cod. F07011705
fig.12
fig.13
USE AND MAINTENANCE
ENGLISH
USE AND MAINTENANCE
ENGLISH
EN - 53
52 - EN
4.3 STABILITY OF IMPLEMENT AND TRACTOR
DURING TRANSPORT
When an implement is coupled to a tractor, so becoming an
integral part of it for the purposes of road travel, the stability
of the implement-tractor complex may change and cause
driving or operating difficulties (rearing up or side-slipping
of the tractor). The condition of equilibrium can be restored
by placing a sufficient number of ballasts on the front of
the tractor so that the weights on the two tractor axles are
distributed sufficiently evenly.
To work in safety the instructions given in the highway code
should be followed; these prescribe that at least 20% of
the weight of the tractor alone should be borne by the front
axle, at least 60% by the rear axle, and that the weight on
the arms of the hoist should not be more than 30% of the
weight of the tractor itself. These factors are summarized in
the following formulas:
In case of hooking behind the tractor (fig.12):
I
F
(min.)
= [
I
R
x (c + d)] - (
T
F
x b) + (0,2 x
T
E
x b)
(a + b)
In case of hooking in front of the tractor (fig.13):
I
F
(min.)
= [
I
R
x (c + d)] - (
T
F
x b) + (0,6 x
T
E
x b)
(a + b)
The symbols have the following meanings (please see Fig.
12 for reference):
T
E
(Kg)
Mass of unladen tractor (*).
T
F
(Kg) Front axle load of unladen tractor (*).
T
R
(Kg)
Rear axle load of unladen tractor (*).
I
R
(Kg)
Mass weighing on arms off hoist with full
load ( mass, see cap. 1.3 Identification).
I
F
(Kg) Total mass of ballast.
a
(m) Horizontal distance between the centre of gravity of
the ballast and the front axle (fig.12) / posterior axle
(fig.13) of the tractor.
b
(m) Tractor wheelbase, that is, the horizontal distance
between the tractor axles.
c
(m) Horizontal distance between the inferior point of
attachment of the equipment and the posterior axle
(fig.12) / front axle (fig.13) of the tractor (equipment
supported to the ground).
d
(m) Horizontal distance between the barycentre of the
equipment and the inferior point of attachment of the
equipment (equipment supported to the ground).
(*) See instruction handbook of the tractor.
REAR HITCH
FRONT HITCH
The amount of ballast that should be applied according to the
formula is the minimum required for circulation on the road.
If for reasons of tractor performance or to improve the set-up
of the implement during operation it is thought necessary to
raise these values, please refer to the registration document
of the tractor to check its limits.
When the formula for calculating the ballast gives a negative
result it will not be necessary to add any weight. In any case,
as long as the limits of the tractor are respected, a suitable
quantity of weights may be applied in order to ensure gre
-
ater stability during travel. Check that the tractor tyres are
suitable for the load.
Summary of Contents for BISONTE 220
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