Iveco Daily. Manual — part 175
Figure 264
This rotary positive displacement pump with integrated
by-pass is mounted on the suction pipe, on the left-hand side
of the chassis frame.
The fuel pump is the roller-type with positive displacement, a
brush motor with energizing by permanent magnets.
The impeller turns, driven by the motor, creating volumes that
shift from the inlet port to the delivery port.
These volumes are defined by the rollers that stick to the outer
ring when the motor turns.
50707
CROSS-SECTION OF FUEL PUMP
773010
Fuel pump
The pump has two valves, a check valve to prevent the fuel
circuit from emptying (with the pump stationary) and an
overpressure valve that recirculates the delivery with the inlet
when pressures over 5 bar are produced.
Specifications
Delivery pressure:
2.5 bar
Flow rate:
> 155 litres/h
Power supply:
13.5 V - < 5 A
Coil resistance at 20
°C:
28.5 Ohms
596
F1C ENGINE
D
AILY
Base - May 2004
Figure 265
542011
Fuel filter
The fuel filter screwed on the heater support (3) consists of
a cartridge (6) fitted with water sensor (7).
The water accumulation capacity (A) of the filter is approx.
100 cm
3
.
The water indicator (4) is mounted on the bottom end.
Unscrewing the indicator (4) drains off any water.
The heater support (3) has the temperature sensor built-in
(9).
A clogging warning sensor (9) is screwed on the support (3).
When the temperature of the diesel is less than 6
°C, an
electric heating element warms it up to at most 15
°C before
sending it to the high pressure pump.
Clogging indicator characteristics
differential working pressure
1.1 bar
88618
Tightening torques
1.
Bleed screw
4 Nm
4.
Water indicator
0.8
±1.2 Nm
6.
Insert
30
±2 Nm
7.
Fuel filter tightening
18
±2 Nm
9.
Tightening of clog sensor
20
±2 Nm
10. Connector
35
±2 Nm
11. Connector
35
±2 Nm
1. Bleeding screw - 2. Temperature sensor connector - 3. Heater support - 4. Water presence sensor - 5. Heater connector -
6. Threaded insert - 7. Fuel filter - 8. Water separator - 9. Filter clogged sensor - 10. Connector - 11. Connector.
F1C ENGINE
597
D
AILY
Base - May 2004
88070
Figure 266
Pump with 3 radial pumping elements controlled via a gear by
the timing belt; it needs no timing. On the rear of the
high-pressure pump there is the mechanical supply pump,
controlled by the shaft of the high-pressure pump.
The pump is lubricated and cooled by the fuel.
1. Feed mechanical pump - 2. High pressure pump CP3 - 3. Pressure regulator
A. Return to reservoir - B. Delivery to hydraulic accumulator (Rail) - C. Fuel inlet pipe from the filter -
D. Return from injectors - E. Return from hydraulic accumulator (Rail).
The high-pressure pump — supply pump assembly
cannot be overhauled and therefore the fixing
screws must be neither removed nor tampered
with. The only permissible job is replacing the driving
gear.
NOTE
598
F1C ENGINE
D
AILY
Base - May 2004
High-pressure pump
88739
Figure 267
1. Pressure regulator - 2. Modulating valve 5 bar - 3. Fuel filler from the filter - 4. Pump shaft - 5. Delivery valve to hydraulic
accumulator (rail) - 6. Fuel return from high pressure pump - 7. Feed mechanical pump - 8. Delivery valve on single pumping
element.
F1C ENGINE
599
D
AILY
Base - May 2004
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