Adjusting The Hydraulic System; The Stability Of The Equipment In Road Traffic - Maschio GASPARDO Empleo Y Mantenimiento

3.4 ADJUSTING THE HYDRAULIC SYSTEM

Hydraulic system safety precautions:
1) At the moment of connecting the hydraulic tubes to the hydraulic sy-
stem of the tractor, make sure that the hydraulic systems of the operating
machine and the tractor are not under pressure.
2) For the operative hydraulic connections between tractor and operating
machine, the sockets and plugs should be marked with colours to distin-
guish them, to avoid them being used wrongly. There would be a danger
of accident if the connections were to be swapped round.
3) The hydraulic system is under high pressure; because of the accident
risk, when searching for leakage points special auxiliary instruments
should be used.
4) Not to never carry out the search losses with the fingers or the hands.
The liquids that exit from the holes can be nearly not visible.
5) During transport by road the hydraulic connections between tractor and
operating machine should be disconnected and secured to the support
provided.
6) Do not use vegetable oils under any circumstance. These could cause
a risk of damage to the cylinder gaskets.
7) The operating pressures of the hydraulic system should be between
100 bars and 180 bars.
8) Never exceed the indicated hydraulic system pressure levels.
9) Check that the quick hook-ups are coupled correctly; parts of the system
could get damaged if they are not.
10) Oil escaping at high pressure can cause skin injury with the risk of
serious wounds and infection. Call a doctor immediately if such an incident
occurs. If the oil with surgical means is not removed quickly, can take place
serious allergies and/or infections. Therefore, the installation of hydraulic
components in the tractor driver's cab is strictly forbidden. All the compo-
nents of the system should be positioned carefully to avoid parts being
damage during use of the equipment.
11) In case of participation on the hydraulic system, to unload the
hydraulic pressure carrying all the hydraulic commandos in all
the positions some times after to have extinguished the motor.
12) Before carrying out checking operations, maintenance or
adjustment on the hydraulic system, the operator must put on
suitable PPEs*.
* - Summary of the personal protection equipment (PPE) to be used during
the machine's various operating phases.
The hydraulic system is supplied without oil.
Before use, it is essential to ensure that all of the hydraulic cylinders are
made to move in both directions until the hoses and the cylinders fill up
with oil. Operations on the hydraulic system must be carried out in absence
of pressure and with the equipment resting on the ground.
Z
T
0,2 T
d i
Fig. 12
cod. F07011424
USE AND MAINTENANCE
VELOCE FOLDED
M
s1 s2
3.5 THE STABILITY OF THE EQUIPMENT IN ROAD
TRAFFIC
When a equipment is coupled to a tractor, so becoming an integral
part of it for the purposes of road travel, the stability of the
equipment-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 fol-
lowed;
these prescribe that at least 20% of the weight of the tractor
alone should be borne by the front 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:
((M x (s1 + s2)-(0,2 x T x i))
Z>
The symbols have the following meanings: (Fig. 12):
M (kg) Mass weighing on arms off hoist with full load (weight +mass,
see cap. 1.5 Identification).
T (Kg) Tractor weight
Z (Kg) Total mass of ballast.
i (m) Tractor wheelbase, that is, the horizontal distance between
the tractor axles.
d (m) Horizontal distance between the centre of gravity of the
ballast and the front axle of the tractor.
s1 (m) Horizontal distance between the inferior point of attach-
ment of the equipment and the posterior axle of the tractor
(equipment supported to the ground).
s2 (m) Horizontal distance between the barycentre of the
equipment and the inferior point of attachment of the
equipment (equipment supported to the ground).
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
equipment 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 greater stability during travel.
To calculate the formula, refer to the table below.
VELOCE FOLDED- Fig.13
MODEL 400
M (kg) 3140
S2
ENGLISH
(d+i)
500 600
3660 4060
1200
33