58
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
Heat exchanger and charge air cooler
(CAC)
TAMD63, TAMD73 and TAMD74 are equipped with
single whileTAMD71 has double series connected
heat exchangers and charge air coolers. The coolers
are installed on the right of the engine with the heat
exchanger(s) furthest forward.
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
turbocharger to the seawater. See also under
“Charge air cooler” on page 45.
The cooler units are an aluminum housing with a
tubular 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 engines the heat exchanger and
charge air cooler are identical, so the cooling inserts,
for example, are interchangeable.
Engine oil cooler
1.
Coolant inlet
5.
Oil to piston cooling
2.
Coolant outlet
6.
By-pass valve
3.
Oil inlet
7.
Excess oil return
4.
Outlet, oil
to oil sump
Oil cooler, engine
The lubricating oil transports heat from the high
temperature parts in the engine and equalizes the
temperature differences within the engine. Heat is
removed 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
lubricating properties are impaired if the oil tempera-
ture 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: Heat exchangers (A) and charge air
coolers (B)
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