Grillo G84 Manual De Instrucciones página 14

Translation of the Original Instructions
N.B. - On hard soils the machine may jump forward. In this case lower the central knife and
fit it into the first hole (fig. 4B, n. 1). Check that the blades are fitted correctly (see fig. 9).
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 rotovator
implement frame instead of the rotary tiller and fixed using the same two nuts. 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. To drive the mower bar,
disconnect the safety device which prevents simultaneous engagement of the reverse speed and
the P.T.O. (necessary when using the rotary tiller – fig. 2) by simply removing the screw that blocks
the gear lever and stops the engagement of the two functions together. Important: when
reconnecting the rotary tiller, the safety device must be set in the original position (fig.2A).
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. 11, n.6) 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 11 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.
PLOUGHS
The ploughs designed for this Rotavator have been especially developed to obtain good ploughing
without overstraining the operator (fig. 10). The depth of the furrow obtained may vary from 10 to
15 cm depending on the terrain. Users can achieve excellent performances using high tyres and
possibly the wheel-weights, which improve machine's adhesion.
TOW BAR
The towing bar is needed to attach the riding sulky or the trailer to the machine without removing
the rotary tiller. This attachment must be fastened to the towing hook on the Rotavator (fig. 12).
ROTARY TILLER SUPPORT WHEEL
It is very useful while transferring the machine, because it keeps the rotary tiller off the ground,
making transfer easier and less tiring (fig. 13).
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. 14).
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