
the anti-corrosive additives in the coolant are con-
sumed over time.
The system should be flushed carefully with tapwater
when changing the coolant. Flush until the water
which runs out of the draining holes is clean.
NOTE! Certain parts of the coolant system in the
engine are of aluminum. Chemical agents must
not be used for cleaning the system.
For information on draining the coolant, refer to:
“Draining coolant” on page 28. For antifreeze protec-
tion, see “Coolant” on page 20.
Filling with coolant
Note! Do NOT open the pressure cap or the
venting nipples on a hot engine. Steam or
hot coolant can spray out and the system
pressure will be lost.
Filling should be carried out with the engine
stopped. Do not fill so quickly that air locks form in
the system. Allow the air to flow out via the filling
opening or vent cock.
When filling an empty system, or if the coolant level
for some reason has dropped so low that it cannot be
seen through the filling opening, open the vent cock
at the turbocharger during filling. The engine must
not be started until the system has been vented
and completely filled.
If a heater system is connected to the engine’s cool-
ing system, the heater control valve should be
opened and the unit vented during filling.
Fill with coolant* to 5 cm (2") beneath the sealing
surface of the filler cap or to between the MIN and
MAX marks on the separate plastic expansion tank
(accessory). For information on coolants refer to:
“Coolant” on page 20. When topping up, use the
same coolant mixture as is already in the cooling
system.
Allow engine to stand 1 hour after filling. Then top up
the coolant if required, start the engine and warm it
up. Check the coolant level.
*Note! The engine coolant system capacity is approx.:
TAMD63: 27 liters (5.9 Imp. gals/7.1 US gals).
TAMD71 and TAMD72: 35 liters (7.7 Imp. gals/9.3 US gals).
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