Iveco Daily Euro 4. Manual — part 32
5450
LUBRICATION
General
The engine is lubricated by forced circulation performed by the
following parts:
- An oil gear pump is incorporated in an assembly that also
includes the vacuum pump (GPOD).
- A pressure control valve incorporated in the crankcase.
- A Modine-type heat exchanger with built-in safety valve.
- A double filtration oil filter with built-in safety valve.
Operation (see Figure 247).
Engine oil is drawn up from the sump by the oil pump (3)
via the suction strainer (2) and delivered under pressure to
the heat exchanger (5) where it is cooled.
The oil continues through the oil filter (6) and goes to
lubricate the relevant parts through ducts or pipes.
At the end of the lubrication cycle, the oil returns to the
sump by gravity. The oil filter can be excluded by the safety
valve built into it if it gets clogged. The heat exchanger is
also excluded by a safety valve if it gets clogged.
In addition, the lubrication oil supplies the hydraulic
automatic tightener (7) of the camshaft drive (8).
To the oil pressure sensor
108337
Oil under pressure
Oil in freefall
Coolant
Breather on pressure control valve
Figure 247
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DIAGRAM OF GPOD ASSEMBLY ON ENGINE
1. Vacuum pump — 2. Oil pump — 3. Crankshaft —
A. Vacuum pump oil supply hole.
Clearance between the crankshaft gear teeth and the oil
pump drive gear 0.003
÷ 0.2 mm.
The assembly must not be overhauled; in the event of
defective operation, it must be replaced.
75517
Figure 248
Figure 249
OIL VACUUM PUMP ASSEMBLY (GPOD)
The oil pump (3) is a gear pump driven directly by the
crankshaft.
75516
503010
Oil pump
Characteristic data
transmission ratio
1.15
displacement
16.2 cm
3
pumping diameter
49.5 mm
number of teeth
7
height
11
oil pump minimum speed
862 rpm
oil pump max. speed
4485 rpm
oil pump over-revs
5247 rpm
oil pump forced over-revs
6279 rpm
speed
2500 rpm
torque
2.1 Nm
power draw (calc.)
550 W
Vacuum pump
The vacuum pump (2, SENZA CODICE), with radial blades,
is also incorporated in the GPOD (1, Figure 249). It is driven
directly by the oil pump.
transmission ratio
3.25
displacement
86 cm
3
volume to drain
4.5 litres
volume to drain with EGR
9 litres
chamber diameter
65 mm
rotor diameter
50 mm
cam
7.5 mm
number of blades
3
height
34 mm
vacuum pump minimum speed
994 rpm
vacuum pump max. speed
5168 rpm
vacuum pump over-revs
6046 rpm
vacuum pump forced over-revs
7235 rpm
theoretical flow rate at minimum (air)
85.5 l/min
actual flow rate at minimum (air) —
at atmospheric pressure
46 l/min
Theoretical speed at max. speed — (air) 444.4 l/min
Actual flow rate at max. speed — (air)
at atmospheric pressure
60 l/min
measured power draw (maximum)
speed
2500 rpm
torque
2.1 Nm
power draw (calc.)
550 W
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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)
750 (862)
12
3900 (4485)
68
Oil temperature: 100
°C — engine speed 750 rpm
(pump speed 994 rpm)
tank
(litres)
vacuum
(bar)
0.5
0.8
4.5
4.5
12.5
5.6
time (sec)
6.0
16.5
9
(
)
9.0
24.0
CROSS-SECTION OF OIL PRESSURE CONTROL
VALVE MOUNTED IN CRANKCASE
Valve removed from crankcase L = 51.75 mm.
Valve fitted in crankcase L = 50.75 mm.
Start of opening 4 bar L = 49.5
maximum opening 4.6 bar L = 44.
75520
Figure 250
Figure 251
Figure 252
543070
Oil filter
75521
Figure 253
PARTS COMPRISING THE OIL PRESSURE
CONTROL VALVE
1. Split ring — 2. Washer — 3. Spring — 4. Valve —
5. Valve casing.
75522
MAIN DATA OF THE OIL PRESSURE CONTROL
VALVE SPRING
Oil filter with single filtration with built-in by-pass valve —
opening pressure 2.5
± 0.3 bar.
543110
Modine heat exchanger
75524
Figure 254
Thoroughly clean the heat exchanger (1).
Always change the seals (2 and 4).
Built-in safety valve (3).
Opening pressure
0.82 - 1.03 bar
543475
Oil pressure control valve
No. of heat exchanger elements:
-
6 (96/116 HP engine)
-
8 (136 HP engine).
108539
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4
Figure 255
540480
Oil vapour recirculation system
Description
The oil vapours formed in the sump while the engine is
running, passing through the overhead cover, are channelled
into the separator / condenser filter known as the blow-by.
The filter is structured in two sections:
- The first one with a labyrinth, where most of the vapours
are condensed and return to the sump through an
umbrella outlet valve.
- The second one includes a coalescence filter that
condenses the remaining vapours that return to the
sump through another umbrella valve.
The portion of vapour that has not condensed is sent, via a
MANN-HUMMEL valve, to the intake duct and burnt during
normal engine operation.
75525
OIL VAPOUR RECIRCULATION DIAGRAM
1. MANN-HUMMEL valve — 2. Umbrella valves — 3. Blow-by filter — A. Labyrinth — B. Intake oil
vapour recovery flow — C. Oil return flow into sump — D. Flow of oil vapours from the sump —
E. Flow of oil vapours from the overhead — F. Coalescence filter.
The blow-by filter cannot be taken apart and must
therefore be replaced entirely.
NOTE
F1A ENGINE
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