Iveco Daily. Manual - part 403

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Base - May 2004

This is a simple transparent filter like the one in petrol supply

systems.
Replace it only when a sight check reveals traces of impurity.

Electric pump

Rotary volumetric pump with integrated by pass (Figure 145)

located outside the fuel tank.
It is on the left-hand side of the frame in an accessible area.
There is no need to bleed the fuel supply system.

TECHNICAL VIEW AND CROSS SECTION OF ELECTRIC FUEL PUMP

The pipes are fitted with quick couplings.
It is connected to pins 7 and 8 of connector A of the control

unit.
Specifications
Delivery pressure:

2,5 bar

Flow rate:

> 155 litres/h

Supply:

13,5 V - < 5 A

Coil resistance at 20 °C:

28.5 Ohm

Figure 145

ELECTRIC/ELECTRONIC SYSTEM

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Fuel filter

Cartridge degree of filtering: 5 micron
Differential operating pressure (obstruction indicator): 0.6 bar
The fuel temperature sent by the sensor to the electronic injection control unit allows very accurate calculation of the flow rate

of the fuel to be injected in the cylinders.
It is located in a fairly accessible position in the left front part of the engine compartment.
1. Actuated by ECU via relay with fuel temperature below 3°C.
2. Filtering element
3. Shows presence of water through a warning lamp on instrument panel.
4. Differential pressure sensor calibrated at 0,6 bar : any clogging is shown by warning lamp
5. It is a NTC sensor connected to EDC for fuel temperature reading enabling electronic control to calculate the amount of

diesel oil to be injected into the cylinders.

6. Installed on filter support for excess fuel return to tank.

FUEL FILTER

1. Heater - 2. Filtering element - 3. Condensation indicator

- 4. Obstruction indicator - 5. Fuel temperature sensor -

6. Discharge

3

2

1

4

5

6

1. Clogged filter sensor - 2. Fuel temperature sensor -

3. Water sensor - 4. Heater

Engine 8040

Engine F1A

1

2

3

4

3

1

2

4

Figure 146

Figure 147

73731

003312t

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This pump has three radial pistons (total displacement 0,7

cc)  controlled  by  the  timing  gear  belt,  with  no  need  for

calibration.
Each impeller unit comprises:
- a  piston  (5)  operated  by  a  cam  (2)  integral  with  the

pump shaft (6)

- a plate inlet valve (3)
- a ball delivery valve (4)
The delivery pressure to the rail is modulated between 250

and 1350 bar by the electronic control unit, acting on the

pressure regulator solenoid valve.

The pump is lubricated and cooled by the fuel itself.
The 3

rd

 impeller cut-off solenoid valve (78015) serves to

increase the part of fuel oil that lubricates the radialjet pump,

it is used above 4200 rpm (when power is no longer needed)

and keeps the intake valve open also when the cylinder is

compressing. It sends one third of the capacity of the high

pressure pump back to low pressure.
The  on-off  time  is  considerably  lower  than  conventional

injection pumps.
The control solenoid valve is connected to pins 20 and 21

of connector A of the control unit.

TECHNICAL VIEW AND CROSS SECTION OF HIGH PRESSURE PUMP

1. Cylinder - 2. Cam - 3. Plate inlet valve - 4. Ball delivery valve - 5. Piston - 6. Pump shaft - 7. Low pressure fuel inlet -

8. High pressure fuel delivery - 9. Fuel backflow

2

7

6

9

8

1

5

3

4

6

1

5

2

Figure 148

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High-pressure pump (F1A engine)

This pump is similar to the 8140 engine one.
It differs in Rail line pressure, modulated at between 250 and

1600 bars by the electronic centre by acting on the pressure

regulator electro valve and is not provided with a 3rd pump

cutout electro valve (78015).
Pump (3) is oriented on the pump shaft cam.
During aspiration the pump is powered via supply conduit

(5).

The amount of fuel to be sent to the pump is set by pressure

regulator (7).
The pressure regulator stops fuel inflow to the pump based

on PWM input from the centre.
During  pump  compression,  fuel  reaches  a  pressure  level

sufficient to open the pressure valve to common rail (2), and

supplies it via output (1).

1. Output for rail pressure Ć 2. Rail pressure valve Ć 3. Pump Ć 4. Pump shaft Ć 5. Pump supply conduit Ć 6. Pressure

regulator supply conduit Ć 7. Pressure regulator Ć 8. High pressure pump Ć 9. Fuel input connection from filter - 10. Fuel

output connection to filter support - 11. Fuel input connection from centre heat exchanger - 12. Fuel output connection

from mechanical pump to filter - 13. Supply mehanical pump

1

2

3

4

5

6

7

1

8

7

9

10

11

12

13

Figure 149

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