Grillo FD450 Manuel D'utilisation page 18

FD450/ Translation of the original instructions
IMPORTANT
To move the machine with the engine off, activate the by-pass valve using the lever (fig. 27, A).
MECHANICAL PARKING BRAKE
Always keep the cable (fig. 28B, A) properly adjusted, so that the parking brake is engaged setting
the lever (fig. 3, n. 7) into the parking position (symbol "P"). The parking brake is disengaged by
setting the lever again. When the parking brake is engaged and the PTO is disengaged, it is
possible to temporarily leave the driving seat whilst the engine keeps on running. Caution: never
leave the machine unattended while engine is running.
ADJUSTMENT OF THE NEUTRAL/IDLE POSITION
Gently press the forward pedal (fig. 1, n. 1): pressing the pedal in the A position the machine
moves forward, pressing the pedal in the B position the machine moves backwards. When
releasing the pedal the machine stops. If the machine does not stop completely when releasing the
pedal, the neutral position can be adjusted through the adjuster (fig. 46). This adjustment has to be
carried out with the engine running, the machine in a steady, safe position and the front wheels
raised from the ground. Remove the cover of the steering column, then loosen both screws (fig. 46,
A) and adjust the lock bracket of the forward spring (fig. 46, B) so that the wheels stop completely.
Once the adjustment is completed, tighten both screws again (this procedure has to be carried
out by an authorised Grillo service centre only).
IMPORTANT: this adjustment has to be carried out gradually, performing slight adjustment at a
time. By increasing the stroke of the lever on the hydrostatic transmission through the rod
connected to the pedal, the wheels have more traction and go faster (this procedure has to be
carried out by an authorised Grillo service centre only).
GRASS-CATCHER
The hydraulic cylinders for lifting and tipping of the grass-catcher can be adjusted. Pay attention
not to force the cylinders against the stroke buffers. The parallelogram rod is provided with left and
right-hand threads. These can be adjusted to make the grass-catcher perfectly fit the discharge
chute (fig.40, B). The two brackets that fix the discharge chute can be adjusted too (fig. 32, B). This
operation must be carried out when the grass-catcher is closed. The tipping hydraulic cylinder can
be adjusted so that the grass-catcher leans against the front stroke buffers. Pay attention not to
force the cylinders against the stroke buffers: the cylinder must just touch the buffers.
REAR AXLE
Lubricate with grease all the joints. Should signs of an abnormal wear of the wheels appear, use a
leveller bar to align the rear wheels with the front wheels. Use the nut (fig. 33, C).
ELECTRO-HYDRAULIC DISTRIBUTOR
The electro-hydraulic distributor (fig. 13, E) is made up of 3 components held together thanks to
four rods and nuts whose tightening torque is 5 N/m. If this value is not respected, the electro-
hydraulic distributor does not work.
ELECTRICS
The electrical system is protected by two fuses. The 16A fuse (fig. 2, n. 6) is located on the
dashboard and protect all the functions of the machine: if tripped, the engine only can be started.
The other 25A fuse is located near to the electro-hydraulic distributor and protects the whole
electric wiring. If tripped, this fuse stops all the electric functions of the machine (fig. 29, A). After
identifying and repairing the fault, replace the blown fuse with another of the same rating.
Never replace a fuse with one of different rating. If the problems persist after the above
procedures have been carried out, contact an authorised service centre. Never attempt to carry out
complex repairs if you do not have the necessary equipment and technical skills. If the engine or
the battery are out of order, the grass-catcher can be opened manually: insert the key and sit on
the driver's seat. In this way the hydraulic valve is relieved. Push the button to open the grass-
catcher (fig, 5, n. 13) and open the grass-catcher manually. The battery is located under the grass-
catcher in the rear part of the machine (fig. 33, A). If it is out of order, the battery can be removed
and recharged.
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