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Timing gears
The camshaft, oil pump, injection pump, circulation
pump (TAMD71 and TAMD72), seawater pump and
hydraulic pump (if fitted) are driven by the crankshaft
via helical spur gears.
Helical spur gear wheels are used in order to keep
engine noise to a minimum.
Crankcase ventilation
The engines have ventilation devices to prevent
overpressure and to run off diesel fumes, steam and
other gaseous products of combustion. These are fit-
ted on the right side of the engine in connection to
the air cleaner (ACL).
The gases from the crankcase pass through a dis-
posable paper filter which separates off any oil mist
before the gases are led away. Any oil is returned to
the oil sump via a drainage hose. On the filter casing
is also a relief valve which opens if the pressure in
the crankcase becomes too high due to a blocked fil-
ter.
Air Cleaner (ACL)
The air cleaner prevents harmful particles from being
sucked into the engine.
TAMD63 engines have a washable filter insert.
TAMD71 and TAMD72 engines however have a dry
filter with disposable filter elements of folded paper.
It is vital to replace/clean the filters in accordance
with the maintenance schedule. A blocked filter re-
sults in smoky exhaust emissions and less engine
output.
Turbocharger
The engines are fitted with a turbocharger driven by
the exhaust gases which ensures a flow of air to the
engine under pressure and thereby increases the
amount of oxygen to the engine. The compressor,
which is fitted to the exhaust manifold at the rear of
the engine, is lubricated and cooled by the engine’s
lubricating oil.
Turbocharger
1. Compressor wheel 4. Turbine housing (fresh-
2. Compressor housing water cooled)
3. Bearing housing 5. Turbine with shaft
Timing gears
1. Crankshaft gear 6. TAMD71, TAMD72: Drive gear
2. Carrier for oil pump for engine coolant pump
3. Drive gear for oil pump 7. Drive gear for camshaft
4. Carrier 8. Drive gear for seawater pump/
5. Drive gear for injection power take-off/servo pump
pump
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