Iveco Daily Euro 4. Manual — part 70
272
F1C ENGINE
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4
1. Oil pump - 2. Oil pressure adjusting valve -
3. Depressor.
88625
Figure 284
Figure 285
OIL PUMP/DEPRESSOR UNIT
SECTIONS OF OIL PUMP/DEPRESSOR UNIT
1. Oil input pipe from cylinder block - 2. Oil suction pipe -
3. Oil pressure adjusting valve - 4. Oil delivery pipe -
5. Depressor air suction pipe - 6. Depressor oil suction pipe.
88689
503010
Oil pump
Characteristic data
transmission ratio
1
displacement
23.52 cm
3
pumping diameter
49.5 mm
number of teeth
7
height
16 mm
oil pump minimum speed
780 rpm
oil pump max. speed
3500 rpm
oil pump over-revs
4200 rpm
oil pump forced over-revs
4900 rpm
speed
3500 rpm
torque
- Nm
power draw (calc.)
- W
Figure 286
SECTION B-B
Figure 287
SECTION A-A
88690
88691
Should the unit be faulty, not due to the oil
pressure adjusting valve, change the whole unit.
NOTE
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Oil temperature: 100
°C — closed recirculation —
max. outlet pressure 5 bars
engine speed rpm
(oil pump speed — rpm)
capacity (l/min)
780 (862)
3500 (4485)
-
88626
88627
88058
Figure 288
Figure 289
Figure 290
1. Valve - 2. Spring - A. Oil inlet duct from the sump -
B. Oil supply duct to the crankcase - C. Oil return duct
from the crankcase - D. Oil drainage port
Pressure at opening start:
4.4 bar
Description of oil pressure adjusting valve closed
If in pipe C the oil pressure is below 4.4 bar, the valve (1)
closes the holes D - E.
Oil pressure adjusting valve open
If in pipe C the oil pressure is equal or above 4.4 bar, the valve
(1), as a result of the pressure itself, wins through the spring
reaction (2) and goes down, thus opening communication
between the delivery pipe A and the suction pipe B, through
draining holes D-E, and therefore the pressure drops.
When the pressure falls below 4.4 bar, the spring (2) takes
the valve (1) to the initial position of closed valve.
Use the suitable wrench to remove the oil pressure adjusting
valve (1) from the oil pump.
Vacuum pump
The vacuum pump (2, Figure 284), with radial blades, is also
incorporated in the GPOD (1, Figure 285). It is driven directly
by the oil pump.
transmission ratio
1
displacement
150 cm
3
volume to drain
4.5 litres
chamber diameter
65 mm
rotor diameter
45.5 mm
cam
7.5 mm
number of blades
3
height
34 mm
vacuum pump minimum speed
780 rpm
vacuum pump max. speed
3500 rpm
vacuum pump over-revs
4200 rpm
vacuum pump forced over-revs
4900 rpm
theoretical flow rate at minimum (air)
- l/min
actual flow rate at minimum (air) —
at atmospheric pressure
- l/min
Theoretical speed at max. speed — (air)
- l/min
Actual flow rate at max. speed — (air)
at atmospheric pressure
- l/min
measured power draw (maximum)
speed
3500 rpm
torque
- Nm
power draw (calc.)
- W
543475
Oil pressure adjusting valve
Disassembly
274
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°C — engine speed 780 rpm
(pump speed 994 rpm)
tank
(litres)
vacuum
(bar)
0,5
0,8
4,5
4,5
12,5
9
9,5
26,0
88059
88060
88061
107752
Figure 291
Figure 292
Figure 293
Figure 294
PARTS COMPRISING THE OIL PRESSURE
CONTROL VALVE
1. Split ring — 2. Valve — 3. Spring — 4. Valve casing.
Use the suitable pliers to remove the snap ring (1), take off
the valve (4) and the spring (3) from the valve body (2).
MAIN DATA OF THE OIL PRESSURE CONTROL
VALVE SPRING
Oil filter with built in by-pass valve — differential opening
pressure 2.5
± 0.2 bar.
HEAT EXCHANGER COMPONENT DETAILS
1. Heat exchanger made up of five elements - 2. Gasket -
3. Box - 4. Pipe union - 5. Screw - 6. Oil filter support -
7. Oil pressure switch - 8. Screw - 9. Heat exchanger box -
10. Gasket.
Assembly
For refitting, reverse the removal operations.
543070
Oil filter
543110
Heat exchanger
Disassembly
Remove the screws (5) and take off the heat exchanger (1)
from the box (3) with the gasket (8).
Remove the screws (7) and take off the oil filter support (6)
from the box (3).
Assembly
For refitting, reverse the removal operations and observe the
following warnings.
Clean accurately the heat exchanger (1).
Always change the gaskets (2, 9 and 8). Apply LOCTITE 577
on the threading of the pipe union (4) (if removed), drive it
in the support (1) and tighten it to the prescribed torque.
Tighten the screws to the prescribed torque.
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