54
Seawater pump
The seawater pump is fitted to the timing gear cover
at the front of the engine. This pump is driven via the
timing gears. The pump impeller is made of rubber
and can be replaced.
Note: The impeller may be damaged if the pump is
run dry.
Seawater pump
Engine oil cooler
1. Inlet, coolant 5. Oil for piston cooling
2. Outlet, coolant 6. By-pass valve
3. Inlet, oil 7. Excess oil returned
4. Outlet, oil to the oil sump
Oil cooler, engine
The lubricating oil transports heat from the high tem-
perature parts in the engine and equalizes the tem-
perature differences within the engine. Heat is re-
moved from the lubricating oil in the oil cooler. This
keeps the oil temperature lower at high load and
speeds. This reduces engine wear as the oil’s lubri-
cating properties are impaired if the oil temperature
gets too high. Lubricating oils of lower quality are
most sensitive to high temperatures.
The engine’s oil cooler is on the left side, below the
injection pump. The engine oil circulates inside the
cooler assembly while the coolant passes between
the cell plates. The cooler is connected to the fresh-
water system.
TAMD71, TAMD72: Heat exchangers (A) and charge
air coolers (B)
Heat exchanger and charge air cooler
(CAC)
The TAMD63 has a single heat exchanger and
charge air cooler (CAC), while the TAMD71 and
TAMD72 have double units connected in series. The
coolers are fitted on the right of the engine, the heat
exchanger(s) foremost.
In the heat exchanger, heat is transferred from the
engine’s inner cooling circuit (the freshwater system)
to its outer circuit (the seawater system). In the CAC
heat is transferred from the charge air from the turbo-
charger to the seawater. See also under “Charge air
cooler” on page 41.
The cooler units are an aluminum housing with a tu-
bular cooling insert.
The seawater passes through the pipes, while the
freshwater (heat exchanger) or charge air (for CAC)
passes between the pipes.
Note! On TAMD71, -72 engines the heat exchangers
and charge air coolers are identical, so the cooling
inserts, for example, are interchangeable.
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