44
Timing gears
The camshaft, oil pump, injection pump, circulation
pump (TAMD71), 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.
Turbocharger
1.
Compressor wheel
4.
Turbine housing (freshwater
2.
Compressor housing
cooled)
3.
Bearing housing
5.
Turbine and shaft
Timing gears
1.
Crankshaft drive gear
6.
TAMD71: Drive gear for
2.
Intermediate gear for oil pump
coolant pump
3.
Drive gear for oil pump
7.
Drive gear for camshaft
4.
Intermediate drive gear
8.
Drive gear for seawater
5.
Drive gear for fuel injection
pump/power take-off/
pump
power servo pump
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
fitted on the rear of the engine in connection to the
air cleaner (ACL).
Crankcase gases are passed through a replaceable
filter cartridge which removes any oil mist before the
gases are led out. Any oil is returned to the oil sump
(by a drainage hose on TAMD71). On the filter
casing is also a relief valve which opens if the pres-
sure in the crankcase becomes too high due to a
blocked filter.
Air Cleaner (ACL)
The air cleaner prevents harmful particles from being
sucked into the engine.
TAMD63 engines have a washable filter insert.
TAMD71, TAMD73 and TAMD74 engines however
have a dry filter with a disposable filter element of
folded paper.
It is important that filter replacement/cleaning is
carried out according to the recommended mainte-
nance schedule. A blocked filter causes smoke in the
exhaust gases and reduced engine power.
Turbocharger
The engines are fitted with a turbo charger 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.
2
3
4
1
5
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Summary of Contents for TAMD63L
Page 1: ...INSTRUCTION BOOK TAMD63L P TAMD71B TAMD73P WJ TAMD74C L P ...
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Page 120: ...118 Notes 7740156 Downloaded from www volvopenta com 22 07 2009 00 44 08 ...
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Page 124: ...7740156 0 English 6 2000 AB Volvo Penta SE 405 08 Göteborg Sweden www volvopenta com ...