Iveco Stralis AT/AD. Manual — part 207
Figure 22
71743
Fit the rule (4) on the front wheels, checking the slide (2) is
exactly in the middle of the two annular grooves of the shaft (3).
Fit the measuring units on the rear wheels as described above
for the wheels of the front axle.
Project the light signal on the rule (1) and note down the value
shown.
Repeat this measurement on the other wheel and check that
the value shown is the same as the one noted down; if it is not,
thoroughly check over the assembly of the rear axle on the
vehicle: if you find no trouble, check the chassis has not lost its
shape, following the procedures described in the ”Bodywork
- Chassis” section.
38671
Figure 23
VEHICLE WHEEL GEOMETRY WITH
CENTRAL ADDED AXLE (6X2 C)
Figure 24
Figure 25
Detach the swivel head (2) of the rear longitudinal tie rod (3)
from the steering lever (1) of the central axle with the
extractor 99347068.
38657
38658
Lift the vehicle, position the oscillating plates (1 and 4) of the
device 99305123 under the wheels of the steering axles,
locking them with the specific clamps (2) and place the boards
(3) under the rear wheels.
Provisionally fit the swivel head (2) back onto the lever (1) and
screw down the fixing nut without fully locking it.
!
Check the distance between the centre distances of
the swivel heads of the tie rod (3). It must be
832
±10 mm. If it is not, loosen the screw fixing the
collar and turn the tie rod (3) appropriately.
Checking rear axle alignment
.
118
WHEEL GEOMETRY
S
TRALIS
AT/AD
Base - January 2003
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
38659
Check front axle wheel geometry using device 99305123 (1)
according to procedure described and illustrated for 4X2
vehicles.
71745
After checking and adjusting the toe-in, if necessary, set the
wheels straight and check the steering box is in the ”steering
centre” position, that is the notch
⇐ of the shaft (1) coincides
with the notch
⇒ of the steering box (2).
84603
Lock the steering wheel with the tool (1).
Check that the distance between the centre distances of the
swivel head (1) and of the fork (5) of the middle longitudinal
tie rod (3) is 2159
±2 mm.
If this is not so, disconnect the swivel head (1) from the lever
(2) with the extractor, loosen the collar (4) and turn the tie
rod (3) appropriately to get the required distance; then, fit the
swivel head (1) back onto the lever (2).
71746
Each turn of the tie rod (3) corresponds to a change
in its length of 0.75 mm.
!
Disconnect the swivel heads (1, Figure 29) from the steering
lever (2, Figure 29) from the central axle.
Fit the light cluster (1) of the device 99305123 onto the
wheels of the central axle, repeat the checks and, if necessary,
adjust the toe-in as done for the front axle.
38663
WHEEL GEOMETRY
119
S
TRALIS
AT/AD
Figure 31
Figure 32
Figure 33
With the wheels straight and the steering box in the ”steering
centre” position, check that the pin of the swivel head (2) goes
exactly into the tapered hole of the lever (1). If it does not,
loosen the collar (3) fixing the swivel head to the tie rod and
turn the swivel head appropriately to achieve the above
condition.
In this way, the wheels of the central axle will be aligned with those
of the front axle (permitted alignment tolerance 0
0.5 mm).
Fit the swivel head back onto the respective lever permanently
by tightening the nuts to the required torque.
38664
Figure 34
After resetting the graduated sectors on the pointers of the
oscillating plates (1), turn the wheels so that the left front
wheel is positioned on the internal steering angle and check
that the other wheels are turned by the required angle.
Repeat the check on the steering angles, positioning the left
front wheel on the external steering angle.
38665
Checking steering angles
Vehicle wheel geometry with steering rear
added axle and pneumatic lifting
38666
Lift the vehicle, position the oscillating plates (1) of appliance
99305354 under the wheels of the steering axles, locking the
plates with the clamps (2) and place the boards (3) under the
wheels of the rear axle.
Check the wheel geometry of the front axle with appliance
99305354 according to the procedure described and illus-
trated for 4x2 vehicles.
After making the check and any adjustment of the toe-in, set
the wheels straight.
With the steering housing in the ”drive centre” position, apply
the optical assembly of the appliance 99305354 to the wheels
of the rear added axle.
Lift the added axle and adjust the wheel rims; lower the added
axle.
Check the wheel toe-in of the third axle as described for the
front axle of the 4x2 vehicles.
Finding a different value to the one given in the characteristics
and data table, adjust the toe-in as follows.
38667
120
WHEEL GEOMETRY
S
TRALIS
AT/AD
Base - January 2003
Figure 35
50946
Loosen the collars (1) fixing the swivel heads (2) at the ends
of the transverse tie rod (3) and turn this to accomplish the
required wheel toe-in.
Continue checking the camber, kingpin angle, caster and
steering angle as described for the 4x2 vehicles.
WHEEL GEOMETRY
121
S
TRALIS
AT/AD
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст