Volvo Penta TAMD162C, Instruction Book

Page: 49 / 84

47
Technical description
Fuel system
The fuel is drawn up by the feed pump from the fuel tank through the pre-filters and is forced through the fine filters to
the injection pump. The injection pump then forces the fuel at high pressure into the injectors. The fuel is atomized
when it is sprayed into the combustion chamber where a powerful air rotation assists uniform combustion of the mix-
ture.
Fuel returned from the overflow valve and leak-off from the injectors is returned to the fuel tank.
Fuel filters
The fuel system has two fine fuel filters connected in
parallel have the same cover. These filters are disposa-
ble, and the filter insert is made of a spirally wound pa-
per filter.
On classifiable engines the fuel fine filters can be re-
placed with the engine running.
A double water-separating pre-filter which is connected
in parallel is also available as an accessory. The inserts
of the double pre-filter can be replaced while the engine
is running if necessary.
It is important that the fuel filters are replaced according
to the maintenance schedule. Blocked filters make the
engine difficult to start and contribute to loss in engine
output.
Pre-filter
Fuel fine filters for replacement while engine is running
Fuel system
1. Fine fuel filter
2. Injector
3. Pressure line to injectors
4. Injection pump
5. Feeder pump, fuel hand pump
6. Overflow valve
7. Return line to fuel tank
8. Double pre-filter
Fine fuel filters