Grillo 4 BIS Emploi Et Maintenance page 14

The snow thrower is 70 cm wide and can clear snow up to 40 cm deep. Wheel weights should be used for best
performance. If the snow is very wet, keep the ejection pipe turned forward to avoid obstructions at the outlet.
The two side skids must be adjusted so that they just skim level ground (asphalted streets) or keep the snow
thrower high if the ground is uneven.
Maintenance
When work is over, remove any snow left in the snow thrower so it cannot freeze and block the turbine.
ROTARY CUTTER
The 75-cm rotary cutter for the walking tractor (fig. 15) is designed for the maintenance of areas with tall grass.
The high power available and the driving wheels allow operation in the most difficult conditions without tiring the
operator and with considerable time saving.
The rotary cutter is fixed to the implement flange using two stud nuts. It is supplied together with side skids to facilitate
work in the worst ground conditions and a front support wheel for working on flat ground and with low grass.
The handlebar must be turned through 180° towards the engine; for this operation follow the directions given for
the cutter bar. The blade is driven by means of a bevel gear and is equipped with a release mechanism so that
its force of inertia cannot drag the machine forward when the clutch is engaged.
To adjust the cutting height act on the front wheel or the side skids.
Frequently check the oil in the bevel gear box. Use gearbox oil MP 80W/90 to fill up.
ALL PURPOSE FLAIL
The 68-cm all purpose flail (fig. 16) has a roller fitted with swinging Y-shaped hammers and is able to cut tall
grass, tough stalks and small shrubs into fine pieces; it can also twigs etc. after pruning. Used with mower blades
instead, it gives excellent results on smooth lawns.
TILTING FRONT DOZER BLADE - 125 cm
This highly resistant device is ideal for removing snow and levelling mounds of soil or gravel. May be tilted to the
right and left (figure 26).
TOWED TRAILER
The trailer designed for the walking tractor (fig. 17) is very useful for short hauls around the farm. It is easy to handle,
compact and very quickly hitched to the walking tractor. The trailer can be attached directly to the machine by hitching
it to the special towing bar (fig. 20) leaving the tiller in place. Max. load capacity: 300 kg on level ground.
TOWING BAR
The towing bar is needed to attach the trailer to the machine without removing the rotary tiller. This attachment
must be fastened to the towing hook on the walking tractor (fig. 20).
WHEEL EXTENSIONS
These help to widen the machine's track and increase its stability on crosswise slopes. They must be fixed
between the wheels and the hubs. The track is widened by 6 cm on each side (fig. 22).
WIDE STEEL WHEELS
These wheels are particularly advisable when working on very hard soils with the rotary tiller. The cross bars
placed around the wheels dig into the ground, giving the machine a firm grip and preventing the wheels from
skidding (fig. 23). The wide steel wheels can be also used when tyres or the narrow steel wheels, might skid
or sink in damp or recently tilled ground. The use of wide steel wheels is recommended, although only in these
cases. Otherwise tyres are generally advisable; if special grip is not required, they give the machine more even
traction and form an elastic buffer between the machine and the ground.
Doble rings are also available for fitting to these wheels.
WHEEL-WEIGHTS
These are mounted on the wheel rims and fixed with two of the four nuts which fix the wheels themselves. They
increase the weight of the machine and thus its grip, and their use is recommended when working with the
plough, the adjustable furrower, and even the rotary tiller and the trailer if special performances are required.
They weigh 18 kg each (fig. 18).
BRAKES
The walking tractor being very manoeuvrable and light is not commonly equipped with brakes, but when working
on steep areas it may be required a braking device. For this reason two drum brakes are available on request.
They are activated by two handles to be fitted to the handle bar.
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