Iveco Stralis AT/AD. Manual — part 208
122
WHEEL GEOMETRY
S
TRALIS
AT/AD
Base - January 2003
SUSPENSIONS
1
S
TRALIS
AT/AD
SECTION 9
5004
Suspensions
Page
SUSPENSIONS
3
. . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION
3
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Mechanical front suspension
3
. . . . . . . . . . . . . . .
- Pneumatic front suspension
3
. . . . . . . . . . . . . . .
- Pneumatic rear suspension
3
. . . . . . . . . . . . . . . .
- Rear mechanical suspension
3
. . . . . . . . . . . . . . .
SPECIFICATIONS AND DATA
4
. . . . . . . . . . . . . .
MECHANICAL FRONT SUSPENSION
ASSEMBLY DRAWING
14
. . . . . . . . . . . . . . . . . .
REAR MECHANICAL SUSPENSION ASSEMBLY
18
“CANTILEVER” REAR SUSPENSION
(vehicles 6X2)
20
. . . . . . . . . . . . . . . . . . . . . . . . .
- Procedure for assembly of the slipper block and
mounting brackets for the longitudinal bars
20
. . .
- Tightening the U-bolts clamping the leaf spring
to the central pivot
20
. . . . . . . . . . . . . . . . . . . . . .
- Removing the central support
21
. . . . . . . . . . . . .
- Removing the central support shaft
21
. . . . . . . . .
- Replacing the bracket
21
. . . . . . . . . . . . . . . . . . . .
- Replacing the half bearings
21
. . . . . . . . . . . . . . . .
- Reassembling the bracket
22
. . . . . . . . . . . . . . . . .
- Reassembling the central support shaft
23
. . . . . . .
- Reassembling the central support
23
. . . . . . . . . . .
- Front shock absorbers
25
. . . . . . . . . . . . . . . . . . .
- Additional axle shock absorbers
26
. . . . . . . . . . . .
- Rear shock absorbers
27
. . . . . . . . . . . . . . . . . . . .
AIR SUSPENSION
28
. . . . . . . . . . . . . . . . . . . . . . . .
- Chassis frame lifting, lowering and self-levelling
with remote control
28
. . . . . . . . . . . . . . . . . . . . .
- Saving Levels
28
. . . . . . . . . . . . . . . . . . . . . . . . . .
AIR SUSPENSION SYSTEM DIAGRAMS
29
. . . . . . .
Page
- Rear air suspension main diagram
for 4X2P vehicles
29
. . . . . . . . . . . . . . . . . . . . . . .
- Working diagram of pneumatic rear suspensions
for 4x2T/P tractors
30
. . . . . . . . . . . . . . . . . . . . . .
- Suspension diagram for tractors and cabin
vehicles 4x2T/FP
31
. . . . . . . . . . . . . . . . . . . . . . .
- Working diagram of air suspensions
for 6x2Y/FP/FS-D/FP-D vehicles
32
. . . . . . . . . . . .
- Working diagram of air suspensions
for 6x2Y/FP/FS-D/FP-D vehicles
(without lifting the additional axle)
33
. . . . . . . . . .
- Working diagram of air suspensions
for 6x2Y/FP/FS-CM vehicles
34
. . . . . . . . . . . . . . .
- Working diagram of air suspensions
for 6x2Y/FP/FS-CM vehicles
(without lifting the additional axle)
35
. . . . . . . . . .
- Working diagram of rear air suspensions
for 6x2Y/PT vehicles
36
. . . . . . . . . . . . . . . . . . . .
- Working diagram of rear air suspensions
for 6x2Y/PT vehicles
(without lifting the additional axle)
37
. . . . . . . . . .
- Working diagram of rear air suspensions
for 6x2Y/PS vehicles
38
. . . . . . . . . . . . . . . . . . . . .
- Working diagram of rear air suspensions
for 6x2Y/PS vehicles
(without lifting the additional axle)
39
. . . . . . . . . .
- Working diagram of air suspensions
for 6x2TX/P vehicles
40
. . . . . . . . . . . . . . . . . . . .
- Working diagram of pneumatic rear suspensions
for 6x4 TZ/P vehicles
41
. . . . . . . . . . . . . . . . . . . .
CHARACTERISTICS AND DATA
42
. . . . . . . . . . . .
- Pneumatic System
42
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MAIN COMPONENTS OF THE PNEUMATIC
SYSTEM
43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Controlled pressure valve
43
. . . . . . . . . . . . . . . . .
- Fault Diagnosis
43
. . . . . . . . . . . . . . . . . . . . . . . . .
- Level sensor
43
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Electro-Pneumatic Control Valve
44
. . . . . . . . . . .
- Load detector pressure sensor
45
. . . . . . . . . . . . .
2
SUSPENSIONS
S
TRALIS
AT/AD
Base - January 2003
- Low air pressure switch
45
. . . . . . . . . . . . . . . . . .
- Air spring
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- ECAS Control Unit
45
. . . . . . . . . . . . . . . . . . . . .
FAULT DIAGNOSIS
46
. . . . . . . . . . . . . . . . . . . . . .
- Diagnosis Instruments
46
. . . . . . . . . . . . . . . . . . . .
- Cluster Diagnosis
47
. . . . . . . . . . . . . . . . . . . . . . .
TOOLS
52
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
56
. . . . . . . . . . . . . . . . . .
- Mechanical front suspension
56
. . . . . . . . . . . . . . .
- Pneumatic front suspension
57
. . . . . . . . . . . . . . .
- Pneumatic front suspension with bars
58
. . . . . . . .
- Central added axle pneumatic suspensions
6x2 C vehicles
59
. . . . . . . . . . . . . . . . . . . . . . . . .
- Pneumatic rear suspension
4x2 — 6x2 C vehicles
60
. . . . . . . . . . . . . . . . . . . .
- Pneumatic rear suspension
6x2 P/PT/FT vehicles
61
. . . . . . . . . . . . . . . . . . . .
- Pneumatic rear suspension
6x2 P/FP/FS vehicles
62
. . . . . . . . . . . . . . . . . . . . .
- Pneumatic rear suspension
6x2 P/PS vehicles
63
. . . . . . . . . . . . . . . . . . . . . . .
- Pneumatic rear suspension
6x4 P vehicles
64
. . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL-REFITTING OF FRONT LEAF SPRING
65
- Removal
65
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
65
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVING-REFITTING FRONT SUSPENSION
BARS
66
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Removing longitudinal bars
66
. . . . . . . . . . . . . . . .
- Removing transverse bar
66
. . . . . . . . . . . . . . . . .
- Refitting
66
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REAR SUSPENSIONS
67
. . . . . . . . . . . . . . . . . . . . .
- Removal
67
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
67
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVING-REFITTING THE REAR AXLE
LONGITUDINAL SUSPENSION ARM
68
. . . . . .
Page
REMOVING-REFITTING THE REAR ADDED
AXLE LONGITUDINAL SUSPENSION ARM
68
.
REMOVING-REFITTING THE REAR AXLE
TRIANGULAR SUSPENSION ARM
68
. . . . . . . .
REMOVING-REFITTING THE REAR ADDED
AXLE TRIANGULAR SUSPENSION ARM
68
. . .
- Removal
68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING THE SUSPENSION
ARM FLEXIBLE PIN
69
. . . . . . . . . . . . . . . . . . . . .
- Removal
69
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
69
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STABILIZER BAR
70
. . . . . . . . . . . . . . . . . . . . . . . . .
FRONT STABILIZER BAR
70
. . . . . . . . . . . . . . . . . .
CENTRAL ADDED AXLE STABILIZER BAR
(6x2 C vehicles)
70
. . . . . . . . . . . . . . . . . . . . . . .
REAR STABILIZER BAR
70
. . . . . . . . . . . . . . . . . . . .
REAR ADDED AXLE STABILIZER BAR
(6x2P vehicles)
70
. . . . . . . . . . . . . . . . . . . . . . . .
- Removal
70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RUBBER BUSHINGS
73
. . . . . . . . . . . . . . . . . . . . . .
- Replacing front stabilizer bar rubber bushings
73
. .
- Replacing rear stabilizer bar rubber bushings
73
. .
SHOCK ABSORBERS
74
. . . . . . . . . . . . . . . . . . . . .
- Removal-refitting
74
. . . . . . . . . . . . . . . . . . . . . . .
- Front axle shock absorbers
(6x2 C vehicles)
74
. . . . . . . . . . . . . . . . . . . . . . . .
- Central added axle shock absorbers
74
. . . . . . . . .
- Rear axle shock absorbers
74
. . . . . . . . . . . . . . . .
- Rear added axle shock absorbers
(6x2 P vehicles)
74
. . . . . . . . . . . . . . . . . . . . . . . .
- Removal
74
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
74
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHASSIS FRAME ADJUSTMENT
75
. . . . . . . . . . . .
The vehicle’s suspension, depending on the version, may be:
- pneumatic
- mixed (front mechanical and rear pneumatic)
- mechanical.
Mechanical front suspension
The front suspension comprises:
D
double-acting hydraulic shock absorbers;
D
stabilizer bar;
D
parabolic leaf springs
Pneumatic front suspension
The front suspension comprises:
D
double-acting hydraulic shock absorbers;
D
stabilizer bar;
D
parabolic leaf springs and air springs (for Full
Pneumatic vehicles and for the central added axle of
the 6x2C vehicles only);
D
air springs with longitudinal bars (only for vehicles
6x2P mobile boxes CM).
Pneumatic rear suspension
The rear suspension comprises:
D
stabilizer bars;
D
double-acting hydraulic shock absorbers;
D
air springs.
Rear mechanical suspension
The rear suspension consists of:
D
hydraulic shock absorbers with double effect;
D
stabilising bar;
D
parabolic leaf springs (cantilever type only for vehicles
6x2).
DESCRIPTION
SUSPENSIONS
3
S
TRALIS
AT/AD
5004
SUSPENSIONS
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