Iveco Daily. Manual — part 106
F1A ENGINE
D
AILY
402
Base - May 2004
Figure 246
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
HYDRAULIC SYSTEM
The hydraulic system is composed of:
-
tank
-
pre-filter
-
electric supply pump
-
fuel filter
-
high pressure supply pump with supply pump built
inpressure regulator
-
manifold (rail)
-
electro-injectors
-
supply pipes and fuel recirculation
773010
Fuel pump
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.
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.
50707
CROSS-SECTION OF FUEL PUMP
F1A ENGINE
403
D
AILY
Base - May 2004
Figure 247
Fuel pipes
542011
Fuel filter
The fuel filter is composed of a cartridge (8) equipped with a
water separator (9).
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.
Heater support (3) has an integrated temperature sensor.
On heater support (3) there are screwed up sensor (1) to
signal filter clogging and non return valve (5).
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.
Check valve characteristics
opening pressure
0.5
bar
differential pressure less than 0.2 bar at 120 litres/h of fuel.
Clogging indicator characteristics
differential working pressure 1.1 bar
Tightening torques
1.
Tightening clogging signalling sensor
20
±2 Nm
4.
Water in signalling sensor
0.8
±1.2 Nm
5.
Check valve tightening
25
±2 Nm
8.
Fuel filter tightening
18
±2 Nm
10. Connector
35
±2 Nm
11. Connector
35
±2 Nm
12. Bleed screw
4 Nm
7.* Threaded insert
35
±2 Nm
*
Before mounting, apply thread holding down Loctite on
thread.
88613
+ 0.05
- 0.1
1. High-pressure pump supply pipe quick-coupling fitting —
2. Supply pipe quick-coupling fitting — 3. Fuel return pipe
quick-coupling fitting — 4. Fuel filter mounting.
If disconnecting the fuel pipes (1-2-3) from the mounting (4),
it is necessary, when refitting, to make sure their fittings are
perfectly clean. This is to avoid an imperfect seal and fuel
getting out.
75585
Figure 248
1. Clogging signalling sensor - 2. Temperature sensor connector - 3. Heater support - 4. Water in signalling sensor -
5. Overpressure valve - 6. Heater connector - 7. Bending insert - 8. Fuel filter - 9. Water separator - 10. Connector -
11. Connector - 12. Purging screw.
F1A ENGINE
D
AILY
404
Base - May 2004
85846
Figure 249
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. Mechanical feeding pump - 2. CP3 high pressure pump - 3. Pressure regulator A. To the tank - B. Return from rail -
C. Return from fuel filter - D. Delivery to rail - E. From tank - F. Return to injectors.
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
F1A ENGINE
405
D
AILY
Base - May 2004
High-pressure pump
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст