Grillo FD13.09 Uso Y Mantenimiento página 15

driven by an electric engine. If the radiator protection grids are obstructed and the cooling fluid and the hydraulic oil
temperature gets over 88° C, a sensor automatically reverses the direction of rotation of the fan for a few minutes in
order to clean the grids. This operation can also be made by hand, activating for a few second the fan inverter
button (fig. 1 n° 25). To check and clean the radiator fan, use the lever (fig. 15, ref. A).
RADIATOR REFILLING AND PURGE
Caution! Danger: hot liquid under pressure.
In order to let the engine cool down correctly, there should be no air in the cooling circuit. Make sure that the
clamps on the water muffs are well tight and that no air can get into the circuit from the outside.
Make the air bleed in the following way:
Caution! For this operation always wear suitable working gloves.
1) Pour water into the expansion tank (fig. 7).
2) Start the engine and bring it to working temperature (to make sure the engine thermostatic valve is open).
3) With the engine at minimum, open the engine cooling liquid refilling bowl on the right side of the driving seat
(fig. 7).
4) Unscrew the screw for the bleed on the upper part of the radiator (fig. 15, ref. C).
5) With the screw open, accelerate to medium speed and reduce the speed several times until only liquid comes
out.
6) Tighten the screw.
7) Accelerate again for some minutes.
8) Unscrew the bleed screw again and repeat the steps 5-6-7 four or five times until only liquid comes out.
9) At the end, re-establish the liquid level in the bowl and close the lid.
ELECTRO-HYDRAULIC DISTRIBUTOR
The electro-hydraulic distributor (fig. 16) consists of four blocks held together with three tie rods with nuts (fig. 16,
ref. A) whose tightening torque is 12 N/m. If this grip is not kept, the distributor will block.
HYDRAULIC MOTORS
Check the level in the reservoir with the motors cold (fig. 4). If more oil is needed, add hydraulic oil OSO 46 (total
quantity: 20 litres). Carry out this control periodically. Caution! Change the hydraulic oil in the hydraulic motors
after the firts 500 hours and then every 1000 hours. The oil must be changed before the 500 hours if:
- the oil is black;
the oil has a whitish colour (it is contaminated with water);
-
there is black coloured residue (partial oil deterioration).
-
To remove the oil undo the lower oil reservoir drain plug (fig. 18). To fill it, unscrew the upper lid (fig. 16, ref. B). Pay
attention to possible impurities, which may obstruct the circuit, causing serious problems to your machine. When
you change the hydraulic oil, you must also change the oil filter (fig. 19); pay attention to the filtration level. Do not
increase the wheels towing hydraulic system pressure over 250 bar; the hydraulic pump and the hydrostatic motors
on the wheels may be damaged.
132 cm CUTTING DECK GEAR BOXES
Use synthetic oil LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2) quantity 1.550 litres to be changed every 250
hours. The oil level lid is positioned over the gear boxes (fig. 22). If you notice any loss, check and change the oil
guards to avoid the deterioration of the entire transmission.
P.T.O. GEARBOX
Use synthetic oil LSX 75 W 90 (API GL4 + GL5; API MT1 and PG2) quantity 0,4 litres to be changed every 250
hours. The gearbox is equipped with a cap on the upper level (fig. 36) and an oil drain cap at the lower part.
Replace every 250 hours (fig. 39).
LOAD CHUTE
The load chute device (fig. 20) has got two functions: to give the grass the drive for the loading and to finely cut up
grass and leaves to reduce the volume. It consists of a rotor on which 18 floating vanes are fitted (9 right ones and 9
left ones) with special anti-wear steel screws. It is driven by an electromagnetic clutch and a belt whose tension is
adjusted with a spring that has to be held at 70 mm of length (fig. 6, ref. B) see red arrow). In case the FD13.09 is
used with accessories that do not need the loading function (all purpose flail, brush ), it is possible to stop the
accelerator's rotation by acting on the button located on the left-hand side below the seat (fig. 1, ref. 11). During the
cutting deck engagement with the button (fig. 1 n° 27) first the accelerator and then the blades are started. To avoid
clogging, when the grass catcher is full, the sensor connected to the control unit first makes the blades stop and
then the loading accelerator rotation. If the loading accelerator vanes are worn-out, they have to be replaced
together with the screws (use original screws). To change the vanes you have to remove the cutting deck from the
machine and remove the cover (fig. 27, ref. B) fixed with six screws. If there are vibrations, you have to check that
foreign bodies did not damage the vanes.
Translation of the original instructions
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