4.8 STEERING GEOMETRY ADJUSTMENT
The correct steering geometry is given by the values
of the centre distance between the joints of the ten-
sion rod and the wheel connecting rod. Any faults
caused by knocks or accidents result in reduced
driving precision and increased wear on the tyres.
These can be overcome as follows:
– uneven or excessive wear on the front tyres =
toe-in adjustment
– the machine does not maintain a straight line
when the steering wheel is straight = adjustment
of tie-rods.
NOTE
Before any other action, check that the joint fasten-
ings have not become loose.
A) Toe-in adjustment
An exact toe-in is achieved with a centre distance of
515 mm which is measured between the centres of
the articulated joints
(1)
of the wheel connection rod
(2)
. If a different distance is found, dismantle one or
both the joints and screw or unscrew them on the rod
(6)
as much as necessary.
On assembly, fully tighten the locknuts
(3)
and the fas-
tening nuts
(4)
of the joints.
B) Adjustment of the steering wheel
Firstly check the toe-in (point “
A
”) and align the front
wheels.
If the steering wheel is not straight, dismantle the
articulated joint
(5)
and screw or unscrew it on the tie-
rod
(6)
as much as necessary.
On assembly, fully tighten the locknut
(7)
and the fas-
tening nut
(8)
and check that the tie-rod, in its travel,
does not interfere with parts or accessories of
the engine
even with the equaliser
(9)
angled in both
directions.
Tightening torques
3 - 7
Locknuts for articulated joints ....... 25 ÷ 30 Nm
4 - 8
Nuts for articulated joints .............. 45 ÷ 50 Nm
3/2002
9
7
5
8
6
1
3
2
4
515 mm
1
2
1
5
6
102 - 122
4.8
.
0
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