Iveco Daily. Manual

62578

- Loosen nut (1);
- apply 5 kg to plate (3) in point (2);
- start engine;
- disconnect the pneumatic actuator (4);
- with engine running at idle, depress the brake pedal

gradually until obtaining 100 bar pressure read on the
gauge set upstream connector. This value shall be constant
and shall be read on vehicle with load and without load;

- simulate the fully laden condition by lifting completely the

relay lever (3) and the unloaded condition by lowering the
lever completely;

- read output pressure value under both vehicle conditions

(laden and unloaded); obtained values shall comply with
those indicated on the plate, otherwise replace the load
sensing valve;

- operate the relay lever (3) to check whether the load

sensing valve piston is sliding smoothly into its seat,
otherwise replace the load sensing valve;

- reconnect the pneumatic actuator (4);
- load the vehicle to obtain 1500 kg weight on the rear axle

evenly distributed on the right and left side of the vehicle
with

± 5 kg tolerance;

- with engine running at idle and 100 bar pressure read on

the gauge set upstream the connector, check whether the
output pressure value read on the gauge set downstream
the connector is corresponding to the values indicated on
the plate, otherwise replace the load sensing valve;

- stop the vehicle, tighten nut (1) to the specified torque and

remove applied loads.

Figure 17

Bleed the system, loosen the screws (3) and disconnect the
pneumatic actuator (2).
Loosen the fastening screws of the load sensing valve (1) and
remove it including the pneumatic actuator (2).

Load sensing valve replacement
Removal

Figure 18

Figure 19

Refitting

Reverse removal operations to perform refitting.

Perform load sensing valve adjustment as shown in the
relevant paragraphs ”Load sensing valve adjustment
on vehicle”.

62433

Load sensing valve adjustment on vehicle

This device shall be checked and adjusted, if required, at
regular intervals by checking the values indicated on the plate
(Figure 18) located on the internal part of the engine hood.

Should the plate or the relevant technical data be
missing, ask the manufacturer for a duplicate
specifying the following:
- Vehicle type and wheelbase
- Rear axle weight
- Load sensing valve No.

Perform required operations in the following sequence:

- position the vehicle with the rear wheels set on the brake

test bed 99336914;

- connect gauges 99372269 or Modus to pressure control

intakes set upstream and downstream connector;

- should gauges not be fitted with valves for automatic

bleeding, bleed air by loosening the suitable ring nuts

Perform this check with gradually increasing pressure.

To check the load sensing valve, every braking system
component shall be in perfect operating conditions. When
replacing the leaf spring for special set-up, a new plate is
required with properly corrected values.

- when tests are over, check brake performance.

62577

LOAD SENSING VALVE PLATE

REAR AIR SUSPENSIONS

AILY

Base - May 2004

62365

Figure 20

Position the vehicle on level ground. Lift the rear part of the
vehicle and rest the chassis on the proper stands. Use the
hydraulic jack to support the rear axle.
Bleed the system, remove the wheel, loosen the air spring
lower fastening screw (1). Loosen shock absorber lower
fastening nut (3) and disconnect it.
Loosen nuts (2) and remove the U bolts (4) and the elements
securing the leaf spring to the rear axle.
Loosen and remove the pin (6) and remove the leaf spring (5).

Figure 21

Figure 22

62363

500450

LEAF SPRING

Removal

500940

REAR SHOCK ABSORBERS

Removal

Lift the rear part of the vehicle and use the jack to support the
rear axle. Loosen the upper (3) and the lower (1) fastening
nuts and remove the shock absorber (2).

Refitting

Reverse removal operations to perform refitting.

Refitting

Reverse removal operations to perform refitting.

Refitting

Reverse removal operations to perform refitting.

528960

REAR STABILIZER BAR

Removal

62364

Operate on both vehicle sides.
Loosen the screws (1) and the nut (3). Remove the stabilizer
bar (4) including the joints (2).

REAR AIR SUSPENSIONS

AILY

Base - May 2004

REAR SUSPENSION OVERHAUL

62368

Figure 23

PANHARD REACTION BAR
Removal

Refitting

Reverse removal operations to perform refitting.

Loosen the ”Panhard” reaction bar (4) fastening screws (3 and
5) and remove it.

Loosen the relay rod (2) fastening screws (1 and 6) and
remove it.

100

REAR AIR SUSPENSIONS

AILY

Base - May 2004

62351

62435

The VB - TECHNIEK system is controlled by an electronic
control unit that keeps the settings, depending on the signals
sent by the level sensors, in all working conditions.

A supply unit, which includes all the appliances, distributes and
discharges the air from the springs.

For vehicles with no ABS, there is a braking load apportioning
valve, governed by an air-operated actuator.

With each start, the control unit runs a test on all the system
components and when the handbrake is released it restores
the set driving position.

It is possible, with the vehicle stationary and the handbrake
engaged, to lift or lower the chassis frame. During these
operations, a red light on the dashboard warns of not being
in the driving position.

Suspension assembly diagram (for vehicles 35C - 40C - 45C - 50C)

AIR SUSPENSIONS TYPE VB-TECHNIEK (for vehicles 35C - 40C - 45C - 50C - 60C - 65C)
GENERAL INFORMATION

Figure 24

Figure 25

REAR AIR SUSPENSIONS

101

AILY

Base - May 2004

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Iveco Daily. Manual - part 299