Iveco Daily. Manual — part 276
6
FRONT AND REAR MECHANICAL SUSPENSIONS
D
AILY
Steering knuckle nuts or fastening ring nuts loose
(vehicles with torsion bar suspension).
Check and tighten nuts and fastening ring nuts to driving
torque.
NO
YES
Stabilizer bar spring bushes worn.
Replace spring bushes.
NO
YES
Stabilizer bar fastening screw nuts loose.
Check and tighten to torque.
NO
YES
Suspension fastening nuts and screws loose.
Check and tighten suspension fastening nuts and screws
to torque.
NO
YES
Torsion bar toothing worn.
Detach torsion bars and replace them and adjust
pre-loading.
NO
YES
Toothing of torsion bar rear supports or of wishbones
worn.
Replace rear support or upper wishbones and adjust
torsion bar pre-loadings.
NO
YES
Leaf spring supports loose.
Check the supports and replace chassis fastening
screws or rivets if they are loose.
Leaf spring pack loose for central fastening pin failure.
Overhaul leaf springs and replace central pin and its
self-locking nut.
NO
YES
YES
(Continues)
FRONT AND REAR MECHANICAL SUSPENSIONS
7
D
AILY
Leaf spring pack loose for spring fixing brackets
fastening rivets failure.
Check leaf spring fixing brackets and replace fastening
rivets.
YES
2
THE VEHICLE TENDS TO DRIFT
TO ONE SIDE
Tyre pressure low or incorrect.
Check and accurately inflate tyres to the prescribed
pressure.
Replace the wheel hubs.
Incorrect front wheel geometry.
Too much front wheel bearing play.
Check and correct wheel geometry.
NO
YES
NO
YES
NO
YES
Inefficient hydraulic shock absorbers.
Torsion bar broken.
Remove shock absorbers and replace them.
Replace torsion bar and adjust pre-loading.
NO
YES
NO
YES
Incorrect torsion bar pre-loading adjustment.
Check and adjust torsion pre-loading.
YES
Leaf spring broken.
Overhaul the leaf spring and replace if necessary.
NO
YES
(Continues)
8
FRONT AND REAR MECHANICAL SUSPENSIONS
D
AILY
Incorrect vehicle loading.
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
Base - May 2004
Front mechanical suspensions
Page
DESCRIPTION
11
. . . . . . . . . . . . . . . . . . . . . . . . . .
ARTICULATED QUADRILATERAL SUSPENSION
WITH TRANSVERSE LEAF SPRING
11
. . . . . . .
SPECIFICATIONS AND DATA
12
. . . . . . . . . . . . .
- Front leaf spring
12
. . . . . . . . . . . . . . . . . . . . . . . .
- Front suspension stabilizer bar (axle 5817)
13
. . .
- Front shock absorbers
14
. . . . . . . . . . . . . . . . . . .
TOOLS
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VEHICLE SUSPENSIONS 29 L - 35 S WITHOUT
SWAY BAR
15
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Shock absorber data
15
. . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
16
. . . . . . . . . . . . . . . . .
- Vehicles 29 L - 35 S (without sway bar)
16
. . . . .
TIGHTENING TORQUES
17
. . . . . . . . . . . . . . . . .
- Vehicles 29 L - 35 S
17
. . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
18
. . . . . . . . . . . . . . . . .
- Vehicles 35 C
18
. . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUES
19
. . . . . . . . . . . . . . . . .
- Vehicles 29 L - 35 S - 35C
19
. . . . . . . . . . . . . . . .
REPAIRS
20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Check the clearance of upper swinging arm
articulated head
20
. . . . . . . . . . . . . . . . . . . . . . . .
- Check the clearance of lower swinging arm
articulated head
21
. . . . . . . . . . . . . . . . . . . . . . . .
OVERHAULING THE SUSPENSION
21
. . . . . . . . .
- Suspension arms
21
. . . . . . . . . . . . . . . . . . . . . . .
- Removal
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Replacing suspension arm bushings
21
. . . . . . . . .
- Disassembly
21
. . . . . . . . . . . . . . . . . . . . . . . . . . .
- Assembly
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STABILIZER BAR
23
. . . . . . . . . . . . . . . . . . . . . . . . .
- Removal
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT SHOCK ABSORBERS
23
. . . . . . . . . . . . . .
- Removal
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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