Grillo G131 Manual De Instrucciones página 19

Translation of the original instructions
TOWED TRAILER
The towed trailer is very useful for short transfers (fig. 19). 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. 9) leaving the tiller in place. Max. load: 400 kg on even ground. Do
not use the trailer on slopes greater than 5%. Passengers are not allowed. The trailer cannot
be used on public roads.
TOW 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. 9).
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 adherence to the ground, 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 (fig. 10).
WHEEL EXTENSIONS
These help to widen the machine 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. 6).
WIDE STEEL WHEELS
These wheels (fig. 7) are recommended 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. Wide steel wheels can also be used when tyres or narrow
steel wheels normally 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 recommended given
that, if special grip is not required, they grant the machine even more traction and act as an elastic
buffer between the machine and the ground.
CUTTING BAR
The cutting bar (fig. 14) 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 is not
convenient to purchase a sickle mower which would remain unused for most of the year, while a
walking tractor can be used with other implements. The cutting bar is attached to the walking
tractor implement frame instead of the rotary tiller and fixed using the two nuts of the rotary tiller.
The handlebar must be turned 180 over the engine. Before turning the handlebar remove the four
control levers and replace them with those of the appropriate kit for cutting bar. It is recommended
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to engage the 2 gear when using this machine with the cutting bar (see the speed table in sickle-
bar version in the paragraph INSTRUCTIONS FOR USE of the present manual). Important: if the
rotary tiller is connected again, the safety system has to be brought back to its original
working condition. Grillo bears no responsibility in case of non-compliance with this rule.
Maintenance: grease the cross pins every 8 working hours through the grease nipples on the
swinging crank. Grease the cutting 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 and adjust the pressure screw. The ledger plates should be replaced when worn even
if they are still able to apply pressure against the blades. Adjust the free-play 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 re-tighten the
pressing plates. To remove the blade take off the L-shaped blade coupling by loosing the two
screws 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 cutting bar after every working day, removing any
remaining pieces of grass or earth; frequently that all screws are tight.
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