36
3
SAFETY PRECAUTIONS
id.:
D 70
SL REV. 00 02/11/2009
3.2.5 OVERTURNING
- The operator must be fully knowledgeable with the performance, weight and the maximum load the vehicle
can transport in relation to the ground conditions (fl at, compact, uneven, sloping).
- Before starting to work, always check that the area on which the vehicle wheels stand is suffi ciently solid and
capable of supporting its weight and, consequently, keep at a safe distance from the edge of the excavation.
- Check that the site paths are adequate and that the working areas are clear and suitable for transit of the
vehicle and its stability.
- Analyse and record the topography and geological characteristics of the site in order to take the appropriate
preventive measures against the vehicle overturning, landslides or landslips.
- Consider the characteristics of the ground complementary to those of the vehicle; variables controlled by the
operator such as speed, angle of attack on slopes, gradient of the ground, load distribution etc., are essential
to minimise the risk of overturning.
- Follow the rules given in the chapter on driving on slopes.
CAUTION: Observing the recommended gradient limits does not mean that you can manoeuvre the
vehicle in total freedom in all load, ground or manoeuvring conditions on a slope. In any
event, it is advisable to halve the gradient values on wet or uneven ground.
- Pay the greatest attention when you need to unload on sloping ground; position the dump body facing uphill
and the driver’s seat facing downhill.
- In the case of a vehicle with central articulation, always keep it with the two frames aligned on the same axis
to avoid possible overturning.
- Avoid reaching the limit conditions and generally act with great caution and carefully: adapting to the ground
and visibility conditions by adjusting the speed and changing paths and avoid sudden braking, acceleration
and changes in direction.
- The vehicle may be used on sloping ground only within the limits indicated by the manufacturer. Where the
ground is particularly steep and inaccessible, it is advisable to have only experienced operators use the
vehicle.
- The vehicle may also overturn because of uneven ground, the ground caving in (especially when working
near the edge of the road or the manoeuvring surface), slipping on wet or muddy surfaces or making incorrect
or careless manoeuvres (sudden acceleration or steering, unbalanced load, excessive speed, etc.).
- Do not steer sharply at high speed.
- The vehicle centre of gravity may shift in relation to the size and position of the load, the gradient of the
ground and the movement of the vehicle.
- While the dump body is tilting during unloading, the barycentre changes continuously and the conditions
of the ground will determine the vehicle’s stability. There are particular risks for wheeled dumpers working
on soft ground and if the material to be unloaded sticks to the dump body, for example, wet clay or frozen
material. This may cause the vehicle to lose its stability; the stability must be carefully checked beforehand
and the appropriate measures taken to facilitate unloading.
- If you need to unload the material from the edge of an escarpment, you must position vehicle blocking
devices. These devices must be made of a material strong enough to stop the vehicle from moving forward.
CAUTION: Never stand on the edge of an escarpment without blocking the vehicle with specifi c
devices.
- The vehicle is equipped with a ROPS safety cabin. Nevertheless, in the event of the vehicle overturning, if
you do not have the seatbelt fastened, you will be thrown out with the risk of getting crushed by the vehicle.
IN THE EVENT OF OVERTURNING
The protective structure makes the driver’s seat the only safe place to be should the vehicle overturn.
DURING OVERTURNING
Never leave the vehicle but remain seated fi rmly, gripping the seat or the steering wheel.
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