Iveco Daily Euro 4. Manual — part 167

1

Main possible suspension defects

1

-

noisy suspension;

2

-

the vehicle tends to drift to one side;

3

-

excessive suspension flexibility;

4

-

excessive suspension stiffness.

Insufficient lubrication.

Lubricate carefully.

Wishbone spring bushes worn.

Detach wishbones and replace bushes.

Tie-rod articulated heads worn

(vehicles with torsion bar suspension).

Replace tie-rod articulated heads.

Shock absorbers noisy or inefficient.

Check and if necessary replace shock absorbers.

Wheel bearings worn and with excessive backlash.

Replace bearings or adjust backlash.

Wishbone articulated heads worn.

Replace wishbone articulated heads.

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

YES

(Continues)

NOISY SUSPENSION

FRONT AND REAR MECHANICAL SUSPENSIONS

5

D

AILY

E

URO

DIAGNOSTICS

FRONT AND REAR MECHANICAL SUSPENSIONS

6

FRONT AND REAR MECHANICAL SUSPENSIONS

D

AILY

E

URO

4

(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

E

URO

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)