Technical data

24
Design and function
Oil cooler, engine
The lubricating oil transports heat away from the
hottest parts of the engine and evens out the
temperature differences in the engine as it circulates.
In the oil cooler, the heat is taken out of the oil. The
oil temperature can thus be kept at a lower level
under heavy loading and high engine speeds.
This is beneficial for wear since the lubricating
properties of the oil are impaired if the oil temperature
gets too high.
Low quality oils are most sensitive in this respect.
The engine oil cooler is located beneath the left-hand
side of the engine, beneath the injection pump.
The lubrication oil circulates inside the heat exchange
matrix whereas the coolant passes between the cell
plates.
The oil cooler is connected to the fresh water system.*
* On the TAMD 63 with hull cooling, the engine oil cooler is connected
to the coolant pump cooling circuit (circuit 1).
Oil cooler, reverse gear
The reverse gear oil cooler is mounted on a bracket
above the flywheel housing at the rear of the engine.
The oil cooler is connected to the sea water system*.
Sea water flows through the pipes in the oil cooler
insert and takes away the heat which passes through
the pipes.
* On the TAMD 63 with hull cooling, the engine oil cooler is connected
to the sea water pump cooling circuit (circuit 2).
Coolant
NOTE! Glycol and rust-prevention agents are
hazardous (dangerous to drink).
The engine’s internal systems (fresh water system)
contain a mixture of fresh water and anti-freeze or
rust-preventer.
NOTE! It is very important that the engine is not filled
up with pure fresh water without any additives.
To avoid frost and corrosion damage to the engine,
the following mixture ratios are recommended:
If there is a risk of frost
Use a mixture of 50% Volvo Penta anti-freeze (glycol)
and 50% clean fresh water. This mixture protects the
engine from frost damage down to about –40°C and
should be used all the year round.
The coolant must contain at least 40% anti-freeze to
give full corrosion protection.
Flow through the engine oil cooler
1. Inlet, coolant
2. Outlet, coolant
3. Inlet, oil
4. Outlet, oil
5. Oil for piston cooling
6. By-pass valve
7. Surplus oil returns to the sump
If there is no risk of frost
If the engine is used in areas where there is never any
risk of frost, the coolant can be mixed with Volvo
Penta rust prevention additive (part no. 1141526-2).
NOTE! Never mix rust preventer with glycol. Foam
may be generated which will seriously impair cooling.