Important - Grillo FD450 Manuel D'utilisation

FD450/ Translation of the original instructions
IMPORTANT: this operation has to be carried out in a clean environment to prevent
impurities or ground residues from entering the hydrostatic axle and causing damage.
Therefore, we ecommend the replacement of oil into the hydrostatic axle to be carried out
only by a Grillo authorised service centre.
REAR WHEEL AXLE
Grease the rear wheel pivot pins every 20 hours (fig. 41, A).
DIFFERENTIAL LOCK
To engage the differential lock, press the pedal (fig. 1, n.2). Adjust the control cable and lever so
that the differential lock can be correctly engaged and disengaged (fig. 9). When releasing the
pedal, the differential lock must disengage. Do not use the differential lock when changing direction
because the differential lock components could be strained.
SHARPENING THE BLADES
A blunt blade pulls at the grass, giving it an unsightly appearance. The cutting edges of both
blades must therefore always be kept sharp and worn blades must be replaced. To sharpen the
blades first remove the mower deck (fig. 26) then follow the instructions below:
1) Position the mower deck in its lowest cutting position.
2) Remove the protection guard above the deck by unscrewing both wing nuts (fig. 25).
3) Remove the pin (fig. 25, A).
4) Turn the lever anti-clockwise (fig. 25, B).
5) Remove the PTO belt (fig. 25, C).
6) Detach the wire of the electric wire (fig. 25, F).
7) Release the fork (fig. 31, B), pull the deck forward and set it vertical (fig. 26). It is recommended
to open the grass catcher and take off the discharge chute. (fig. 32, A).
Worn blades lose their cutting efficiency and tend to become unbalanced, causing the mower to
vibrate. If the unbalance persists even after sharpening, check the balance by inserting a
screwdriver in the hole in the centre of the blade and hold up, grind the blade until it remains
horizontal and is therefore balanced. To remove a blade, take hold of it firmly, wearing safety
gloves, and undo the centre bolt (IMPORTANT: the right hand blade bolt has a left thread).
CAUTION!
Always replace damaged or worn-out blades; never attempt to repair them! ALWAYS USE
ORIGINAL BLADES!
CAUTION!
In order to reassemble the cutting deck, you have to fit together the cutting deck lead (fig.23, A)
with the one which is located on the machine, between the wheels, in the centre.
LUBRICATION WITH GREASE
Follow the lubrications points scheme (fig. 41A – 41B). Lubricate with grease every 40 hours the
rear axle joints, pedals and the grass-catcher lifting arms.
ADJUSTING THE CUTTING DECK
A level deck is essential for a uniform cut. With the mower on a flat surface, check that the tyre
pressures are correct and check the float spring tension (fig. 10, A). If a satisfactory parallel set-up
cannot be achieved, adjust the register (fig. 20, A). To adjust the mowing height, place two 25 mm
shims at the sides under the edge of the deck and put the deck in its lowest position using the
button on the dashboard. Use the screw (fig. 24, B). Before carrying out this procedure loosen the
two screws (fig. 24, A). at the rear part of the mower deck, two anti-scalp wheels are fitted (fig. 34,
C). Their height can be adjusted through the three fixing holes.
DRIVE BELTS – HYDROSTATIC AXLE
These belts are self-adjusting and do not require any adjustment. Simply check the tension of the
springs. To replace these belts, release both tension springs (fig. 22, A – B).
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