Iveco EuroCargo (12 to 26 t). Manual — part 23

70128

70127

70362

70125

70126

Figure 182

Figure 183

Figure 184

Figure 185

Figure 186

Complete engine refitting as follows:

Form the right side:

Refit the starter (5) to the flywheel housing (4) and tighten
the fastening nuts to the specified torque.

Fit the oil pipe (3) with a new sealing ring into the engine
block and secure it to the turbosupercharger (1) by the
screws (2) tightened to the specified torque.

Refit the bracket (2) including the fuel filter support (1) to the
engine block, tighten the screws (3) to the specified torque.

Screw manually the fuel filter to the support (1), screw the
filter by

¾ turn, connect the pipes (2-3-4) to the relevant

support connections (1) as shown in the following figure.

Press the clamp (1) as shown in figure B.
After disconnecting the pipe, reset the clamp (1) to the initial
locking position A, to prevent deformations.
When refitting is over, fill engine with the prescribed
lubricating oil in the specified quantity.

From the left side:

Connect the fuel pipe (2) to rail and to high pressure pump
(9), secure it by screws (4 and 6) tightened to the specified
torque.

!

Pipe connections (2) shall be tightened to 20 Nm
torque using the proper dynamometric wrench
99389834.
Connection (7) shall be tightened by holding at the
same time the high pressure pump hexagon (10).
When removed pipe (2) shall always be replaced.
Connect pipe (3) to connection (4) and air
compressor (8).

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82

ENGINE F4 AE 0481

Base - February 2003

70479

Figure 187

Forced lubrication is implemented by the following
components:

- rotor oil pump (5), set in the front part of the engine

block and controlled by the straight-tooth gear fitted on
the output shaft tang;

- water/oil heat exchanger (3) set in the engine block, with

oil filter support;

- oil pressure relief valve (1) built into filter support;

- by-pass valve (4) to cut out clogged oil filter, built into

filter support;

- cartridge oil filter (2).

LUBRICATION SYSTEM LAYOUT

1

2

3

5

4

Pressurised oil path

Oil return to sump
by fall

Oil inlet

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ENGINE F4 AE 0481

83

Base - February 2003

LUBRICATION

70576

Figure 188

Figure 189

1. Heat exchanger body with filter support - 2. Internal gasket - 3. Water-oil heat exchanger - 4. Gasket between heat

exchanger unit and engine block - 5. Oil pressure relief valve - 6. By-pass valve to cut out clogged oil filter.

Clean accurately the heat exchanger components

Always replace the sealing gaskets.

!

Since the oil pump cannot be overhauled, it shall be
replaced when damaged.

543010

OIL PUMP

543110

HEAT EXCHANGER

70480

5

6

1

2

3

4

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ENGINE F4 AE 0481

85

Base - February 2003

6432

70481

70482

Figure 190

Figure 191

Figure 192

MAIN DATA TO CHECK OIL PRESSURE RELIEF

VALVE SPRING

By-pass valve to cut out clogged oil filter.

Max blow-by:
22 cm

3

/1’ at 0.8 bar pressure and 26.7

°C temperature

Loosen the plug (1), withdraw the spring (3) and the relief
valve (4) from the support (5).
Check whether the valve (4) is not scored and is sliding
smoothly into its seat. The spring (3) shall not be broken or
yielded.
Pressure regulation at 100

°C oil temperature:

- 1.2 bar min pressure;
- 3.8 bar max. pressure

Flow

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ENGINE F4 AE 0481

Base - February 2003

Oil pressure relief valve