Torsion Bar Preload Adjustment - Iveco daily euro 4 Repair Manual

50
FRONT MECHANICAL SUSPENSIONS
Figure 79
Refit the tie rod (6) to the lever (3) without tightening to
torque the nut for screw (7); connect the articulated head
(4) of the steering box tie rod to the stub axle lever and
tighten the nut to the specified torque.
Connect the shock absorber with the screw (5) and the nut
(1) and tighten the latter to the specified torque.
Refit wheels, fit nut protection and tighten the fastening nuts;
remove stands and lower the vehicle.
Then tighten to the specified torque the following
components:
- wheel fastening nuts;
- nut and lock nut fastening the torsion bars to the
relevant levers;
- nuts for screws fastening the upper tie rods to the
relevant levers.
Adjust torsion bar preload as described in the following
paragraph.

Torsion bar preload adjustment

Figure 80
TORSION BAR PRELOAD CHECK DIAGRAM
H = mm, height from ground of side member upper edge
measured as close as possible to suspension connection area
RSC (Loaded radius):
- with 225/75R16 tyres, 345 mm with 2500 kg load
- with 7.00R16 tyres, 364 mm with 2000 kg load
Base - March 2006
Check whether tyre pressure is the specified one and then
using the proper gauge, check whether tyre tread depth is
almost the same on both wheels.
Measure on both vehicle sides the height (H) from ground
of side member upper edge - measured as close as possible
to suspension connection area
Height (H) shall correspond to the value specified in the
following table.
Figure 81
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If a different value is found, operate on the adjustment screw
(1) as required, taking into account that before performing
this operation the vehicle shall always be lifted from ground
with hydraulic jack to prevent screw damaging.
Once proper vehicle setup is obtained, lock the screw with
the lock nut (2).
Load on front
wheels wheels
(Kg)
1400
1500
1700
1800
1900
2100
2300
2400
20986
2500
D E
AILY
Tyres
225/75 R 16 7.00 R 16
672,0 691,0
665.6 684.6
652.6 671.6
646,0 665,0
639.4 658.4
626.1 645.1
612.8 631.8
606.1 625.1
599.5 618.5
Print 603.93.651
URO 4
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