Grillo 4 BIS Emploi Et Maintenance page 13

ROTARY TILLER SUPPORT WHEEL
It is very useful while travelling between jobs, because it keeps the rotary tiller off the ground, making transfer
easier and less tiring (fig. 21).
ADJUSTABLE FURROWER
This implement is specially designed for preparing furrows for sowing and irrigation (fig. 10). 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 (fig. 18) which
increase wheel grip.
COMBINED FURROWER
Like the adjustable furrower, this implement is used for preparing furrows for sowing and irrigation, but it is
mounted above the rotary tiller instead of the tiller cover, and the two implements work together (fig. 25).
PLOUGHS
The ploughs (fig. 14) designed for this walking tractor have been especially developed to obtain good ploughing
without overstraining the operator. The models available are a single-share plough and a 180° roll-over plough.
The latter is especially suitable when working backwards and forwards, such as along rows of vines or fruit-trees.
The depth of the furrow obtained may vary from 10 to 15 cm depending on the terrain. The use of steel wheels
is recommended (fig. 23).
CUTTER BAR
The cutter bar which can be attached to the walking tractor has a central 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
cutter bar which would remain unused for most of the year, while a walking tractor can be used with other
implements.
The cutter bar is attached to walking tractor implement frame instead of the rotary tiller and fixed using the same
two nuts. The handlebar must be turned through 180° towards the engine. Before turning the handlebar engage
first gear, then release the drive rods and PTO lever. Once the handlebar has been turned, fit the drive rods back
into the supports.
To drive the cutter bar, disconnect the safety device which prevents simultaneous engagement of the reverse
speed and the PTO (necessary when using the rotary tiller) by simply removing the screw that blocks the gear
lever and stops the engagement of the two functions together (fig. 27 and fig. 28).
Important: when reconnecting the rotary tiller, the safety device must be set in the original position. We
do not accept any responsibility for failure to follow this rule.
Maintenance
Grease the cross pins every 8 working hours through the grease nipples on the swinging crank. Grease the
cutter bar swinging bushing every 50 working hours through the grease nipple under the swinging protection.
Please refer to fig. 30 for the lubrication points. 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. 11 and fig. 12) and
adjust the pressing-down 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 30 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 cutter 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 walking tractor. 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 flange using two nuts. The handlebar must be turned through 180°
towards the engine; for this operation follow the directions given for the cutter bar. To operate the snow thrower,
the safety device preventing simultaneous engagement of reverse gear and the PTO (necessary with the rotary
tiller), must be disconnected by removing the allen screw on the PTO lever (fig. 27).
Important: when reconnecting the rotary tiller, the safety device must be set in the original position. We
do not accept any responsibility for failure to follow this rule.
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