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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

F1A ENGINE

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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

pumping diameter

49.5 mm

number of teeth

height

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

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

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)

3900 (4485)

Oil temperature: 100

°C — engine speed 750 rpm

(pump speed 994 rpm)

tank

(litres)

vacuum

(bar)

0.5

0.8

4.5

12.5

5.6

time (sec)

6.0

16.5

(

)

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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F1A ENGINE

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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

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