59
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
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(s).
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(s) during filling.
The TAMD73 and TAMD74 have two venting cocks
on the flange at the front of the heat exchanger. All
engines also have a venting cock at the turbocharg-
er.
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
cooling 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).
* Note. Cooling system capacity, approx.:
TAMD63: 27 liters (7.1 US gals)
TAMD71: 35 liters (9.3 US gals)
TAMD73, TAMD74: 34 liter (9.1 US gals)
Maintenance – Cooling System
Antifreeze and anti-corrosion, cleaning
Close sea cock before working on cooling
system.
To avoid loss of cooling performance caused by
deposits in the cooling system the coolant must be
changed at least once a year. Another reason for
changing the coolant is the risk of damage from
corrosion in freshwater systems due to corrosion
inhibitor additives losing their effect over time.
The system should be flushed carefully with tap
water 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 32. For frost protection,
see “Coolant” on page 96.
TAMD63, TAMD73, TAMD74
TAMD71
Venting cock in cooling system
TAMD73, TAMD74: Venting cocks in cooling system
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