Iveco Daily. Manual

50681

50682

50823

Figure 185

Figure 186

Figure 187

Figure 188

543110

6-element heat exchanger

Position the mounting (3) on the auxiliary member assembly
(5) so that the hole (

→) coincides with the centring pin (4).

Position the heat exchanger (2) on the mounting (3) and
constrain it to the auxiliary member assembly (5) with the
fitting (1).
Tighten the fitting (1) to the required torque.

On supplying heat exchanger (1) with air at 1 bar pressure,
verify that no leaks exist from oil flow side (2) and also from
water flow side.

Test conditions:

Oil type

SAE 30

Oil temperature at heat exchanger inlet

115

°C

Oil delivery

30 litres/min

Water temperature
at heat exchanger inlet

°C

Water delivery

20 litres/min

PERFORMANCE
Exchanged heat quantity

4.0 kW

Oil pressure drop

0.85 bar

Built-in safety valve (2)
Opening pressure

0.82

÷1.03 bars

Carefully clean support (2), heat exchanger (4) and fitting (5)
and particularly their oil ways.

Always replace seal rings (1 and 3).

50677

Lubricate sealing rings with engine oil and place them on oil
filter (2).

Screw oil filter on fittings (1, Figure 187) and tighten it with
tool 99360091 (1) to 25 Nm torque.

Before mounting the fitting (1), spread IVECO
sealant 1905683 onto its thread.

NOTE

ENGINES 8140.43R/B/S/N

AILY

Base - May 2004

Figure 189

Mount the auxiliary element assembly (2) fitting the gasket
in between. Tighten the fixing screws with a torque wrench
(3) to the prescribed torque.

5050

LUBRICATION

General

Engine lubrication is forced circulation type and its is per-
formed by the following components:

- gear oil pump built in accessory equipments group, a

pressure control valve built in rear cover of accessory
equipments group;

- a Modine type heat exchanger with built-in safety valve;

- a double-action oil filter with built-in safety valve.

Operation (see Figure 191)
Engine oil is sucked from sump by oil pump (8) through
suction strainer (9) and sent under pressure to heat
exchanger (4) where it is cooled.
Oil passes through oil filter (5) and conveyed to lubricate
concerned components through ducts or pipes.
Once lubrication cycle is achieved, oil returns to sump
by gravity. Oil filter can be cut out by built-in safety valve,
in case it is clogged. Also heat exchanger ,in case of
clogging, is cut out by a safety valve.

62073

Figure 190

540480

Oil vapour recycling system

OIL VAPOUR RECYCLING SYSTEM DIAGRAM

Oil vapours formed into oil sump during engine running, pass
through oil filler (1), are ducted into pipe (2) and then
collected into condenser (4) where condensed vapours are
drained into oil sump through pipe (5) and put into circulation
again.
Exceeding vapours, if any, are discharged into atmosphere
through pipe (3).

74950

As spares, the screws (1) are supplied with the
thread pre-treated with LOCTITE 506 sealant.
If they are reused, clean the thread thoroughly and
apply IVECO 1905683 sealant at the section
shown in the figure.

NOTE

To remove-check and refit the parts forming the oil
pump and oil pressure adjustment valve, see
”AUXILIARY MEMBER ASSEMBLY”.

NOTE

ENGINES 8140.43R/B/S/N

AILY

Base - May 2004

62183

Figure 191

LUBRICATING SYSTEM DIAGRAM
1. Oil delivery pipe to camshaft - 2. Main oil delivery pipe - 3. Acces-
sory equipments group with built-in oil pump seat - 4. ”Modine”
type water-oil heat exchanger - A. Oil delivery to engine - B. Oil suc-
tion from sump - 5. Double-action oil filter with built-in safety valve
for clogged filter cut out - 6. Vacuum pump - 7. Oil pressure control
valve - 8. Pump gears - 9. Oil suction strainer - 10. Oil spray nozzle
for piston crown cooling - 11. Oil drainage pipe from turbocharger
to crankcase - 12. Oil delivery pipe to turbocharger.

ENGINES 8140.43R/B/S/N

AILY

Base - May 2004

COOLING SYSTEM DIAGRAM
A. To the heater in the cab.
B. From the heater in the cab.

Exhaust valve opening

Figure 192

Description

The engine’s cooling system is the closed-circuit, forced
circulation type and comprises the following parts:

- an expansion tank whose plug has two valves

incorporated in it: an outlet (2) and an inlet (1) that
govern the pressure in the system;

- a coolant level sensor at the base of the expansion tank;

- an engine cooling module to dissipate the heat taken

from the engine by the coolant with the heat exchanger
for the intercooler;

- a heat exchanger to cool the lubricating oil;

- a centrifugal-type water pump built into the crankcase

onto which the electric fan is keyed;

- an electric fan comprising an electromagnetic coupling

on whose shaft turns an idle hub fitted with a mobile
metal plate and on which is mounted the fan.

Coolant temperature for:

- turning on the fan: 94

°C ± 2°C;

- turning off the fan: 80

°C ± 2°C;

- a 3-way thermostat governing coolant circulation.

Operation

The water pump driven by a the crankshaft via a poly-V belt
sends the coolant into the crankcase and with a greater head
into the cylinder head.
When the coolant temperature reaches and exceeds the
working temperature it causes the thermostat to open and
from here the coolant is sent to the radiator and cooled by
the fan.
The pressure inside the system due to the change in
temperature is governed by the outlet (2) and inlet valves
built into the expansion tank filler cap (detail A).

The outlet valve (2) has a twofold function:

- to keep the system slightly under pressure so as to raise

the boiling point of the coolant;

- to discharge into the atmosphere the excess pressure

generated in case of high temperature of the coolant.

The function of the inlet valve (1) is to permit transferring the
coolant from the expansion tank to the radiator when, inside
the system, a low pressure is produced due to the decrease
in volume of coolant as a result of its temperature lowering.
Outlet valve opening 1

± 0.1 kg/cm

Inlet valve opening 0.005

÷ 0.02 kg/cm

52172

ENGINES 8140.43R/B/S/N

AILY

Base - May 2004

COOLING

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Iveco Daily. Manual - part 28