Iveco Daily Euro 4. Manual — part 168
8
FRONT AND REAR MECHANICAL SUSPENSIONS
D
AILY
E
URO
4
Check the load and arrange it evenly over the loading
area.
YES
3
Leaf spring central pin broken.
Replace the component.
YES
Torsion bars yielded.
Replace torsion bars and adjust pre-loading.
NO
YES
Incorrect torsion bar pre-loading adjustment.
Check and adjust torsion bar pre-loading.
NO
YES
Shock absorbers inefficient.
Check and replace the shock absorbers if necessary.
NO
YES
Overhaul the spring and replace the unusable
components or, if necessary, the entire spring.
NO
YES
4
EXCESSIVE SUSPENSION STIFFNESS
Incorrect torsion bar pre-loading adjustment.
Check and adjust torsion bar pre-loading.
YES
EXCESSIVE SUSPENSION
FLEXIBILITY
Leaf spring leaves yielded or broken.
FRONT MECHANICAL SUSPENSIONS
9
D
AILY
E
PRINT 603.43.351/D
Front mechanical suspensions
Page
DESCRIPTION
11
. . . . . . . . . . . . . . . . . . . . . . . . . .
ARTICULATED QUADRILATERAL SUSPENSION
WITH TRANSVERSE LEAF SPRING
11
. . . . . . .
SPECIFICATIONS AND DATA
12
. . . . . . . . . . . . .
- Front leaf spring
12
. . . . . . . . . . . . . . . . . . . . . . . .
- Front shock absorbers
14
. . . . . . . . . . . . . . . . . . .
- Front stabilizer bar
14
. . . . . . . . . . . . . . . . . . . . . .
TOOLS
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
15
. . . . . . . . . . . . . . . . .
- Vehicles 29 L - 35 S
15
. . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
16
. . . . . . . . . . . . . . . . .
- Vehicles 35 C
16
. . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
17
. . . . . . . . . . . . . . . . .
- Vehicles 29 L - 35 S - 35C
17
. . . . . . . . . . . . . . . .
REPAIRS
18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Check the clearance of upper swinging arm
articulated head
18
. . . . . . . . . . . . . . . . . . . . . . . .
- Check the clearance of lower swinging arm
articulated head
19
. . . . . . . . . . . . . . . . . . . . . . . .
OVERHAULING THE SUSPENSION
19
. . . . . . . . .
- Suspension arms
19
. . . . . . . . . . . . . . . . . . . . . . .
- Removal
19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Replacing suspension arm bushings
19
. . . . . . . . .
- Disassembly
19
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Assembly
20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT SHOCK ABSORBERS
21
. . . . . . . . . . . . . .
- Removal
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
FRONT MECHANICAL SUSPENSIONS
D
AILY
E
URO 4
Page
LEAF SPRING
23
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Removal
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TORSION BAR SUSPENSION
Axle 5819 - vehicles 35C - 40C - 45C - 50C
25
.
- Description
25
. . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS AND DATA
26
. . . . . . . . . . . . .
- Front shock absorbers
26
. . . . . . . . . . . . . . . . . . .
- Stabilizer bar diameter
26
. . . . . . . . . . . . . . . . . . .
TOOLS
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
29
. . . . . . . . . . . . . . . . .
- Vehicles 35 C - 40 C - 45 C - 50 C
29
. . . . . . . .
REPAIRS
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Check the clearance of upper swinging arm
articulated head
31
. . . . . . . . . . . . . . . . . . . . . . . .
- Check the clearance of lower swinging arm
articulated head
32
. . . . . . . . . . . . . . . . . . . . . . . .
OVERHAULING THE SUSPENSION
33
. . . . . . . . .
TIE RODS
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Removal
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Replacing swivel heads
33
. . . . . . . . . . . . . . . . . . .
- Refitting
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TORSION BARS
34
. . . . . . . . . . . . . . . . . . . . . . . . .
- Removal
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Replacing silentbloc and limit stops
35
. . . . . . . . .
- Replacing link pins
35
. . . . . . . . . . . . . . . . . . . . . .
- Refitting
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Adjusting torsion bar pre-load
38
. . . . . . . . . . . . .
STABILIZER BAR
39
. . . . . . . . . . . . . . . . . . . . . . . . .
Page
- Removal
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT SHOCK ABSORBERS
39
. . . . . . . . . . . . . .
- Removal
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TORSION BAR SUSPENSION
Axle 5823 - vehicles 60C - 65C
41
. . . . . . . . . . .
- Description
41
. . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS AND DATA
42
. . . . . . . . . . . . .
- Front shock absorbers
42
. . . . . . . . . . . . . . . . . . .
- Stabilizer bar
42
. . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
43
. . . . . . . . . . . . . . . . .
EQUIPMENT
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPAIR OPERATIONS
46
. . . . . . . . . . . . . . . . . . . .
SUSPENSION OVERHAUL
46
. . . . . . . . . . . . . . . .
- Lower tie rod articulated heads replacement
46
.
TORSION BARS
46
. . . . . . . . . . . . . . . . . . . . . . . . .
- Removal
46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Rubber bush replacement
47
. . . . . . . . . . . . . . . .
- Removal
47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Torsion bar preload adjustment
50
. . . . . . . . . . . .
The front suspension has independent wheels of the type:
- with an articulated quadrilateral with a transverse leaf spring for axles 5817 and 5818;
- with longitudinal torsion bars for axle 5819 and 5823.
62102
Figure 1
ARTICULATED QUADRILATERAL SUSPENSION WITH TRANSVERSE LEAF SPRING
(vehicles 29l - 35s - 35c)
The suspension comprises:
- two top triangular suspension arms, composed of a sheet-metal shell, connected by elastic bushings to the crosspiece by pins
articulated to the stub axle;
- two bottom triangular suspension arms, composed of two sheet-metal half-shells welded together, connected by elastic
bushings with metal reinforcement to the crosspiece and pins articulated to the stub axle.
The bottom suspension arms have reaction points for the leaf spring and the bottom mountings of the shock absorbers;
- a single-blade leaf spring, made of composite material for axles 5817 mounted on vehicles 29 L and 35 S, steel for axles 5818
mounted on vehicles 35 C; the spring is kept inside the crosspiece by two top reaction plugs fitted on the ends of the spring
housed in the seats in the bottom suspension arms.
The steel leaf spring, due to the resistance it provides for the rolling movements of the vehicle, makes mounting the front
stabilizer bar superfluous;
- two double-acting hydraulic shock absorbers with integrated limit stops.
DESCRIPTION
FRONT MECHANICAL SUSPENSIONS
11
D
AILY
E
MECHANICAL FRONT SUSPENSIONS
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