Справочник Пользователя для Iveco S30 ENT M23
installation directiVe
14
MAY 2006
S30 ENT M23
8. FUEL LINE
For the installation, the following connections are required:
- from the tank to the pre-filter
- from the pre-filter to the pump inlet
- from the electric pump to the filter inlet
- from the filter outlet to the low pressure mechanical
- from the tank to the pre-filter
- from the pre-filter to the pump inlet
- from the electric pump to the filter inlet
- from the filter outlet to the low pressure mechanical
feeding pump
- from the fuel discharge outlet to the tank.
Components
Pre-filter, electric pump and filter, supplied with the engine,
must be fitted in proximity of the tank, in a relatively low
point of the system. The filter must be prepared as indicated
here below and fastened in such a way to allow easy replace-
ment of the filtering cartridge.
Avoid the use of additional mesh or paper filters along the
feed lines between pre-filter and engine. To avoid introducing
impurities in the feeding lines inside the engine, do not place
filter cartridges pre-filled with fuel in the system.
Materials’ Characteristics
The fuel tank and the suction and return assembly must
withstand the continuous abrasion caused by a flow of fuel
oil of 200 l/h at a temperature of 120 °C without noticeable
1. Low pressure mechanical feeding pump and high pressure common rail injection pump - 2. Electro-injector - 3. Common rail -
4. Pre-filter - 5. Fuel electric pump - 6. Filter.
Figure
High pressure
Low pressure
1
4
06_006_S
2
3
6
5
deformation or wear or release of material. Use of metal
tanks, preferably made of iron alloys, is allowed, provided
they are connected to the negative terminal of the battery
to prevent the accumulation of electrostatic charges.
Tanks must be provided with vents to avoid exceeding an
internal pressure of ± 5kPa (± 0.5 m of H
2
O column); their
shape and the suction assembly must be such as to assure a
suction at the maximum longitudinal and transverse inclina-
tion allowed for the boat, with a residual quantity of fuel oil
considered “reserve”.
The suction inlet should be positioned in such a way as to
avoid taking in sludge. The return flow must be in such a way
as to facilitate the mixing of the returning fuel with the fuel
in the tank. If the tank is lower than the filter, then the return
pipe must always be submerged. The pipes and union fittings
of the fuel line must withstand a fuel oil flow rate of 200 l/h
at a temperature of 120 °C and a pressure of 3 bar (300
kPa) without noticeable deformation, wear or release of
material. Metal tubes, preferably made of iron alloys, are rec-
ommended, taking care to connect each individual segment
to engine ground to avoid the accumulation of electrostatic
charges and inserting a vibration damper elastic joint on each
segment. The pipes used must be certified according to the
relevant Countries’ rules or to the standards issued by clas-
sification Bodies.