Grillo G55 Uso Y Mantenimiento página 12

I M P L E M E N T S
ROTARY TILLER
The rotary tiller is used to break the surface layer of the ground in order to increase its permeability and at the same
time to rid it of weeds.
Till in first speed if the soil is hard and tough or in second speed in soft, sandy soil.
The working depth can be adjusted by lifting or lowering the central knife situated under the rotary unit. The tiller
cover position will change at the same time. Raise the knife to increase the depth. Start work with the knife in its
lowest position, and then raise it if greater depth is required.
N.B. - On hard soils the machine may jump forward. In this case lower the central knife and fit it into the
third hole. Check that the blades are fitted correctly (see fig. 9).
ADJUSTABLE FURROWER
This implement is specially designed for preparing furrows for sowing and irrigation. It is mounted like a plough or
a rotary tiller on the implement flange on the back of the gearbox.
The furrow width can be regulated from a minimum of 10 cm to a maximum of 30 cm, by changing the position of
the two wings.
The depth can be varied from 10 to 20 cm. When working on particularly hard soils, till before furrowing. The results
obtainable can be improved by fitting the 5.00-12 tyres and if necessary the wheel-weights which increase wheel
grip (fig. 10).
BACK-CUTTER FURROWER
This tool is mounted at the rear of the tiller and works in tandem with it. The furrower is designed to produce irrigation
and seed drills (figure 11).
MOWER BAR
The mower bar which can be attached to the rotovator has a central or side control. Its strength and high
performance make it the best way of mowing small pieces of land when it does not make economic sense to
purchase a motor mower which would remain unused for most of the year, while a rotovator can be used with other
implements.
The mower bar is attached to the rotovator implement frame instead of the rotary tiller. The handlebar must be
turned 180° towards the engine.
Before turning the handlebar engage first gear, then release the drive rods.
Once the handlebar has been turned, fit the rods back into the supports.
Now that the handlebar has been reversed the handlebar support mechanism enables the use of all the rotovator
gears, except the fastest speed which could be dangerous.
Maintenance: grease the cross pins every 8 working hours through the grease nipples on the swinging crank.
Grease the mower bar swinging bushing every 50 working hours through the grease nipple under the swinging
protection.
Keep the blade ledger plates properly adjusted. They must be neither too tight, so that they block the blade, nor
too loose so that there is too much clearance between them and the blades. To adjust the ledger plates in both
directions loosen the locking bolts (fig. 12-13) and adjust the pressor screw. The ledger plates should be replaced
when worn even if they are still able to apply pressure against the blades.
Regulate the clearance between the blade and the strip by loosening the screws fixing the plates pressing the strip
and moving the strip forward until it touches the bar which supports the nailed blade section. Then retighten the
pressing plates.
To remove the blade take off the L-shaped blade coupling by removing the two screws (fig 14 no. 3) and slip off
the blade. Take care to tighten the fixing screws of the coupling after assembling the blade again.
Always use sharp blades: the machine will be subject to less strain and its working life will be longer.
Clean the mower bar after every working day, removing any remaining pieces of grass or earth; every now and then
check that all screws are tight.
SNOW THROWER
This implement has been especially designed for this particular rotovator. It is very useful for clearing snow from
yards, driveways, etc. It consists of a turbine rotary unit enclosed in a special case open at the front, which rotates
at high speed, collecting the snow and throwing it along a pipe. The pipe angle can be adjusted to throw the snow
in any direction to a distance of 8 - 10 metres.
The snow thrower is fixed to the implement using two nuts. The handlebar must be turned through 180° towards
the engine; for this operation follow the directions given for the mower bar.
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