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Iveco EuroCargo (12 to 26 t). Manual - part 153

URO

ARGO

ECTOR

12-26 t

FRONT AND REAR PNEUMATIC SUSPENSIONS

Base - February 2003

PART

TORQUE

(kgm)

Front pneumatic suspension (Models 120E..FP/130E..FP/150E..FP)

Rebound fastening screw nut

62.5

± 6.5

(6.25

± 0.65)

Spring brackets fastening screw nut

463.5

± 46.5

(46.35

± 4.65)

Spring to front mount fastening screw nut

336.5

± 33.5

(33.65

± 3.35

Spring to pad fastening screw nut

336.5

± 33.5

(33.65

± 3.35)

Rear pneumatic suspension (Models 110EL..P/120EL..P)

Front support to chassis fastening screw

250

÷ 306

(25

÷ 30.6)

Suspension arm to front mount fastening screw nut

435

÷ 530

(43.5

÷ 53)

Suspension arm to axle box fastening screw nut

819

÷ 1002

(81.9

÷ 100.2)

Upper and lower shock absorber fastening screw nut

119

÷ 146

(11.9

÷ 14.6)

* Axle box fastening U-bolt nut

425

÷ 440

(42.5

÷ 44)

Sway bar fastening nut

794

÷ 971

(79.4

÷ 97.1)

Panhard bar fastening screw nut

÷ 54

÷ 5.4)

Air spring lower fastening nut

435

÷ 530

(43.5

÷ 53)

Other flanged head fasteners with waxed nut:
M12x1,75 R80
M12x1,75 R100

÷ 69

÷ 101

(5.6

÷ 6.9)

(8.3

÷ 10.1)

U-bolts must be fastened diagonally in several times to ensure contact between adapter and axle before reaching
maximum specified torque.

Rear pneumatic suspension (Models: 120E..P-FP/130E..P-FP/150E..P-FP)

Reaction triangle to chassis fastening screw

352.5

± 32.5

(35.25

± 3.25)

Longitudinal arm bar fastening screw nut

418

± 42

(41.8

± 4.2)

Air spring support arm to air spring fastening screw nut

± 10

± 1)

Air spring to chassis fastening screw nut

± 9

(9.2

± 0.9)

Nut for screw fastening the air-operated spring support arm to the rear axle.

545

± 55

(54.5

± 5.4)

URO

ARGO

ECTOR

12-26 t

FRONT AND REAR PNEUMATIC SUSPENSIONS

Base - February 2003

TORQUE

(kgm)

Rear pneumatic suspension (Models: 180E..P)

Axle to air spring support arm fastening screw nut

845

 170

(84.5

17)

Reaction triangle to axle fastening screw

290

30

(29

 3)

Reaction bar fastening screw nut

418

 42

(42.6

 4.3)

Support arm to air spring fastening screw nut

100

 10

(10

 1)

Air spring to chassis fastening screw nut

 9

(9.4

 0.9)

Sway bar to spring support arm fastening pin nut

373.5

 37.5

(38

 3.8)

Sway bar support to chassis fastening screw nut (M16)

226.5

 22.5

(23

 2.3)

Sway bar support to chassis fastening screw nut (M12)

 9

(9.4

 0.9)

Connecting rod to chassis support fastening pin nut

359

 36

(36.6

 3.7)

Upper shock absorber fastening pin nut

118

 12

(11.8

 1.2)

Lower shock absorber fastening pin nut

187.5

 18.5 (18.7  1.9)

Reaction triangle to chassis support fastening screw

418

 42

(42.6

 4.3)

TOOLS

TOOL No.

DESCRIPTION

99305117

Pneumatic circuit check instruments

8 10

810

99321024

Wheel removal-refitting hydraulic trolley

99387050

Polyamide tube cutter

20437

Figure 16

Controlled-pressure valve

The limited return valve has two functions:

- It cuts off the reservoir compressed air flow supply when

the pressure drops under a certain value (calibrated) due
to failures or excessive consumption.

- It supplies the reservoirs as soon as the braking system

reaches a value ensuring perfect brake application.

Low pressure indicator

This pressure switch is located near the utility air reservoir on
the pneumatic suspension delivery tube.

52723

Figure 17

Figure 18

33987

This valve allows the passage of compressed air in the direc-
tion of the arrow on the valve body, preventing it from flow-
ing back.

793319

Check valve

78802

This components consists of a control solenoid valve and
two pneumatic distributors for managing both sides of the
axle. A calibrated hole is provided between the two outputs
to prevent pressure leakage between air springs and
consequent internal connection axle stabilisation.
The electro-pneumatic distributor is connected to the
system by means of a three-pole connector.

Figure 19

Electro-pneumatic front axle distributor for
4 x 2 FP vehicles

URO

ARGO

ECTOR

12-26 t

FRONT AND REAR PNEUMATIC SUSPENSIONS

Base - February 2003

78804

Operation

Front axle lifting

The ECU energises the solenoid valve supplying the
distributors via the air duct (11) from the reservoir and
energising the axle electro-pneumatic distributor solenoid
valve ”A” (Figure 24) to supply the first distributor, closes the
relief to atmosphere (3, Figure 24) and opens the air intake
(11, Figure 24) from the reservoir.
In this way, the air from duct (21, Figure 24) to duct (21)
supplies the axle air springs via ducts (22 and 23).

Front axle lowering

In this case, the ECU energises the solenoid valve supplying
the distributor, allowing the air to be relieved from the air
springs from duct (21) to duct (21, Figure 24) and opens the
air input (3, Figure 24), which is open because the axle
electro-pneumatic solenoid valve ”A”

(Figure 24) is

de-energised.

Self-leveling

The ECU, according to the position of the level sensors,
controls the front axle electro-pneumatic distributor
solenoid valve and the rear axle electro-pneumatic
distributor solenoid valves accordingly for lifting or lowering
in order to reach vehicle levelling or stored positions ”M1”
or ”M2”.

Figure 20

78803

Pneumatic connections
11 - from air reservoir
21 - from axle electro-pneumatic distributor
22 - to air spring on right-hand side
23 - to air spring on left-hand side

Electrical connections
6.1 - Solenoid valve power positive
6.2 - Negative
6.4 - Free

Figure 21

URO

ARGO

ECTOR

12-26 t

FRONT AND REAR PNEUMATIC SUSPENSIONS

Base - February 2003

Content .. 151 152 153 154 ..